Push pull receiver (CB22275E)

This circuit from the 60's uses germanium transistors of the time. Listening is done on high impedance headphones.

Pass Through Alarm (CB15919E)
In the figure we show how to excite a CMOS port by interrupting light on a Darlington...
Didactic Comparator (CB1431E)
With this circuit, of a 1977 Radio Shack documentation, it is possible to demonstrate the...
Barometer (CB7068E)
Found in an Electronic Design from the 90s, this circuit makes use of contemporary components,...