Frequency Meter Stripboard Layout

I built this as a rough frequency meter to make sure a bunch of oscillators were oscillating in the right ballpark frequency.
it uses the lovely 555 timer IC.

it responds best to squarewave signals (maybe triangle too, I forgot to test it with triangle waves)

Quick And Dirty Laser Driver Stripboard Layout

This was just a quick little circuit I built to test all the salvaged CD/DVD lasers I have.
essentially it is a adjustable constant current power supply.

the Vin is 7.2 volts.