Dual Dual Op-Amps!

The LM358 dual op-amps finally arrived today - both types! So I now have oodles of both DIL-8 and SOIC-8 dual op-amps to play with!

The first three of the battery warning modules now have their IC mounted. Im still waiting for the higher value 0603 chip resistors though, so cannot complete and test them just yet.

Nearly...

What I can do though now is rejig the breadboard prototype with an LM358 and test the system on that, which will allow me to find the most appropriate values for the sense resistors RA and RB. I do expect the values to be a little different than the LM741 circuit, but the biggest variation will be down to which of the standard values gives the closest threshold to the desired 20V.

Some of you reading this may also be aware of the sad passing of Rev George Dobbs G3RJV recently. The G-QRP club have set up a tribute fund on behalf of the Alzheimers Society, if you wish to make a donation https://george-dobbs.muchloved.com/