The output of the ACS712 has a positive slope (>VIOUT(Q)) when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for .

The idea is simple enough: just place a INA219 current sensor between the power supply ... Of course in this case, [Mark] knew what the target Arduino Nano was doing because he wrote the code ...

I recently had to build an infrared close proximity sensor ... Arduino Uno (TP2). See a couple of random oscillograms below. Thus, the infrared emitter transmits bursts of 38kHz infrared signal ...

[Flux Axiom] is using an Arduino Mega in his setup along with a cornucopia of sensors and all their data is being logged onto an SD card. All the code used in ... 3 is his current solution and ...