This circuit transmits in the FM band. It is a good range FM transmitter found in a 90's Silicon Chip documentation. The integrated circuit used can be difficult to obtain.
It is like to the previous circuit with a lock that keeps the LED on at the end of the timer. The...
Found in old documentation, this circuit makes use of amplifiers of the time, uncommon today. Next...
This full-wave circuit was obtained in Motorola's 1974 unijunction transistors manual. The circuit...