Tools / Test Equipment

Here you will find a collection of the best bang for your buck electronics test equipment. Each tool in this category has been tested and approved by Ladyada. Whether you are getting started and just need your first multimeter, or are an electronics engineer looking to upgrade your lab with a quality adjustable power supply or need an on-chip debugger, you will find what you need here. Many of the tools here like the toggle clamps or PCB test points are products that are used every day here at the Adafruit HQ for manufacturing and quality control.

Angled shot of a Mini 2-wire Volt Meter.

Mini 2-wire Volt Meter (2.7 - 40 VDC)

Product ID: 460

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....

$7.95

In stock

Angled shot of a Mini 3-wire Volt Meter that reads 3.2.

Mini 3-wire Volt Meter (0 - 99.9VDC)

Product ID: 705

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...

$7.95

In stock

Angled shot of a Panel Current Meter reading 5.18.

Panel Volt Meter - 4.5V to 30VDC

Product ID: 575

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...

$7.95

In stock

Angled shot of a Panel Current Meter reading 0.00.

Panel Current Meter - 0 to 9.99A

Product ID: 574

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...

$9.95

In stock

Bus pirate basic probe set

Product ID: 238

This is a interface cable designed for Bus Pirate which can makes it easier to connect the Bus Pirate to a circuit and get hacking!

$12.50

91 in stock

Pocket Autoranging Digital Multimeter

Product ID: 850

When we're on the go, we like to keep a multimeter in our purse and this model is by far the best pocket meter we've found. It's so good you'll end up using it as your main multimeter! First up, this meter can measure nearly everything: it's got DC and AC voltage, resistance, diode, and beeping continuity test, capacitance, and frequency. And that's not all! It's...

$24.95

11 in stock

SMD Component Testing Tweezers

Product ID: 1359

These tweezers are perfect for anyone who does a lot of work with SMD components (and hey, who isn't these days?) Use these instead of squinting and trying to use clumsy multimeter probes to detect an LED's color, polarity, or resistor/cap value! The multimeter 'probes' are the two tips of a tweezer-shaped multimeter. Simply 'grab' a resistor, capacitor, diode, or...

$31.50

In stock

Angled shot of a Panel Tempature Meter reading 23.

Panel Temperature Meter / -30 to +70 °C

Product ID: 576

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...

$9.95

86 in stock

Digital Multimeter - Model 9205B+

Product ID: 2034

This massive multimeter has everything but the kitchen sink included. It's a great addition to any workbench or toolbox. It's low cost, simple to use, and has a big clear display with all the measurements you need and more! The multimeter includes: AC/DC Voltage measurement. Current measurement, from 2mA range up to 20A range (both AC and DC). Beeping continuity...

$17.50

In stock

Adafruit USB Isolator - 100mA Isolated Low/Full Speed USB

Product ID: 2107

Have some USB logic analyzer, multimeter or oscilloscope and bumping up against the frustration of a shared earth ground? The Offspring (known for being electrical engineers) wisely sang "Ya gotta keep'em isolated!" Power and signal isolation improves common-mode voltage, enhances noise rejection, and permits two circuits to operate at different voltage levels. This...

$34.95

In stock

Oscilloscope Probe 100MHz

Product ID: 1528

Poke and prod your electronics with a new 'scope probe. This is a classic probe, good quality and has a nice strong spring-clip and grounding clip. Good for up to 100MHz signals, with a standard oscilloscope BNC connector. Comes as shown, the ring color on the body of the probe/connector may vary.

$14.95

In stock

Pogo Pin Probe Clip

Product ID: 1969

The Pogo Pin Probe Clip is a great way to test and connect with pin-point accuracy without soldering! It's sort of like an alligator clip with a built-in springy pogo pin - so you can connect to any PCB pad for 'scoping, analyzing, or multimetering. The clip is strong enough to grip onto a PCB but has a soft grip so it won't mar or damage circuits. The 'tongue' is a...

$2.95

20 in stock

Angled shot of a Saleae Logic 8 - 8 Channels Logic + Analog kit.

Saleae Logic 8 - 8 Channels Logic + Analog - Black

Product ID: 2512

Saleae has updated their popular Logic analyzer series to now include analog capabilities. A logic analyzer is a device that lets you watch digital signals in your electronics project, perfect for debugging protocols and communications between two chips. An oscilloscope lets you look at analog signals, good for determining what's up with your power supply, audio...

$499.00

5 in stock

Toggle Clamp - Large Size - 201B

Product ID: 2457

*Ka-thunk* Pin down that PCB with our Toggle Clamp, a sturdy and reliable way to quickly press and release with precision! A pogo-pin bed is a great way to connect and test boards without any soldering, but you have to somehow get that PCB aligned right and evenly pressed down on each pogo. After much experimenting, we settled on this toggle clamp and we use it all...

$4.95

In stock

Toggle Clamp - Small Flip-down Style

Product ID: 2459

$3.95

In stock

Fixture Clip - Short

Product ID: 2458

Doesn't this fixture clamp look like a character in a Pixar movie? If you just drew two little eyes on it then you could just imagine it hopping around on nifty, adorable little adventures that are heartwarming and...sorry, we got carried away. This fixture clamp is a great way to hold a printed circuit board in place while you're testing or programming. It comes...

$0.95

In stock

Toggle Clamp - Medium Flip-up Style

Product ID: 2456

*Ka-thunk* Pin down that little PCB with our Toggle Clamp, a sturdy and reliable way to quickly press and release with precision! A pogo-pin bed is a great way to connect and test boards without any soldering, but you have to somehow get that PCB aligned right and evenly pressed down on each pogo. After much experimenting, we settled on this toggle clamp and we use...

$3.95

In stock

Black Nylon Screw and Stand-off Set with M2.5 Threads, kit box

Black Nylon Machine Screw and Stand-off Set – M2.5 Thread

Product ID: 3299

Totaling 380 pieces, this M2.5 Screw Set is a must-have for your workstation. You'll have enough screws, nuts, and hex standoffs to fuel your maker tendencies for days on end! M2.5 size screws fit almost all of the Adafruit breakout/dev board mounting holes (2.5mm or 0.1" drill holes). Works great with Feathers, Adafruit breakout boards, Pi HATs and plates, and more!...

$16.95

In stock

Angled shot of a QT Py microcontroller plugged into a JST-SH cable with four micro SMT test hooks in yellow, blue, red, and black. The test hooks grip the first four connections on a breakout board.

JST-SH 4-pin Cable with Micro SMT Test Hooks - STEMMA QT / Qwiic

Product ID: 5037

This cable will make it super easy to use our plug-and-play STEMMA QT boards and controllers with chips, breakouts, and other devices that are I2C compatible but don't come with a STEMMA QT socket already on 'em. On one end you get a Qwiic / STEMMA QT connector (technically known as a JST SH 4-pin plug) into 4 individual wires with 'micro hook' ends. The hooks are...

$2.95

In stock

Small PCB Test Points (100 pack) - White

Product ID: 3824

Testing is an important step in board manufacturing. And it can be super tricky on a fully populated PCB. So how can you test connections when you have an assortment of components blocking your probe? These "mini loop type" Small PCB Test Points easily snap in to your project, and they're ideal for ultra-low profile surface-mount testing! They will attach to J hooks,...

$9.95

7 in stock

White Nylon Screw and Stand-off Set with M2.5 Threads, kit box

White Nylon Machine Screw and Stand-off Set – M2.5 Thread

Product ID: 3658

Totaling 420 pieces, this White Nylon M2.5 Screw Set is a must-have smörgåsbord for your workstation. You'll have more than enough screws, nuts, and hex standoffs to construct your maker projects for days on end! M2.5 screws fit nearly all of the Adafruit breakout/development board mounting holes (2.5mm or 0.1" drill holes). These screws work handsomely...

$14.95

In stock

Black Nylon Machine Screw and Stand-off Set – M3 Thread

Product ID: 4685

Totaling 420 pieces, this M3 Screw Set is a must-have for your workstation. You'll have enough screws, nuts, and hex standoffs to fuel your maker tendencies for days on end! M3 size screws fit a number of Adafruit breakout/dev board standoffs. Since they are nylon you can file them down easily, and they don't conduct electricity or interfere with...

$16.95

In stock

Kelvin Clip

Product ID: 3313

Kelvin clips are used whenever you need to get a measurement right at the contact points of a circuit or component. Even though these are grippy clips, each side of the clip is electrically insulated. So you can use it to grab onto a part (as seen above) and perform measurements. These can also be used in circuit if needed. The clip is bare and comes with two jaw...

$2.50

In stock

Basic Multi-Color Micro SMT Test Hooks (6-pack)

Product ID: 4322

Testing and debugging is a challenging step in board manufacturing. It can be super tricky on a fully populated PCB. So how can you test connections when you have an assortment of components blocking your probe? These Basic Micro SMT Test Hooker have solderable tabs on one end so you can attach a wire, and on the business end, a spring-actuated double-hook.They...

$3.50

In stock

Pogo Pin Probe Clip clipped to a PCB with 2x5 pads.

Pogo Pin Probe Clip - 2x5 1.27mm Pitch SWD

Product ID: 5434

The Pogo Pin Probe Clip with 2x5 0.05" pitch SWD spacing is a great way to test and connect with pin-point accuracy without soldering! It's sort of like an alligator clip with an array of built-in springy pogo pins - so you can connect to a PCB with classic 'SWD' pad holes, without soldering or a special adapter cable. The clip is constructed from PCB sections, with...

$19.95

20 in stock

Mini Power Meter with Voltage, Current, Watts, mAh & mWh Display

Product ID: 3624

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...

$24.95

63 in stock

angled shot of coiled half-meter long black banana plug cable.

Retractable Stacking Banana Plug Cable - Black 0.5 meter long

Product ID: 5472

Why are bananas never lonely? Because they hang around in bunches! A lot of power supplies, multimeters, and other benchtop equipment use standard 4mm banana plugs to connect this-to-that. When you need more, we now stock them! These are handy stackable and retractable Banana Plug cables! The retracting plastic protection bit on the end will automagically disappear...

$4.95

In stock

Large Panel-Mount Digital Power Meter - 6.5V to 100VDC up to 20A

Product ID: 3626

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...

$17.50

In stock

A red 0.5meter long cable with retractable banana plugs.

Retractable Stacking Banana Plug Cable - Red 0.5 meter long

Product ID: 5471

$4.95

In stock

mini battery meter hooked up to a li-poly battery. The display on the battery meter reads three out of four blue tiers.

Single Li-Ion and LiPoly Battery Power Meter

Product ID: 5383

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...

$2.95

83 in stock

Angled shot of a 1 meter long OBD Plug (16-pin) to DE-9 (DB-9) Socket Adapter Cable.

OBD Plug (16-pin) to DE-9 (DB-9) Socket Adapter Cable - 1 meter long

Product ID: 4841

Not to be confused with ODB, OBD stands for On Board Diagnostics and is used for analyzing and diagnosing vehicles. It's the thing your mechanic plugs into to find out why you've got a blinking engine light. Technically, OBD uses CAN bus and, hey, whaddya know, we've got some CAN-capable microcontroller boards here at Adafruit so this OBD Plug (16-pin) to DE-9 (DB-9)...

$5.95

In stock

Small PCB Test Points (100 pack) - Red

Product ID: 3825

$9.95

In stock

Angled shot of Nordic nrF Power Profiler board.

Nordic nRF-PPK2 - Power Profiler Kit II - Power Measurement Tool

Product ID: 5048

The Power Profiler Kit II is a standalone unit, which can measure and optionally supply currents all the way from sub-uA and as high as 1A on all Nordic DKs, in addition to external hardware. As we've featured on EYE ON NPI, this power profiler is an excellent value - with capabilities that match tools 10x the price! The PPK2 is powered via a standard 5V USB cable,...

$99.95

75 in stock

I2CDriver by Excamera Labs

Product ID: 4267

I²CDriver is an easy-to-use, open source tool for controlling I²C devices and a great tool to help with quick driver development and debugging. It works with Windows, Mac, and Linux, and has a built-in color screen that shows a live “dashboard” of all the I²C activity. It uses a standard FTDI USB serial chip to talk to the PC, so no special...

$29.95

31 in stock

Top view of white dev board, white USB cable, and snake-shaped sticker.

GreatFET One by Great Scott Gadgets

Product ID: 4234

GreatFET One from Great Scott Gadgets is a hardware hacker’s best friend. At the center is a powerful NXP LPC4330 (Cortex M4 @ 204MHz) with two USB ports, one host and one peripheral, so it can act as a 'man in the middle' for USB interfacing. With an extensible, open source design, two USB ports, and 100 expansion pins, GreatFET One is your essential gadget...

$99.95

40 in stock

SPIDriver by Excamera Labs

Product ID: 4268

SPIDriver is an easy-to-use tool for controlling SPI devices and a great tool to help with quick driver development and debugging. It works with Windows, Mac, and Linux, and has a built-in color screen that shows a live logic-analyzer display of all SPI traffic. It uses a standard FTDI USB serial chip to talk to the PC, so no special drivers need to be installed. The...

$29.95

12 in stock

Small PCB Test Points (100 pack) - Black

Product ID: 3823

$14.95

1 in stock

Top view of assorted computer repair components.

Computer Repair Screw and Standoff Kit

Product ID: 5411

The Computer Repair Screw and Standoff Kit contains all those bits and pieces that get lost whenever installing stuff into your computer or electronics devices: the screws, standoffs, washers and more that are used for the chassis, fan, motherboard and component extras. They may also be used by other electronic devices around your home. Particularly useful if you are...

$9.95

15 in stock

Digilent Analog Discovery 2 USB Oscilloscope and Logic Analyzer

Product ID: 4652

Digilent Analog Discovery 2 is a USB oscilloscope, logic analyzer, and multi-function instrument that allows users to measure, visualize, generate, record, and control mixed-signal circuits of all kinds - using any desktop computer or Raspberry Pi 4! Developed in conjunction with Analog Devices and supported by Xilinx University Program. This test and measurement...

$374.95

49 in stock

USB Microscope - 5MP interpolated 220x magnification / 8 LEDs

Product ID: 636

As electronics get smaller and smaller, you'll need a hand examining PCBs and this little USB microscope is the perfect tool. Its smaller and lighter than a large optical microscope but packs quite a bit of power in its little body. There's a 2 megapixel sensor inside and an optical magnifier that can adjust from 20x (for basic PCB inspection) to 220x (for detailed...

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$79.95

Out of stock

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Pogo Pin Probe Clip clipped onto a PCB with six pins.

Pogo Pin Probe Clip - 6 Pins with 2.54mm / 0.1" Pitch

Product ID: 5433

The Pogo Pin Probe Clip with 6 pins in a 2.54 / 0.1" pitch spacing is a great way to test and connect with pin-point accuracy without soldering! It's sort of like an alligator clip with an array of built-in springy pogo pins - so you can connect to a PCB with classic 0.1" spaced pad holes, without soldering or a special adapter cable. The clip is constructed from PCB...

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$10.95

Out of stock

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Miniware DT71 Mini Digital Tweezers

Product ID: 4774

DT71 Mini Digital Tweezers are among the nicest, most handsome digital test equipment we've come across. The DT71 is compact and pocket-sized for easy portable use. They're a perfect assistant for folks who have assorted SMT components that need verification - either because they aren't marked or because the text is so tiny. Great for checking passives, we like them...

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$69.95

Out of stock

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probe clip with cable attached to a SOIC chip on a pink PCB.

SOIC 8-Pin Test Clip to DIP Adapter

Product ID: 5315

This SOIC Test Clip is a great way to test and connect to Flash memory, EEPROMs or other 8-SOIC chips, with pinpoint accuracy and NO soldering! It's sort of like an alligator clip but with 8 metal teeth that grip nicely onto normal or wide SOICs. So handy for when you need to probe an I2C, SPI or QSPI connection - or burn firmware to a chip without desoldering. The...

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$14.95

Out of stock

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Beagle USB 12 - Low/Full Speed USB Protocol Analyzer

Product ID: 708

USB complexity got you down? Need a hand with enumeration? Reverse engineering a USB device? You will fall in love with the Beagle 12 USB Analyzer. This hardware analyzer is completely non-intrusive, and is much better than flaky software analyzers. Perfect for when a problem is bad enough it crashes the USB host, or for real time data capture analysis. We used the...

$495.00

8 in stock

Oscilloscope with probes detached surrounded with accessories.

1 GS/s 50MHz Digital Storage Oscilloscope - Rigol DS1052E - Rigol DS1052E

Product ID: 681

The ultimate debugging tool for electronics, this oscilloscope will turn you into a "Circuit Whisperer". You will be able to peer into the workings of your circuits to better understand them. Difficult problems will suddenly become trivial. We tried many beginner oscilloscopes and found this one to be a perfect balance of price and function: it's perfect as a 'first...