diff --git a/README.md b/README.md
index 5d561d1..204d017 100644
--- a/README.md
+++ b/README.md
@@ -59,3 +59,10 @@ This is the formed pulse at point B, from 5 V to about 0.5 V for 200 µs:
 ![Formed pulse at output point B](media/geiger-signal-formed.png)
 
 It is then fed into a 555 timer to further extend its duration for the ESP32 wake-up from low-power mode.
+
+# DRAFT Circuit Sketch - Schematics
+
+This is a draft version of the circuit sketch, drawn with KiCad, files are in folder `hardware`.
+It may still contain errors since I've quickly drawn it from my head and from re-engineering the breadboard above.
+
+![Schematics](media/kicad-circuit-sketch.png)
\ No newline at end of file
diff --git a/hardware/kicad/lib/geiger.dcm b/hardware/kicad/lib/geiger.dcm
new file mode 100644
index 0000000..b300258
--- /dev/null
+++ b/hardware/kicad/lib/geiger.dcm
@@ -0,0 +1,9 @@
+EESchema-DOCLIB  Version 2.0
+#
+$CMP MPSA44
+D 0.5A Ic, 400V Vce, NPN High Voltage Transistor, TO-92
+K NPN High Voltage Transistor
+F http://www.onsemi.com/pub_link/Collateral/MPSA42-D.PDF
+$ENDCMP
+#
+#End Doc Library
diff --git a/hardware/kicad/lib/geiger.lib b/hardware/kicad/lib/geiger.lib
new file mode 100644
index 0000000..352d497
--- /dev/null
+++ b/hardware/kicad/lib/geiger.lib
@@ -0,0 +1,135 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# ADS1115_ADC_Module
+#
+DEF ADS1115_ADC_Module U 0 40 Y Y 1 F N
+F0 "U" 300 150 50 H V C CNN
+F1 "ADS1115_ADC_Module" 350 50 50 H V C CNN
+F2 "" 300 150 50 H I C CNN
+F3 "" 300 150 50 H I C CNN
+DRAW
+S 100 -50 550 -1150 0 1 0 f
+X A3 1 0 -1050 100 R 50 50 1 1 I
+X VDD 10 0 -150 100 R 50 50 1 1 W
+X A2 2 0 -950 100 R 50 50 1 1 I
+X A1 3 0 -850 100 R 50 50 1 1 I
+X A0 4 0 -750 100 R 50 50 1 1 I
+X ALRT 5 650 -650 100 L 50 50 1 1 O
+X ADDR 6 650 -550 100 L 50 50 1 1 I
+X SDA 7 650 -450 100 L 50 50 1 1 B
+X SCL 8 650 -350 100 L 50 50 1 1 I
+X GND 9 0 -250 100 R 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
+# EzSBC_ESP32-01
+#
+DEF EzSBC_ESP32-01 U 0 40 Y Y 1 F N
+F0 "U" 0 900 50 H V C CNN
+F1 "EzSBC_ESP32-01" 0 750 50 H V C CNN
+F2 "" 0 900 50 H I C CNN
+F3 "" 0 900 50 H I C CNN
+DRAW
+S -850 1050 850 -1050 0 1 0 f
+X GND 20 -950 -950 100 R 50 50 0 0 W
+X GND 21 950 -950 100 L 50 50 0 0 W
+X Vin 22 950 -850 100 L 50 50 0 0 W
+X 3.3V 23 950 -750 100 L 50 50 0 0 w
+X GND 3 -950 750 100 R 50 50 0 0 W
+X 3.3V 32 950 150 100 L 50 50 0 0 w
+X Vin 37 950 650 100 L 50 50 0 0 W
+X GND 38 950 750 100 L 50 50 0 0 W
+X IO36 1 -950 950 100 R 50 50 1 1 I
+X IO25/RTC6 10 -950 50 100 R 50 50 1 1 B
+X IO26/RTC7 11 -950 -50 100 R 50 50 1 1 B
+X IO27/RTC17 12 -950 -150 100 R 50 50 1 1 B
+X n.c. 13 -950 -250 100 R 50 50 1 1 N
+X IO23/VSPI_MOSI 14 -950 -350 100 R 50 50 1 1 B
+X IO22/I2C_SCL 15 -950 -450 100 R 50 50 1 1 B
+X IO21/I2C_SDA 16 -950 -550 100 R 50 50 1 1 B
+X EN/Reset 17 -950 -650 100 R 50 50 1 1 I
+X 3.3V 18 -950 -750 100 R 50 50 1 1 w
+X Vin 19 -950 -850 100 R 50 50 1 1 W
+X IO39 2 -950 850 100 R 50 50 1 1 I
+X IO0/RTC11/Boot 24 950 -650 100 L 50 50 1 1 B
+X IO2/RTC12 25 950 -550 100 L 50 50 1 1 B
+X IO4/RTC10 26 950 -450 100 L 50 50 1 1 B
+X IO5/VSPI_SS 27 950 -350 100 L 50 50 1 1 B
+X IO12/RTC15/HSPI_MISO 28 950 -250 100 L 50 50 1 1 B
+X IO13/RTC14/HSPI_MOSI 29 950 -150 100 L 50 50 1 1 B
+X IO14/RTC16/HSPI_SCK 30 950 -50 100 L 50 50 1 1 B
+X IO15/RTC13/HSPI_SS 31 950 50 100 L 50 50 1 1 B
+X IO16/L1_RED 33 950 250 100 L 50 50 1 1 B
+X IO17/L1_GREEN 34 950 350 100 L 50 50 1 1 B
+X IO18/VSPI_SCK/L1_BLUE 35 950 450 100 L 50 50 1 1 B
+X IO19/VSPI_MISO/L2_BLUE 36 950 550 100 L 50 50 1 1 B
+X IO3/RX0 39 950 850 100 L 50 50 1 1 I
+X Vin 4 -950 650 100 R 50 50 1 1 W
+X IO1/TX0 40 950 950 100 L 50 50 1 1 O
+X IO35 5 -950 550 100 R 50 50 1 1 I
+X IO34 6 -950 450 100 R 50 50 1 1 I
+X IO33/RTC8 7 -950 350 100 R 50 50 1 1 B
+X IO32/RTC9 8 -950 250 100 R 50 50 1 1 B
+X 3.3V 9 -950 150 100 R 50 50 1 1 w
+ENDDRAW
+ENDDEF
+#
+# MPSA44
+#
+DEF MPSA44 Q 0 40 Y N 1 F N
+F0 "Q" 200 75 50 H V L CNN
+F1 "MPSA44" 200 0 50 H V L CNN
+F2 "Package_TO_SOT_THT:TO-92_Inline" 200 -75 50 H I L CIN
+F3 "" 0 0 50 H I L CNN
+$FPLIST
+ TO?92*
+$ENDFPLIST
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 0 0 25 0 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 50 -70 70 -50 90 -90 50 -70 50 -70 F
+X E 1 100 -200 100 U 50 50 1 1 P
+X B 2 -200 0 200 R 50 50 1 1 I
+X C 3 100 200 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Pressure_R_Bridge
+#
+DEF Pressure_R_Bridge U 0 40 Y Y 1 F N
+F0 "U" 650 -850 50 V V C CNN
+F1 "Pressure_R_Bridge" 550 -850 50 V V C CNN
+F2 "" 650 -850 50 V I C CNN
+F3 "" 650 -850 50 V I C CNN
+DRAW
+A -450 -850 50 -899 899 0 1 0 N -450 -900 -450 -800
+S -450 -450 450 -1250 0 1 0 f
+S -250 -1000 -50 -1100 0 1 0 N
+S -250 -700 -50 -600 0 1 0 N
+S 50 -1100 250 -1000 0 1 0 N
+S 50 -600 250 -700 0 1 0 N
+P 2 0 1 4 -50 -1050 50 -1050 N
+P 2 0 1 4 0 -1050 0 -1250 N
+P 2 0 1 4 0 -450 0 -650 N
+P 2 0 1 4 50 -650 -50 -650 N
+P 3 0 1 4 -300 -1250 -300 -1050 -250 -1050 N
+P 3 0 1 4 -300 -450 -300 -650 -250 -650 N
+P 3 0 1 0 -200 -1000 -150 -1100 -100 -1000 N
+P 3 0 1 0 -200 -700 -150 -600 -100 -700 N
+P 3 0 1 0 100 -1100 150 -1000 200 -1100 N
+P 3 0 1 0 100 -600 150 -700 200 -600 N
+P 5 0 1 4 250 -1050 300 -1050 300 -450 300 -650 250 -650 N
+X A_low 1 -300 -1350 100 U 50 50 1 1 P
+X A_mid 2 0 -1350 100 U 50 50 1 1 P
+X n.c. 3 300 -1350 100 U 50 50 1 1 N
+X AB_top 4 300 -350 100 D 50 50 1 1 P
+X B_mid 5 0 -350 100 D 50 50 1 1 P
+X B_low 6 -300 -350 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+#End Library
diff --git a/hardware/kicad/project/geiger/geiger-cache.lib b/hardware/kicad/project/geiger/geiger-cache.lib
new file mode 100644
index 0000000..c4baa41
--- /dev/null
+++ b/hardware/kicad/project/geiger/geiger-cache.lib
@@ -0,0 +1,436 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Connector_Conn_01x02_Male
+#
+DEF Connector_Conn_01x02_Male J 0 40 Y N 1 F N
+F0 "J" 0 100 50 H V C CNN
+F1 "Connector_Conn_01x02_Male" 0 -200 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+S 34 -95 0 -105 1 1 6 F
+S 34 5 0 -5 1 1 6 F
+P 2 1 1 6 50 -100 34 -100 N
+P 2 1 1 6 50 0 34 0 N
+X Pin_1 1 200 0 150 L 50 50 1 1 P
+X Pin_2 2 200 -100 150 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Connector_Conn_01x04_Female
+#
+DEF Connector_Conn_01x04_Female J 0 40 Y N 1 F N
+F0 "J" 0 200 50 H V C CNN
+F1 "Connector_Conn_01x04_Female" 0 -300 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+A 0 -200 20 901 -901 1 1 6 N 0 -180 0 -220
+A 0 -100 20 901 -901 1 1 6 N 0 -80 0 -120
+A 0 0 20 901 -901 1 1 6 N 0 20 0 -20
+A 0 100 20 901 -901 1 1 6 N 0 120 0 80
+P 2 1 1 6 -50 -200 -20 -200 N
+P 2 1 1 6 -50 -100 -20 -100 N
+P 2 1 1 6 -50 0 -20 0 N
+P 2 1 1 6 -50 100 -20 100 N
+X Pin_1 1 -200 100 150 R 50 50 1 1 P
+X Pin_2 2 -200 0 150 R 50 50 1 1 P
+X Pin_3 3 -200 -100 150 R 50 50 1 1 P
+X Pin_4 4 -200 -200 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Buzzer
+#
+DEF Device_Buzzer BZ 0 1 Y N 1 F N
+F0 "BZ" 150 50 50 H V L CNN
+F1 "Device_Buzzer" 150 -50 50 H V L CNN
+F2 "" -25 100 50 V I C CNN
+F3 "" -25 100 50 V I C CNN
+$FPLIST
+ *Buzzer*
+$ENDFPLIST
+DRAW
+A 0 0 125 -899 899 0 1 0 N 0 -125 0 125
+P 2 0 1 0 -65 75 -45 75 N
+P 2 0 1 0 -55 85 -55 65 N
+P 2 0 1 0 0 125 0 -125 N
+X - 1 -100 100 100 R 50 50 1 1 P
+X + 2 -100 -100 100 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C
+#
+DEF Device_C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_CP
+#
+DEF Device_CP C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_CP" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ CP_*
+$ENDFPLIST
+DRAW
+S -90 20 90 40 0 1 0 N
+S 90 -20 -90 -40 0 1 0 F
+P 2 0 1 0 -70 90 -30 90 N
+P 2 0 1 0 -50 110 -50 70 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_D
+#
+DEF Device_D D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "Device_D" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ TO-???*
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+P 2 0 1 10 -50 50 -50 -50 N
+P 2 0 1 0 50 0 -50 0 N
+P 4 0 1 10 50 50 50 -50 -50 0 50 50 N
+X K 1 -150 0 100 R 50 50 1 1 P
+X A 2 150 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_D_Zener
+#
+DEF Device_D_Zener D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "Device_D_Zener" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ TO-???*
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+P 2 0 1 0 50 0 -50 0 N
+P 3 0 1 10 -50 -50 -50 50 -30 50 N
+P 4 0 1 10 50 -50 50 50 -50 0 50 -50 N
+X K 1 -150 0 100 R 50 50 1 1 P
+X A 2 150 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_L
+#
+DEF Device_L L 0 40 N N 1 F N
+F0 "L" -50 0 50 V V C CNN
+F1 "Device_L" 75 0 50 V V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Choke_*
+ *Coil*
+ Inductor_*
+ L_*
+$ENDFPLIST
+DRAW
+A 0 -75 25 -899 899 0 1 0 N 0 -100 0 -50
+A 0 -25 25 -899 899 0 1 0 N 0 -50 0 0
+A 0 25 25 -899 899 0 1 0 N 0 0 0 50
+A 0 75 25 -899 899 0 1 0 N 0 50 0 100
+X 1 1 0 150 50 D 50 50 1 1 P
+X 2 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Jumper_Jumper_2_Bridged
+#
+DEF Jumper_Jumper_2_Bridged JP 0 0 Y N 1 F N
+F0 "JP" 0 75 50 H V C CNN
+F1 "Jumper_Jumper_2_Bridged" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Jumper*
+ TestPoint*2Pads*
+ TestPoint*Bridge*
+$ENDFPLIST
+DRAW
+A 0 -70 100 1269 531 0 1 0 N -60 10 60 10
+C -80 0 20 0 0 0 N
+C 80 0 20 0 0 0 N
+X A 1 -200 0 100 R 50 50 1 1 P
+X B 2 200 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Jumper_Jumper_2_Open
+#
+DEF Jumper_Jumper_2_Open JP 0 0 Y N 1 F N
+F0 "JP" 0 110 50 H V C CNN
+F1 "Jumper_Jumper_2_Open" 0 -90 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Jumper*
+ TestPoint*2Pads*
+ TestPoint*Bridge*
+$ENDFPLIST
+DRAW
+A 0 -30 100 1269 531 0 1 0 N -60 50 60 50
+C -80 0 20 0 0 0 N
+C 80 0 20 0 0 0 N
+X A 1 -200 0 100 R 50 50 1 1 P
+X B 2 200 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Sensor_Nuclear-Radiation_Detector
+#
+DEF Sensor_Nuclear-Radiation_Detector V 0 0 Y N 1 F N
+F0 "V" 200 50 50 H V L CNN
+F1 "Sensor_Nuclear-Radiation_Detector" 200 -50 50 H V L CNN
+F2 "" 200 100 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+A -125 135 16 -184 1084 0 1 0 N -110 130 -130 150
+A -205 135 16 -184 1084 1 1 0 N -190 130 -210 150
+A -175 125 16 1616 -716 1 1 0 N -190 130 -170 110
+A -165 95 16 -184 1084 1 1 0 N -150 90 -170 110
+A -165 175 16 -184 1084 1 1 0 N -150 170 -170 190
+A -135 165 16 1616 -716 1 1 0 N -150 170 -130 150
+C 0 0 111 0 1 0 N
+C 55 -35 10 0 1 0 F
+T 0 80 125 50 0 0 0 + Normal 0 C C
+P 2 0 1 0 -45 -60 45 -60 N
+P 2 0 1 0 -45 60 45 60 N
+P 2 0 1 0 0 -60 0 -100 N
+P 2 0 1 0 0 100 0 60 N
+P 4 0 1 0 -100 140 -120 120 -80 100 -100 140 F
+P 4 1 1 0 -140 100 -160 80 -120 60 -140 100 F
+X 1 1 0 200 100 D 50 50 1 1 P
+X 2 2 0 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Timer_TLC555xP
+#
+DEF Timer_TLC555xP U 0 20 Y Y 1 F N
+F0 "U" -400 350 50 H V L CNN
+F1 "Timer_TLC555xP" 100 350 50 H V L CNN
+F2 "Package_DIP:DIP-8_W7.62mm" 650 -400 50 H I C CNN
+F3 "" 850 -400 50 H I C CNN
+ALIAS LM555xN ICM7555xP LMC555xN MC1455P TLC555xP NA555P SE555P SA555P
+$FPLIST
+ DIP*W7.62mm*
+$ENDFPLIST
+DRAW
+S -350 -300 350 300 0 1 10 f
+S -350 -300 350 300 0 1 10 f
+X GND 1 0 -400 100 U 50 50 0 0 W
+X VCC 8 0 400 100 D 50 50 0 0 W
+X TR 2 -500 200 150 R 50 50 1 1 I
+X Q 3 500 200 150 L 50 50 1 1 O
+X R 4 -500 -200 150 R 50 50 1 1 I I
+X CV 5 -500 0 150 R 50 50 1 1 I
+X THR 6 500 -200 150 L 50 50 1 1 I
+X DIS 7 500 0 150 L 50 50 1 1 I
+ENDDRAW
+ENDDEF
+#
+# Transistor_BJT_BC328
+#
+DEF Transistor_BJT_BC328 Q 0 0 Y N 1 F N
+F0 "Q" 200 75 50 H V L CNN
+F1 "Transistor_BJT_BC328" 200 0 50 H V L CNN
+F2 "Package_TO_SOT_THT:TO-92_Inline" 200 -75 50 H I L CIN
+F3 "" 0 0 50 H I L CNN
+ALIAS BC556 BC558 BC559 BC560 BC327 BC328
+$FPLIST
+ TO?92*
+$ENDFPLIST
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 90 -70 70 -90 50 -50 90 -70 90 -70 F
+X C 1 100 200 100 D 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 I
+X E 3 100 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Transistor_BJT_BC517
+#
+DEF Transistor_BJT_BC517 Q 0 0 Y N 1 F N
+F0 "Q" 200 75 50 H V L CNN
+F1 "Transistor_BJT_BC517" 200 0 50 H V L CNN
+F2 "Package_TO_SOT_THT:TO-92_Inline" 200 -75 50 H I L CIN
+F3 "" 0 0 50 H I L CNN
+$FPLIST
+ TO?92*
+$ENDFPLIST
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 0 25 0 100 75 100 100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 50 -70 70 -50 90 -90 50 -70 50 -70 F
+X C 1 100 200 100 D 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 I
+X E 3 100 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# power_GND
+#
+DEF power_GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "power_GND" 0 -150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# power_VCC
+#
+DEF power_VCC #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -150 50 H I C CNN
+F1 "power_VCC" 0 150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 2 0 1 0 -30 50 0 100 N
+P 2 0 1 0 0 0 0 100 N
+P 2 0 1 0 0 100 30 50 N
+X VCC 1 0 0 0 U 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+# project_EzSBC_ESP32-01
+#
+DEF project_EzSBC_ESP32-01 U 0 40 Y Y 1 F N
+F0 "U" 0 900 50 H V C CNN
+F1 "project_EzSBC_ESP32-01" 0 750 50 H V C CNN
+F2 "" 0 900 50 H I C CNN
+F3 "" 0 900 50 H I C CNN
+DRAW
+S -850 1050 850 -1050 0 1 0 f
+X GND 20 -950 -950 100 R 50 50 0 0 W
+X GND 21 950 -950 100 L 50 50 0 0 W
+X Vin 22 950 -850 100 L 50 50 0 0 W
+X 3.3V 23 950 -750 100 L 50 50 0 0 w
+X GND 3 -950 750 100 R 50 50 0 0 W
+X 3.3V 32 950 150 100 L 50 50 0 0 w
+X Vin 37 950 650 100 L 50 50 0 0 W
+X GND 38 950 750 100 L 50 50 0 0 W
+X IO36 1 -950 950 100 R 50 50 1 1 I
+X IO25/RTC6 10 -950 50 100 R 50 50 1 1 B
+X IO26/RTC7 11 -950 -50 100 R 50 50 1 1 B
+X IO27/RTC17 12 -950 -150 100 R 50 50 1 1 B
+X n.c. 13 -950 -250 100 R 50 50 1 1 N
+X IO23/VSPI_MOSI 14 -950 -350 100 R 50 50 1 1 B
+X IO22/I2C_SCL 15 -950 -450 100 R 50 50 1 1 B
+X IO21/I2C_SDA 16 -950 -550 100 R 50 50 1 1 B
+X EN/Reset 17 -950 -650 100 R 50 50 1 1 I
+X 3.3V 18 -950 -750 100 R 50 50 1 1 w
+X Vin 19 -950 -850 100 R 50 50 1 1 W
+X IO39 2 -950 850 100 R 50 50 1 1 I
+X IO0/RTC11/Boot 24 950 -650 100 L 50 50 1 1 B
+X IO2/RTC12 25 950 -550 100 L 50 50 1 1 B
+X IO4/RTC10 26 950 -450 100 L 50 50 1 1 B
+X IO5/VSPI_SS 27 950 -350 100 L 50 50 1 1 B
+X IO12/RTC15/HSPI_MISO 28 950 -250 100 L 50 50 1 1 B
+X IO13/RTC14/HSPI_MOSI 29 950 -150 100 L 50 50 1 1 B
+X IO14/RTC16/HSPI_SCK 30 950 -50 100 L 50 50 1 1 B
+X IO15/RTC13/HSPI_SS 31 950 50 100 L 50 50 1 1 B
+X IO16/L1_RED 33 950 250 100 L 50 50 1 1 B
+X IO17/L1_GREEN 34 950 350 100 L 50 50 1 1 B
+X IO18/VSPI_SCK/L1_BLUE 35 950 450 100 L 50 50 1 1 B
+X IO19/VSPI_MISO/L2_BLUE 36 950 550 100 L 50 50 1 1 B
+X IO3/RX0 39 950 850 100 L 50 50 1 1 I
+X Vin 4 -950 650 100 R 50 50 1 1 W
+X IO1/TX0 40 950 950 100 L 50 50 1 1 O
+X IO35 5 -950 550 100 R 50 50 1 1 I
+X IO34 6 -950 450 100 R 50 50 1 1 I
+X IO33/RTC8 7 -950 350 100 R 50 50 1 1 B
+X IO32/RTC9 8 -950 250 100 R 50 50 1 1 B
+X 3.3V 9 -950 150 100 R 50 50 1 1 w
+ENDDRAW
+ENDDEF
+#
+# project_MPSA44
+#
+DEF project_MPSA44 Q 0 40 Y N 1 F N
+F0 "Q" 200 75 50 H V L CNN
+F1 "project_MPSA44" 200 0 50 H V L CNN
+F2 "Package_TO_SOT_THT:TO-92_Inline" 200 -75 50 H I L CIN
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+$ENDFPLIST
+DRAW
+C 50 0 111 0 1 10 N
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+ENDDRAW
+ENDDEF
+#
+#End Library
diff --git a/hardware/kicad/project/geiger/geiger.kicad_pcb b/hardware/kicad/project/geiger/geiger.kicad_pcb
new file mode 100644
index 0000000..02c8ecb
--- /dev/null
+++ b/hardware/kicad/project/geiger/geiger.kicad_pcb
@@ -0,0 +1 @@
+(kicad_pcb (version 4) (host kicad "dummy file") )
diff --git a/hardware/kicad/project/geiger/geiger.pro b/hardware/kicad/project/geiger/geiger.pro
new file mode 100644
index 0000000..152769c
--- /dev/null
+++ b/hardware/kicad/project/geiger/geiger.pro
@@ -0,0 +1,33 @@
+update=22/05/2015 07:44:53
+version=1
+last_client=kicad
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+BoardOutlineThickness=0.100000000000
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diff --git a/hardware/kicad/project/geiger/geiger.sch b/hardware/kicad/project/geiger/geiger.sch
new file mode 100644
index 0000000..5fef148
--- /dev/null
+++ b/hardware/kicad/project/geiger/geiger.sch
@@ -0,0 +1,1000 @@
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+EELAYER 30 0
+EELAYER END
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+Sheet 1 1
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+	8950 2900 8850 2900
+$Comp
+L Device:C C6
+U 1 1 60268467
+P 9650 2100
+F 0 "C6" V 9500 2100 50  0000 C CNN
+F 1 "100n" V 9800 2100 50  0000 C CNN
+F 2 "" H 9688 1950 50  0001 C CNN
+F 3 "~" H 9650 2100 50  0001 C CNN
+	1    9650 2100
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	9450 1650 9450 1750
+$Comp
+L power:GND #PWR015
+U 1 1 6026C1B5
+P 9800 2100
+F 0 "#PWR015" H 9800 1850 50  0001 C CNN
+F 1 "GND" V 9805 1972 50  0000 R CNN
+F 2 "" H 9800 2100 50  0001 C CNN
+F 3 "" H 9800 2100 50  0001 C CNN
+	1    9800 2100
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	10200 1750 10200 2150
+Connection ~ 9450 1750
+Wire Wire Line
+	8850 1750 9450 1750
+Wire Wire Line
+	8850 1750 8850 2900
+Wire Wire Line
+	9450 1750 10200 1750
+Wire Wire Line
+	9450 1750 9450 2100
+Wire Wire Line
+	9500 2100 9450 2100
+Connection ~ 9450 2100
+Wire Wire Line
+	9450 2100 9450 2300
+$Comp
+L Device:C C3
+U 1 1 6027E87B
+P 1850 2650
+F 0 "C3" V 1700 2650 50  0000 C CNN
+F 1 "100n" V 2000 2650 50  0000 C CNN
+F 2 "" H 1888 2500 50  0001 C CNN
+F 3 "~" H 1850 2650 50  0001 C CNN
+	1    1850 2650
+	0    1    1    0   
+$EndComp
+$Comp
+L power:GND #PWR010
+U 1 1 60280D56
+P 2000 2650
+F 0 "#PWR010" H 2000 2400 50  0001 C CNN
+F 1 "GND" V 2005 2522 50  0000 R CNN
+F 2 "" H 2000 2650 50  0001 C CNN
+F 3 "" H 2000 2650 50  0001 C CNN
+	1    2000 2650
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	1700 2650 1650 2650
+Connection ~ 1650 2650
+Wire Wire Line
+	1650 2650 1650 2800
+Wire Wire Line
+	2950 1400 2950 1650
+Text Notes 8750 1300 0    118  ~ 0
+Pulse Extension
+$Comp
+L Device:Buzzer BZ1
+U 1 1 60297F5A
+P 9600 5350
+F 0 "BZ1" H 9752 5379 50  0000 L CNN
+F 1 "Buzzer" H 9752 5288 50  0000 L CNN
+F 2 "" V 9575 5450 50  0001 C CNN
+F 3 "~" V 9575 5450 50  0001 C CNN
+	1    9600 5350
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR018
+U 1 1 6029AEBD
+P 9400 5500
+F 0 "#PWR018" H 9400 5250 50  0001 C CNN
+F 1 "GND" H 9405 5327 50  0000 C CNN
+F 2 "" H 9400 5500 50  0001 C CNN
+F 3 "" H 9400 5500 50  0001 C CNN
+	1    9400 5500
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	9500 5450 9400 5450
+Wire Wire Line
+	9400 5450 9400 5500
+Text GLabel 8850 5250 0    50   Input ~ 0
+PULSE-B
+$Comp
+L Jumper:Jumper_2_Open JP1
+U 1 1 6029F8D4
+P 9150 5250
+F 0 "JP1" H 9150 5485 50  0000 C CNN
+F 1 "Buzzer on" H 9150 5394 50  0000 C CNN
+F 2 "" H 9150 5250 50  0001 C CNN
+F 3 "~" H 9150 5250 50  0001 C CNN
+	1    9150 5250
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	9350 5250 9500 5250
+$Comp
+L Connector:Conn_01x02_Male J1
+U 1 1 602A360A
+P 9700 6100
+F 0 "J1" H 9672 5982 50  0000 R CNN
+F 1 "Pulse Out" H 9672 6073 50  0000 R CNN
+F 2 "" H 9700 6100 50  0001 C CNN
+F 3 "~" H 9700 6100 50  0001 C CNN
+	1    9700 6100
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	8850 5250 8950 5250
+Text GLabel 8850 6000 0    50   Input ~ 0
+PULSE-B
+$Comp
+L power:GND #PWR019
+U 1 1 602AAF13
+P 9400 6150
+F 0 "#PWR019" H 9400 5900 50  0001 C CNN
+F 1 "GND" H 9405 5977 50  0000 C CNN
+F 2 "" H 9400 6150 50  0001 C CNN
+F 3 "" H 9400 6150 50  0001 C CNN
+	1    9400 6150
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	8850 6000 9500 6000
+Wire Wire Line
+	9400 6150 9400 6100
+Wire Wire Line
+	9400 6100 9500 6100
+$Comp
+L Device:R R12
+U 1 1 602C68B9
+P 1650 6600
+F 0 "R12" V 1750 6600 50  0000 C CNN
+F 1 "3k3" V 1534 6600 50  0000 C CNN
+F 2 "" V 1580 6600 50  0001 C CNN
+F 3 "~" H 1650 6600 50  0001 C CNN
+	1    1650 6600
+	0    1    1    0   
+$EndComp
+$Comp
+L Device:D_Zener D5
+U 1 1 602C754E
+P 1900 6850
+F 0 "D5" V 1854 6930 50  0000 L CNN
+F 1 "3V3" V 1945 6930 50  0000 L CNN
+F 2 "" H 1900 6850 50  0001 C CNN
+F 3 "~" H 1900 6850 50  0001 C CNN
+	1    1900 6850
+	0    1    1    0   
+$EndComp
+Text GLabel 1300 6600 0    50   Input ~ 0
+PULSE-B
+Wire Wire Line
+	1300 6600 1500 6600
+$Comp
+L power:GND #PWR017
+U 1 1 602CD14A
+P 1900 7150
+F 0 "#PWR017" H 1900 6900 50  0001 C CNN
+F 1 "GND" H 1905 6977 50  0000 C CNN
+F 2 "" H 1900 7150 50  0001 C CNN
+F 3 "" H 1900 7150 50  0001 C CNN
+	1    1900 7150
+	1    0    0    -1  
+$EndComp
+$Comp
+L project:EzSBC_ESP32-01 U1
+U 1 1 602D4760
+P 3650 6150
+F 0 "U1" H 3650 7365 50  0000 C CNN
+F 1 "EzSBC_ESP32-01" H 3650 7274 50  0000 C CNN
+F 2 "" H 3650 7050 50  0001 C CNN
+F 3 "" H 3650 7050 50  0001 C CNN
+	1    3650 6150
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	1800 6600 1900 6600
+Connection ~ 1900 6600
+Wire Wire Line
+	1900 6600 2700 6600
+Wire Wire Line
+	1900 6600 1900 6700
+Wire Wire Line
+	1900 7000 1900 7150
+$Comp
+L Device:C C8
+U 1 1 6032AB87
+P 5050 6950
+F 0 "C8" H 5165 6996 50  0000 L CNN
+F 1 "100n" H 5165 6905 50  0000 L CNN
+F 2 "" H 5088 6800 50  0001 C CNN
+F 3 "~" H 5050 6950 50  0001 C CNN
+	1    5050 6950
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:CP C9
+U 1 1 6032EF00
+P 5800 6950
+F 0 "C9" H 5918 6996 50  0000 L CNN
+F 1 "1000u" H 5918 6905 50  0000 L CNN
+F 2 "" H 5838 6800 50  0001 C CNN
+F 3 "~" H 5800 6950 50  0001 C CNN
+	1    5800 6950
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4600 6800 5050 6800
+Wire Wire Line
+	4600 6900 4750 6900
+Wire Wire Line
+	4750 6900 4750 7100
+Wire Wire Line
+	4750 7100 5050 7100
+Connection ~ 5050 7100
+$Comp
+L power:GND #PWR020
+U 1 1 60339CCE
+P 5050 7150
+F 0 "#PWR020" H 5050 6900 50  0001 C CNN
+F 1 "GND" H 5055 6977 50  0000 C CNN
+F 2 "" H 5050 7150 50  0001 C CNN
+F 3 "" H 5050 7150 50  0001 C CNN
+	1    5050 7150
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5050 7100 5050 7150
+Wire Wire Line
+	5800 7100 5050 7100
+$Comp
+L power:VCC #PWR021
+U 1 1 6033D2F0
+P 5800 6350
+F 0 "#PWR021" H 5800 6200 50  0001 C CNN
+F 1 "VCC" H 5815 6523 50  0000 C CNN
+F 2 "" H 5800 6350 50  0001 C CNN
+F 3 "" H 5800 6350 50  0001 C CNN
+	1    5800 6350
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2700 5700 2450 5700
+$Comp
+L Jumper:Jumper_2_Bridged JP2
+U 1 1 60343981
+P 2250 5700
+F 0 "JP2" H 2250 5895 50  0000 C CNN
+F 1 "WLAN on" H 2250 5804 50  0000 C CNN
+F 2 "" H 2250 5700 50  0001 C CNN
+F 3 "~" H 2250 5700 50  0001 C CNN
+	1    2250 5700
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5050 6800 5200 6800
+Connection ~ 5050 6800
+Wire Wire Line
+	5600 6800 5800 6800
+Wire Wire Line
+	5800 6800 5800 6350
+Connection ~ 5800 6800
+$Comp
+L Jumper:Jumper_2_Bridged JP3
+U 1 1 6035A20F
+P 5400 6800
+F 0 "JP3" H 5400 6995 50  0000 C CNN
+F 1 "VCC to uC" H 5400 6904 50  0000 C CNN
+F 2 "" H 5400 6800 50  0001 C CNN
+F 3 "~" H 5400 6800 50  0001 C CNN
+	1    5400 6800
+	1    0    0    -1  
+$EndComp
+Text Notes 4850 6500 0    50   Italic 0
+(!) WARNING (!)\nDO NOT CLOSE\nWHEN POWERED FROM\nBOTH USB AND VCC
+$Comp
+L Connector:Conn_01x04_Female J2
+U 1 1 60363882
+P 5250 4950
+F 0 "J2" V 5200 5200 50  0000 R CNN
+F 1 "I2C OLED 128x64 with SH1106" V 5350 5400 50  0000 R CNN
+F 2 "" H 5250 4950 50  0001 C CNN
+F 3 "~" H 5250 4950 50  0001 C CNN
+	1    5250 4950
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	2700 6900 2550 6900
+Wire Wire Line
+	2550 6900 2550 7450
+Wire Wire Line
+	2550 7450 4750 7450
+Wire Wire Line
+	4750 7100 4750 7450
+Connection ~ 4750 7100
+Wire Wire Line
+	5150 5300 5150 5150
+Wire Wire Line
+	5450 5600 5450 5150
+Wire Wire Line
+	4600 5700 5350 5700
+Wire Wire Line
+	5350 5700 5350 5150
+$Comp
+L power:GND #PWR022
+U 1 1 6038B23D
+P 5250 5350
+F 0 "#PWR022" H 5250 5100 50  0001 C CNN
+F 1 "GND" H 5255 5177 50  0000 C CNN
+F 2 "" H 5250 5350 50  0001 C CNN
+F 3 "" H 5250 5350 50  0001 C CNN
+	1    5250 5350
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5250 5150 5250 5350
+Text Notes 5550 5100 0    50   Italic 0
+pin layout depends \non used module
+Text Notes 1000 5250 0    118  ~ 0
+ESP32\nMicrocontroller
+Text Notes 8800 4800 0    118  ~ 0
+Outputs
+$Comp
+L Device:R R13
+U 1 1 603B2486
+P 4900 5450
+F 0 "R13" H 4970 5496 50  0000 L CNN
+F 1 "4k7" H 4970 5405 50  0000 L CNN
+F 2 "" V 4830 5450 50  0001 C CNN
+F 3 "~" H 4900 5450 50  0001 C CNN
+	1    4900 5450
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4600 5600 4900 5600
+Wire Wire Line
+	4600 5300 4900 5300
+Connection ~ 4900 5300
+Wire Wire Line
+	4900 5300 5150 5300
+Connection ~ 4900 5600
+Wire Wire Line
+	4900 5600 5450 5600
+Text Notes 1550 4500 0    236  ~ 0
+CIRCUIT SKETCH NOT YET CHECKED FOR MISTAKES!
+$EndSCHEMATC
diff --git a/hardware/kicad/project/geiger/sym-lib-table b/hardware/kicad/project/geiger/sym-lib-table
new file mode 100644
index 0000000..e00e9ea
--- /dev/null
+++ b/hardware/kicad/project/geiger/sym-lib-table
@@ -0,0 +1,3 @@
+(sym_lib_table
+  (lib (name project)(type Legacy)(uri C:/dev/git/esp32-geiger-counter/hardware/kicad/lib/geiger.lib)(options "")(descr ""))
+)
diff --git a/media/kicad-circuit-sketch.png b/media/kicad-circuit-sketch.png
new file mode 100644
index 0000000..e066643
Binary files /dev/null and b/media/kicad-circuit-sketch.png differ