Digital recorder ISD1016 (CB7963E)

Found in a Popular Electronics from the 90s, this digital recording circuit uses an unusual integrated circuit today.

DA14680 and DA14681 SmartBond ™ Wearable on Chips ™ (COM076E)
August 2016 - It can be purchased from Mouser Electronics new chips from Dialog Semiconductor, the...
CB11214E Photo SCR ()
With this circuit it is possible to fire an SCR from the light that falls on a phototransistor. The circuit...
Radio Metronome (CB14782E)
Interval pulses emitted by this circuit are picked up in a medium wave radio nearby. The circuit is...