Kindly Morrow
Handheld Digital Oscilloscope with Component Tester
Probe a live PWM line, then drop an unlabeled transistor into the test socket without touching a second tool. This pocket unit combines a 200kHz oscilloscope, auto-identifying component tester, and passive measurement into one battery-powered package. It goes where a bench scope cannot.
The oscilloscope mode handles PWM, UART, I2C, and audio-range signals with adjustable timebase and voltage divisions. The component tester needs no manual ranging: insert a part and it returns type, pinout, and key parameters automatically. Built for the moment when pulling out full bench equipment costs more time than the actual debug.
Things to build with this
- Tune a servo controller on an ESP32 GPIO pin by probing the PWM output live and confirming duty cycle and frequency match your firmware values before the signal ever touches hardware
- Sort a bag of unlabeled transistors pulled from donor boards by dropping each one into the three-pin test socket and reading the auto-detected type, pinout, and Hfe or Vgs threshold directly off the display
- Check a 100kHz I2C bus between a Raspberry Pi and a sensor breakout for clean clock edges and missing pullup voltage, catching the wiring fault on-screen before blaming the driver
Key Features
- Oscilloscope bandwidth: 200kHz, covers PWM, UART, 100kHz I2C, and audio-range signals
- Auto-identifying component tester: NPN, PNP, N-channel and P-channel MOSFETs, JFETs, and diodes
- Passive measurement: capacitance, resistance, and inductance from the same three-pin test socket
- Single-channel input with adjustable timebase and voltage divisions, digital waveform display
- No manual ranging or mode selection needed for component ID, pinout orientation included in readout
- Battery-powered handheld form factor, fits in a toolbox or laptop bag
- US warehouse stock, typically delivered within the week
Frequently Asked Questions
Can this replace a bench oscilloscope for firmware debugging?
For first-look signal checks, yes. PWM verification, UART framing, and I2C clock sanity at 100kHz are all in range. High-speed SPI, anything above a few MHz, multi-channel analysis, or RF work still requires a proper bench unit. Use this as a fast field check, not a full replacement.
How does the component tester identify parts without manual mode selection?
Insert the component into the three-pin test socket and the unit auto-detects type, pinout orientation, and key parameters. It covers NPN and PNP bipolars, N-channel and P-channel MOSFETs, JFETs, diodes, resistors, capacitors, and inductors with no ranging required.
What is the practical bandwidth ceiling for oscilloscope work?
200kHz. That covers standard UART baud rates, 100kHz I2C, most microcontroller PWM frequencies, and audio signals. It is not suitable for SPI running above a few MHz or any RF signal analysis.
Does it need a bench power supply or USB power to operate?
Battery-powered, no outlet needed. Use it at the bench, at a workbench without a free outlet, or anywhere you are prototyping away from a dedicated electronics station.
Why we stock this
Curated by Kindly Morrow. We test and vet every product before it hits the store. If we wouldn't use it in our own builds, we don't sell it.
Things to build with this
Fun projects to try once you get your hands on it.
Connect it to Home Assistant
Most hardware plays nice with Home Assistant. Add it to your dashboard, write an automation, and make your home a little smarter.
Hook it up to Claude
Wire it to an API, point it at Claude, and let AI decide what it does. The future of hardware is firmware you didn't write.
Give it to a kid and watch what happens
Half the fun of hardware is watching someone else figure it out. No instructions, just vibes.
