My turn for help with Pulse multiplier for test rig.

[Neale]

...and the only reason that the Arduino-based approach fails to meet the cost criterion is because people think of buying a complete Arduino board. But an Atmega chip only costs a couple of quid (for one of the smaller dual-inline versions) and if someone could develop the code and burn the odd chip or two, it would barely cost more than a 555 with a couple of switches and a pot. In fact, it's the reason that the simpler microprocessors were developed in the first place, to avoid boards full of logic chips. I took this approach recently with a soldering iron temperature controller, but I have too many projects on the go already to put my hand up for this one, I'm afraid. So, watching with interest to see what turns up!

Ex-G8BYK, now G4FBN, and wondering how it would have been done in thermionic valve days...