This USB In-Line Voltage and Current Meter with OLED Display is a lot like the Charger Doctor We carry - if the doctor was a talented surgeon who just lost her medical license and has nothing to lose. Just like the charger doctor, you can use this meter to find out if your voltage is too low or your current draw is too high.
Use the USB In-Line Voltage and Current Meter to measure the working voltage and current output for any USB port and project. This blue plastic dongle plugs between a USB device, and passes the data lines through. There's a 0.025 ohm resistor in line with the power pin that is used to measure current draw. This voltage meter has an OLED display that shows off voltage, watts, amps, and mAH and instantly reads the numbers out for testing devices such as chargers, cables, and cell phones. There's a button on the back that allows you to flip the display 180° for easier reading.
You can use this device from 3.7-13VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It's a very handy tool for testing USB devices above 7VDC, checking load levels and debugging battery chargers and boost converters. It's a little chunkier, but more numerical than Adafruit's USB Power Gauge Mini-Kit. It's also not open source so check out the USB Power Gauge mini kit if you want to hack together your own power gauge indicator or Adafruit's Charger Doctor for a less expensive version that can handle less voltage.
- w/o USB Plug: 47mm x 22mm x 11mm / 1.9" x 0.9" x 0.4"
- USB Plug: 14mm / 0.6"
- Weight: 11.7g
- USB 1.x and 2.x - all data speeds. Does not have USB v3 pins so USB v3 connections will automatically downgrade to v2
- Working Range: 0~3A, 3.7~13VDC
- Resolution: 10mV / 10mA
This product is listed in:
Documentation and Resources:
- Rigol DG1022 vs Siglent SDG1025 vs Siglent SDG1032X - Function Generator Shootout
In this article I'll compare three popular Arbitrary function generators. They are all about the same price point and popular among makers. The models up for review are: Rigol DG1022 (data) Siglent SDG1025 ...
- The Maker Revolution
The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...
- Our Rigol DP-832 Power Supply Review
The Rigol DP-832 is a 3-channel, benchtop power supply suitable for a serious maker, makerspace or product developer. In this video I'll take you on a tour of the supply's operation and give my two cents on things I like and dislike. Ke...
- Our Rigol DS1054Z Oscilloscope Review
The quality and features in entry-level 'scopes has made a huge jump in recent years - In a nutshell, the 4-channel Rigol DS1054Z oscilloscope delivers tremendous bang for your buck. The DS1054Z is so well outfitted, I'd be happy if...
Exact shipping can be calculated on the view cart page (no login required).
We deliver Australia-wide with these options:
- $3 for Small Items (3-7 days, not tracked, only available on selected small items)
- $6.95 for Standard Post (2-4 days, tracked)
- $8.95 for Express Post (Overnight for Australia Post Next Day Network, tracked)
- Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)
International Orders - the following rates are for New Zealand and will vary for other countries:
- $11.49 for Pack and Track (3+ days, tracked)
- $16.50 for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount might increment based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.