Found in a 90’s Popular Electronics, this circuit uses two CMOS inverters to generate a signal of a few hundred hertz determined by C1 and the R3 setting.
Developed by Philips this 60's circuit uses a transistor of the time, but the configuration holds true for...
This simple AM transmitter for very small ranges uses in the original version of the 1970s, a...
We found this circuit in a 1960 Sylvania transistor manual. The relay can be 12 V and C1...