This circuit is from an Electronics World of 1967. The described calculations can be applied to equivalent circuits with modern transistors.
April 2017 - The kit for STMicroelectronics STM32F7 32-bit microcontrollers is available from...
Bike speedometer (CB20497E) This circuit can be powered by a solar cell. The circuit is from a...
The integrated circuit used in this project is not common today, but it can be implemented with more...