The transistors for this project from a 1992 magazine can be BC548 or BC549 and the diode can be 1N4148. The LED can be of any type and the RV1 trimpot adjusts the trigger voltage.
This 2005 circuit was found in an English publication and can be implemented with virtually any...
This circuit was found in the February 1990 issue of Radio Electronics magazine. The gain is given...
August 2017 - Microchip's new ATtiny1617 8-bit AVR microcontrollers running at 20 MHz and 16 kB...