The module in question is a CDM324 24-GHz board that’s currently listing for $12 on Amazon. ... 22 thoughts on “ The Right Circuit Turns Doppler Module Into A Sensor ” limpkin says: ...

Schematic of IR Beam Breaker Circuit. TSOP1738 IR sensor module responds to only 38 kHz pulsed infrared rays. It will not sense continuous IR ray from the IR LED. So a transmitter circuit(as one in TV ...

The PCB should made with 2-oz copper to reduce unnecessary power loss in the circuit board. Photograph of a readymade ACS712 current sensor module is included here as an example. current sensor module ...