A USB type-C power meter that will fit in-line with any USB-C connector and measure the voltage, current, power, charge and energy - as well as give an indication as to how stable and noisy your power supply is.
Because there is nothing on the market with good specs. No, let me rephrase that - there is nothing on the market with actual technical specifications. This product actually does have those, and I am really pleased with how precise its measurements are!
The meter is now self-calibrating - this means that it is now by design guaranteed to be in spec under all nominal operating conditions (4.1-24V input, -5 to +5A). For the previous revision, I had to hand-calibrate the meters, which is fine for point calibration, but does not account for long-term drift and is either prone to errors or relatively time-consuming.
When you use the meter with a product that can change voltage (e.g. quick-charging USB-C devices), the meter will perform re-calibration every time the voltage changes. This means the screen will freeze for about half a second. Don't worry, this is by design, and will only happen if the voltage changes rapidly and by a lot.
If you want a nice development board for the ATSAMD09D14A, you can additionally buy the SWD to ribbon converter ($5 add-on) so you can use your Segger J-Link or other SWD debugger to program and debug the microcontroller on this board. Binaries of the default firmware are available.
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Hey there! Like most people on this website I make electronics. In fact, I design a *lot* of electronics, over 100 designs per year. Most of them I make for me or for customers. Sometimes, I find a design so handy that I like to share it with others. For that, there is my Tindie store. My name is mux by the way, and I don't just make electronics, I make muxtronics!
As for more of my background: I am an electronic design engineer by trade and mostly design power electronics - that is: dc/dc converters, AC power supplies, power measurement equipment, electronic loads and the like. Aside from that I have a fairly broad engineering education and background, which means I like to do systems design, design for manufacturing, build enclosures using a variety of methods and so on.
I also blog and vlog, so check me out on my website: https://muxtronics.nl