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Search results: pulse

Pulse/Heartbeat Sensor

This is a heartbeat / pulse / PSO2 sensor based on a Silicon Labs Si1143 chip. The chip wasn’t exactly designed for a pulse sensor but since we developed this…

HC-SR04 Distance Sensor

These are low-cost Chinese ultrasonic (sonar) distance sensor. They work by outputting an ultrasonic pulse and waiting for a return pulse (echo). They don’t have a lot of the features…

PIR Sensor

…lights and burglar alarms everywhere. The output of this particular model produces a double pulse when activated and then stays high for a time period set by the delay pot….