Pulse Pendulum Projects

[PhiChaser]

Hello whoever, just a quick note.
I've built several pendulums and the couple I have had sitting on my bookshelf will swing to-and-fro for a couple months (at least) on a single battery! I've let those two run down to a motionless state and I can give them a push that will set them swinging again for hours (sometimes). Also they will self start when the temperature goes up (like today when it is 90f ugh...) and go all day long until the temp drops back down again... Neat!
Cheers!

[Paul-R]

Ah, beauty! I love that particular era of circuit board layout.

It reminds me of analogue circuits, in particular, some of the old valve high quality audio work.