I found similar units for less on AliExpress and eBay. Not at my desk right now so do not have the links.?
One note: you can use the adjustable resistors to change the voltage level with a 27kOhm resistor across the input to the ATtiny85. ?The bridges I ordered were made to connect to an analog meter and used to adjust the current. Mid range gave me 2.8volts with 40watts from the switch ?
73
Evan
AC9TU
