56KΩ .1uF .1uF 1KΩ DIY Geiger Counter Geigetbot Settings: Auto-Adjust: OFF RMS Window: 1 Delay Window: 18 Volume Threshold: 20000 Sample Rate: 22050 Disable Measurement Mode: OFF Hysteresis Filter: 0 Input Polarity: Negative Only Wavelet Filter: OFF Input Gain Control: 1.00 Ultrafast Rates: OFF Adding this wire and Cap to the LED+ output will create audible clicking heard by any standard headphones or amplifier GK5 Geiger Board To iPhone or iPad To Android phone