would like suggestions on using some type of thermo switch to cool a 2 meter radio heat sink.
I have some 12 volt 40mm x 40mm cooling fans that I would like to use to help cool the heat sink
but don't want them running all the time.
Thanks for any help
Moe
thermo switch / control
Re: thermo switch / control
A simple thermo switch like the one in this photo might work. Check out Amazon.com they have a bunch listed with all kinds of temperature ranges.
Steve G
Steve G
Re: thermo switch / control
You can canibalize a defunct/discarded PC power supply and salvage its fan and control circuit with thermistor.
Most modern supplies have variable fanning controlled by temperature, with a circuit board independent from its main board. And it is 12VDC. And nearly $0. And will work only when hot. And quiet.
Most modern supplies have variable fanning controlled by temperature, with a circuit board independent from its main board. And it is 12VDC. And nearly $0. And will work only when hot. And quiet.
- Abolish the deciBel ! -
- dacflyer
- Posts: 4749
- Joined: Fri Feb 08, 2002 1:01 am
- Location: USA / North Carolina / Fayetteville
- Contact:
Re: thermo switch / control
Externet >> that fan control.. is it just on and off or is it variable ??
Re: thermo switch / control
Variable speed. I have collected/salvaged several of those boards with a thermistor from inside PC supplies, all about 1" x 1" that feed the fan from whisper quiet to full speed.
- Abolish the deciBel ! -
- dacflyer
- Posts: 4749
- Joined: Fri Feb 08, 2002 1:01 am
- Location: USA / North Carolina / Fayetteville
- Contact:
Re: thermo switch / control
thanks,, i'll start digging in the dumpsters for them
Re: thermo switch / control
thanks for the tips
Moe
Moe
Re: thermo switch / control
you can also find some fan controls in a computer store. Most of these work with the 3 wire fans and some have thermocouples and indicators etc. There is a range of features you can choose from. I searched on "PC Fan Controller" and found many from $8 to $100
The thermostat would be the cheapest and smallest way if you don't care about settability.
The thermostat would be the cheapest and smallest way if you don't care about settability.
- dacflyer
- Posts: 4749
- Joined: Fri Feb 08, 2002 1:01 am
- Location: USA / North Carolina / Fayetteville
- Contact:
Re: thermo switch / control
i dug into about 6 SMP's and only 1 of them had that lil fan control board with the thermister.
i tested it out, and it is only a 2 speed controller, not variable speed..
it turns on low, then when it gets hot, it kicks into high gear, til it cools off.
i'd like to find a circuit that would be a true variable speed control..adjustable of course..
i tested it out, and it is only a 2 speed controller, not variable speed..
it turns on low, then when it gets hot, it kicks into high gear, til it cools off.
i'd like to find a circuit that would be a true variable speed control..adjustable of course..
Who is online
Users browsing this forum: No registered users and 56 guests