I’ve been working on a circuit revision of my 555 based fuel injector tester. I’ve added a few things to the circuit to make it a little more versatile. Now there’s a switchable output duration of either 1 or 5 seconds and a switch that allows continuous output if the trigger is held closed. I’ve also fabricated a new PCB and spent a bit of time last evening soldering up the components to the board.
This weekend I’ll add the switches and LEDs then install into a new enclosure with some better test leads and it will be ready for use.
I’m entering this in the upcoming 555 contest in the “utility” category where I think it will be well received.