Edouard gives us a preview of the new version of the in-line voltage/current tester board by FriedCircuits. He reports that the board is also compatible with the OLED Backpack (requires separate USB power source.) Via the contact form.
Tag Archives: current
USB current and voltage tester designed on the DP5031 standard PCB
Here is TitanMKD’s USB current, and voltage tester designed on the DP5031 standard PCB. The board features 4 standard USB connectors, while voltage and current can be measured via 4mm banana terminals For those interested in a cheap funny board to test USB current consumption/voltage or even check USB D+/D- and ID signal The goal […]
How much current do small USB-WiFi routers draw?
Jbeale reviewed how much current small USB WiFi routers draw. His intent is to connect them to the Raspberry Pi which can only provide 140mA over the USB port. It turns out that from Internet connectivity the routers draw under 100mA, but if used in high speed LAN operations the current draw jumps over R-Pi’s […]
Open source micro-ampmeter with autorange
Here’s an open-source micro-ampmeter with autorange. It can measure current from 0.05μA to 10mA. It’s designed on a single layer PCB, making it easy to build with DIY etching techniques: The micro-ampermeter described here is intended for experimenting with low-power devices. I have just a general multi-meter in my home lab, which is not very […]
Computer controlled power supply update
The computer controlled power supply being developed in the forum is progressing nicely. We got a big boost when Fenugrec posted a few circuit simulations based on a common commercial power supply typology. The simulated circuit is now available as an Eagle Schematic. We also transcribed the “Dave sink” constant current load from DaveCAD to […]