Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Tuesday, April 26, 2011

Breadboard Power Supply

Here is a great addition to you bread boarding tools, a breadboard power supply. This is a follow up on my video on how to breadboard.

This plugs directly into a standard breadboard and proved power on the rails on each side. Can be adjusted from 1.3V to 15V DC. This is a great first project, infact this is the first project our incoming 9th Grade students build.

Compact Linear Breadboard Power Supply

This project details the design of a adjustable power supply. A good power supply is essential to electronic projects. While there are many existing designs for adjustable power supplies, this one makes improvements that make it more useful for hobby designs

* LM317 regulator has guaranteed 1.25A output
* 1.25V Dropout Voltage
* Short circuit and overheating protection
* Input diode to protect circuitry from negative voltages or AC power supplies.
* 2.1mm DC jack voltage inputs
* Two indicator LEDs for high and low voltages
* Onboard pot for adjusting voltage from 1.25V up 20V
* Heat sink