MTCH101 – Single-Channel Proximity Detector  Demo and Hookup

My values are a bit different – probably because I was out of 10Ks.  These are all 5% standard resistors.   Running 220 on the LED, because of the LED I’m using.  Unclear in video what power supply I used, but when dusting this off in Dec 2020, I used a 5v @ 1amp USB Charger – which read ~5.2v without load.

The Proximity Sensor is just a wire here, and the type of wire, amount of insulation, length, affects all kinds of stuff.