Fan speed controller. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Computers
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The scheme below provides simple fan speed control without speed control. The device uses domestic transistors KT361 and KT814. Structurally, the board is placed directly in the power supply, on one of the radiators and has additional seats for connecting a second sensor (external) and the ability to add a zener diode that limits the minimum voltage supplied to the fan.
Rice. 1. Schematic diagram of the regulator.
Rice. 2. Appearance and topology of the printed circuit board.
Publication: cxem.net
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