SLVR-1 Power Supply



8.50 USD
$8.50 ea.

It's a handy power-breakout, featuring barrel-jack input, and multiple 5V regulated, unregulated, and USB-compatible power taps.

Description [Hide]

It looks like a generic power board, and it is. And it's surprisingly useful one at that.

Feed it 8~20VDC in, and then get convenient 5V access through 8-pairs of +/- pins, and a USB jack configured with bias resistors for "iDevice" charging. And there's taps for 4 pairs of unregulated (Vsource) power. With a power switch.

Besides being a handy project power-supply, we've successfully used it as a remote power center for a Synapse Radio / Star Controller demonstration board, which it was ideal for. We pushed 12V into the power board, sent the regulated 5V to the logic controller board, and passed the 12V directly to the LEDs, all from the same board. AND we still had the USB A power jack for powering an Arduino demonstration.


  • 1A LM7805 regulator with internal short-circuit current limit, and reverse installation protection
  • AC/DC input power supply compatible (polarity insensitive inputs due to the included diode bridge rectifier)
  • Multiple Power Inputs via:
    • 2.1mm Barrel Jack
    • .200" Holes ideal for terminal blocks, or large gauge wire soldering
    • 2x4 .100" header for either male or female header pins.
  • Multiple output Outputs via:
    • 1 x .200" Hole pair, ideal for terminal blocks, or large gauge wire soldering
    • 2x8 .100" Header for either male or female header pins to be used. Lots of connection points!
  • Power switch - turn the power supply off for battery powered projects
  • LED power indicator
  • USB A socket - Power your USB devices (such as your Arduino) directly from the power supply with a standard USB cable.
  • iDevice-compatible charge-enable circuitry


  • Typical Input Voltage Range: 8-12VAC/VDC (bridge rectifier can be bypassed to enable use of lower 6VDC input power)
  • Maximum Input Voltage: 20VDC
  • Output Voltage: 5VDC
  • Output Current: In excess of 1A (Higher input voltages reduce maximum output current)

This unit is modifiable for additional performance - add a bigger heatsink for supplying higher current. Or replace the IC for different voltages, or to utilize a high-efficiency switching voltage regulator!

Available exclusively at Solarbotics!

You Might Also Like [Hide]

Breadboard Jumper Wire Bundle


This 70-piece flexible wire jumper kit is sure to replace your old-style solid-wire jumpers. These are more flexible, robust, and easy to use!

$6.00 USD

PN2222 NPN Transistor


This NPN transistor is similar to the TR3904, but can deliver higher maximum current at better efficiency ratings.

$0.15 USD

470 ohm Resistor


5% accuracy 1/4 watt resistors to get you started with your BEAM experiments.

$0.20 USD

5V Positive Voltage Regulator


The ST Micro L7805CV is a 1.5A, 5V positive linear regulator. It is the stronger older brother of the 78M05 but ironically it is the same size and shape, go figure. It may look like your everyday 7805 but looks can be deceiving!

$0.40 USD

Barrel Jack Extension Cable - M-F (6 ft)


It's great for that DC adapter you found with the too-short cable. Plug this 6' extension in, and you're good to go.

$1.95 USD

SparkFun Barrel Jack Power Switch - M-F


Instead of yanking and plugging 2.1" power connectors, toggle the power with this short inline power switch.

$2.50 USD

DC-DC 2A Adjustable Boost Power Supply Converter Step Up Module 2-24v


This budget DC-DC boost converter cranks up input voltage from as low as 2V to an output as high as 28VDC

$3.95 USD

Breakout Board for FT232RL USB to Serial


Basic breakout board for FTDI's popular USB to UART IC. Now with internal oscillator and EEPROM, the FT232RL is an impressive IC!

$14.95 USD

Engineer's Mini Notebook (VOL III)


Volume III of the Forrest Mims Engineer's Mini Notebook series includes three of his best-selling notebooks devoted to sensors: Sensor Projects; Solar Cell Projects; and Magnet Sensor Projects.

$12.95 USD

Solarbotics Raspberry SAFE


So your much anticipated Raspberry Pi board has arrived, you'll want to protect your precious! Use the Raspberry SAFE to protect it from the harmful environment that is your desk or TV stand.

$8.95 USD





Remember Me

Forgot Your Password?

Don't Have an Account?
Sign Up!