Found in an Australian documentation from 1991, this circuit was sold in a kit at the time. It is a small FM transmitter with a very common configuration, also found in other projects on this site.
August 2017 - Microchip's new ATtiny1617 8-bit AVR microcontrollers running at 20 MHz and 16 kB...
Found in a 1970 American publication, this circuit uses transistors of the time. These transistors...
May 2017 - Panasonic's new APS1 series of optical couplers with 3 750 V insulation and up to 50...