Hello all. I have a HC-05 bluetooth module and a sound sensor (SEN-12642) connected together on my breadboard's power rails along with an IR sensor.
Based on my research because there's one ground on the BT module putting 3.3v into my ground power rail I get voltage noise. The issue is that this causes the sound sensor to trigger incorrectly.
I've tried to mitigate this by:
- Decoupling the sound sensor using a 100nf and a 100uF capacitor.
- Decoupling the BT module using a 100nf and a 100uF capacitor.
- Star grounding
- Powering the sound sensor off a different power supply
- Powering the BT module off a different power supply
and nothing has worked. Does anyone know what else I can do in this situation?
Wiring link (before my attempts above): Sound Detector/Bluetooth Circuit - Album on Imgur