[Lab] Voltage Regulators
micro222 at yahoo.com
Sat Jan 25 16:18:20 EST 2014
I had that problem recently and found an elegant solution. There's a tiny switching regulator module that replaces the 7805. It delivers up 1.5 amps and doesn't get warm regardless of the input voltage. It's only $5.15 and available at Digikey. I have a spare if you don't want to place an order. The Digikey part number is 811-2196-5-ND.
On Sat, 1/25/14, Justin Slootsky <justin at slootsky.org> wrote:
Subject: [Lab] Voltage Regulators
To: lab at artengine.ca
Received: Saturday, January 25, 2014, 10:17 AM
I'm new to electronics, so newbie
simple answers are quite possibly appropriate.
I have a project that needs 12V for LEDs and 5V to power the
BeagleBone that is driving the LEDs.
I'm using a LM7805C to regulate the voltage down from 12V to
5V, and it is functioning well, but it is getting hot.
I added a binder clip to act as a heat sync, but still,
depending on where I'm measuring, I can get a temperature
reading of up to 80C.
My final plan for this would be to encase the
wiring/circuitboard in some sort of container, so that type
of temperature is not going to be suitable.
I have read that there are other types of voltage regulators
(switching regulator?) that can be used in scenarios like
this, but I'm not sure where to source just one of
those. The only local walk in source for electronics
that I've found is Active Electronics, and they don't seem
to have much (and much of what they have seems expensive).
Is there anywhere local that I can find a voltage regulator
that is going to run cooler than this one?
[ I'm still at breadboard stage, so it doesn't need to be
the same formfactor as the LM7805C ]
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