AT&T 123a Tone Dialer CIC9145e Circuit Board
Tone dialer
CIC9145e IC chip












Square to Triangle Wave Converter
Slot Car Build, with 5 video parts:
Part 1:
This is the finished chassis (shown upside down). It is on the jeweler's board, which is used for mocking up and soldering things. There are holes and movable pins to hold things in place.
I build a 1/24 scale slot car chassis by soldering brass pieces. Here is the purchase list from Slot Car Corner:
Inventing (and building) the Van Rocker!
It's a lock pick unlocker for the Vanlock company lock.
This is the lock: