This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
April 2017 - The kit for STMicroelectronics STM32F7 32-bit microcontrollers is available from...
This traditional unijunction transistor configuration was found in a 1980s documentation. The functions are...
This different configuration for a crystal galena radio or modernized since a diode is used, has a...