Here is a simple mod to allow the speed of any 12V fan to be varied. All we need to do is insert a rheostat or variable resistor in the 12V wire to the fan. The rheostat should be rated at least 3 ...

I have a Darlington transistor to keep cool. It is a lovely chunky TIP147 in a TO247 package, attached to a PC heatsink (£6 from ebay) to get the heat out. PC heatsinks are great as they often include ...

Fan-Tastic Vent’s Endless Breeze portable 12-volt fan features a 12-inch blade and operates at three speeds. It is 14 inches high on retractable legs and less than 3 inches thick. It can be powered by ...

I was pondering possible interfaces between a microcontroller and a 12 or 24V 5015 blower fan. The challenge is that the MCU can only drive 3.3 or 5V, while the blower needs needs a voltage as low as ...

My new home theatre receiver was getting rather hot in the close confines of its cabinet, with the temperature reaching over 40°C after only about 30 minutes of use. To help lower the temperature, I ...

This circuit idea is certainly not new, but when it comes to making a trade-of between using a small, short-circuit proof transformer or a capacitive voltage divider (directly from 230 V mains voltage ...

i have looked all over online and have checked radio shack and jameco,<BR>but cannot find potentiometers that are of sutable wattage.<P>speaking of wattage , what would be the correct specifications ...

Diodes Inc.has announced the introduction of a pair of all-in-one single-phase 12 V fan motor drivers for low to medium voltage brushless DC fan control in consumer, home appliance, industrial and ...

Serial would mean the +V of one fan is connected to the Gnd of the next, and assuming each fan is identical, each fan would only get a fraction of 12V (2 fans @ 6V each might make them spin slowly, ...