Fan speed control circuit 4 bc639 transistors are used on the circuit speed can be adjusted with potentiometer 47k. Intel CPU fan circuit used in the circuit tests based on phenolic hole about a new simple circuit for the low cost ..
Source: http://www.soloelectronica.net/fan_espeed_control.html
Published: 2011/10/29 Tags: analog circuits projects, simple circuit projects
500W Power Amplifier Circuit Apex B500
Apex B500 power amp’s pcb design stylish been output mje15032 and mje1503 power transistors used supply voltage symmetrical 55v … 90V from quite high dangerous circuit tests, be careful addition amphitheater to be used with fan control and protection circuit diagrams and PCB drawing is on.