Tools / Test Equipment / Power Supply & Monitor

Put a voltage meter anywhere with this very handy display. This panel meter simply connects to whatever DC supply you are trying to track, easy to wire up! Simply connect the red wire to the positive supply, and black to negative ground. The display has a microcontroller that will read the voltage, compare it to a stable reference and display the voltage with 0.1V...

Put a voltage meter anywhere with this very handy display. These are often used by RC hobbyists for keeping track of batteries but we thought it would be great on a breadboard or enclosure. This is the 3-wire version of the volt meter, two wires are used to power it and the third wire is used for measurement. We also have a 2-wire version that measure it's own power...

Put a temperature meter anywhere with this very handy display. This panel meter displays the temperature of the attached waterproof 1% thermistor in °C. It does require a DC voltage to run, at 4.5-30VDC. It has reverse polarity protection in case you swap the power leads by accident. To use, simply connect the thin red wire to a positive supply, and the thin...

Here is a handy measurement data display to help you see in real time the load flowing into your devices as they charge via USB-C. You'll have immediate readings of voltages, amps, and watts along with their peaks. This Tootsie Roll-sized power meter has a small OLED display (18mm x 10mm) that shows off voltage, watts, amps, and mAh and instantly reads the numbers...

Put a voltage meter anywhere with this very handy display. These are often used by RC hobbyists for keeping track of batteries but we thought it would be great on a breadboard or enclosure. This is the 2-wire version of the volt meter, two wires are used to power it and measure at the same time. We also have a 3-wire version that measure a wider range of voltages....

Put a current meter anywhere with this very handy display. This panel meter requires a DC voltage to run, and then has two thick gauge wires to measure current draw. A shunt is already on board so its very easy to hook up! Since current sensors are a little more complex than volt meters, and its easy to confuse the wires, please read carefully to understand how to...

This small, palm-sized battery power meter has a small display that shows off how much juice is left in your single Lithium Ion/Polymer rechargeable battery. The color display has four levels of power indication once battery capacity becomes 100%, 75%, 50%, and 25%. When power is below 25%, only the red battery frame lights up. The design is pretty basic, it's just...

This Mini Power Meter with Voltage, Current, Watts, mAh & mWh Display (whew that is a mouth-full) is a lot like the USB In-Line Voltage and Current Meter we carry but can be used with a wide range of voltages (not just USB connections). Measure the working voltage and current output for any project with this really fancy power meter. This power meter has a small...

What do you do when you need a variety of measurements on your current project? (pun intended!) You could buy a slew of test equipment tools OR you could use this very nice panel-mount multi-function power meter! This power meter comes with a nice, big (and backlit!) LCD screen to display voltage, current, power, and energy parameters. You can use this meter to find...

Stop noodling around with an LM317 and wall wart - you can wield all the power with the DP832 Triple Output 195 Watt Power Supply! If you're doing any kind of electronics past Arduino-type hacking, you've probably been in a position where you need reliable power and the ability to source, analyze, and coordinate it to best suit your needs. A motor that wants 12V @...

This little USB port go-between is like a speed gauge for your USB devices. Instead of hauling out a multimeter and splicing cables, plug this in between for a quick reading on how much current is being drawn from the port. Great for seeing the charge rate of your phone or tablet, checking your battery chargers, or other USB powered projects. There are a few USB...

Discontinued - you can grab Multifunctional USB Digital Tester - USB A and C instead! USB has become the core of many projects, but it's troublesome to test USB voltage levels and current usage using a breadboard. Some people try to splice cables and alligator clip onto frayed ends, but it's difficult to get solid readings. This USB Tester will make it much easier to...

An essential companion when working on a ultra-low-power projects! If you've ever used a portable multimeter (even your $300 Fluke!) to measure sub-uA currents - say for a low power microcontroller or sensor project - you may notice that you're not getting the precision you expect, or that your project is acting finicky. How is this possible? – It’s...