[Lab] Voltage Regulators

Micro 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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