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Holger Fleischmann
2021-03-07 17:33:05 +01:00
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@@ -18,7 +18,7 @@ Feel free to use this project as a base for your own projects AT YOUR OWN RISK!
- Russian Geiger counter tube STS-6 (CTC-6) at 400 V with ~5 MΩ series resistor - Russian Geiger counter tube STS-6 (CTC-6) at 400 V with ~5 MΩ series resistor
- High voltage circuit from ArnoR at mikrocontroller.net https://www.mikrocontroller.net/topic/380666, schematic https://www.mikrocontroller.net/attachment/273334/HystereseStepUpTLC555-2.png. *Keep the high-voltage capacitor small to avoid dangerous charges! For safety avoid any contact with the high voltage parts!* - High voltage circuit from ArnoR at mikrocontroller.net https://www.mikrocontroller.net/topic/380666, schematic https://www.mikrocontroller.net/attachment/273334/HystereseStepUpTLC555-2.png. *Keep the high-voltage capacitor small to avoid dangerous charges! For safety avoid any contact with the high voltage parts!*
- ~400 µs pulse generation using Geiger tube series resistors as voltage divider, high impedance input to darlington transistor and TLC 555 timer for rectangle pulse generation (schematic and pulses see below) - ~400 µs pulse generation using Geiger tube series resistors as voltage divider, high impedance input to darlington transistor and TLC 555 timer for rectangle pulse generation (schematic and pulses see below)
- ESP32 board Wemos Lolin32 - ESP32 board EzSBC ESP32-01
- OLED 128x64 with controller SH1106 at I2C - OLED 128x64 with controller SH1106 at I2C
- Voltage supply from either USB or power supply or 3x 1.5V AAA batteries, circuit works stable from 3.0 V up to 5.0 V - Voltage supply from either USB or power supply or 3x 1.5V AAA batteries, circuit works stable from 3.0 V up to 5.0 V
- Pulse input is expected at GPIO 15 (high pulses with at least about 250 µs length) - Pulse input is expected at GPIO 15 (high pulses with at least about 250 µs length)