From d941f630d2d380660c751282b2823b7f8e85b5c7 Mon Sep 17 00:00:00 2001 From: Holger Fleischmann <33845511+grillbaer@users.noreply.github.com> Date: Sun, 14 Apr 2019 18:37:53 +0200 Subject: [PATCH] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 8e918c8..0fd0314 100644 --- a/README.md +++ b/README.md @@ -12,7 +12,7 @@ Feel free to use this project as a base for your own projects AT YOUR OWN RISK! # Hardware - Russian Geiger counter tube STS-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!* +- 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 - ESP32 board Wemos Lolin32 - OLED 128x64 with controller SH1106 at I2C