This circuit uses only transistors and was found in a 2003 documentation. Transistor 2N3055 must be mounted on a heat sink and the voltage is set to R10.
This circuit allows linear brightness control of an LED from an input voltage. The power supply must...
With this system you can disconnect phone lines in case of need for protection. The circuit is...
The integrated circuit used in this 80's mixer is the LM301A. However the circuit can be used to...