This circuit was found in the October 1987 Radio Electronics magazine. The circuit is a PWM control with a 555. It appears that the 555 is missing a connection that would be pin 4.
August 2017 - The PIC32MM microcontrollers of the Microchip 32-Bit Family can be obtained from...
This circuit was found in a 80s American documentation. The zener diodes determine the points of...
This circuit monitors the state of a 12 V battery and can be used directly with one, or even in a...