The quest for the perfect USB battery, part 4

By martinm, in Reviews, november 15,2024.

The last time we broached the subject, we found a USB battery from WaveShare that could power experiments based on Yoctopuce modules with quite respectable performance: 19 days of continuous use. But we're not giving up just yet. This week, we're turning our attention to products from Voltaic Systems: if the specifications published on their website are anything to go by, there's a good chance that their USB batteries work exactly the way we want them to.

The quest for the perfect USB battery, part 3

By martinm, in Reviews, october 04,2024.

This week, we continue our series on the search for the ideal battery to power Yoctopuce modules, especially when driven by a YoctoHub which can go into sleep mode. This is important, because standard USB batteries have the unfortunate habit of shutting down completely as soon as the hub goes to sleep. After the success of variant (C) of the Waveshare Solar Power Manager battery and the fiasco of variant (B), we decided to test variant (D), just to be sure.

The quest for the perfect USB battery, part 2

By martinm, in Reviews, august 23,2024.

This week, we're continuing our quest for the ideal USB battery to power systems built with Yoctopuce modules, and we've found a model sold by Waveshare that seems worth a look.

The quest for the perfect USB battery, part 1

By martinm, in Reviews, august 02,2024.

10-12 years ago, you could buy a USB battery for 10-20 euros, and use it to power a Yoctopuce experiment without asking yourself too many questions. Unfortunately, today it's very hard to find a USB battery that can power a Yocto-Wireless or YoctoHub-GSM-based experiment. So we decided to invest some time, and money, in trying to find a good one.

Testing the Renesas FS3000 air speed sensor

By mvuilleu, in Reviews and Measures, july 26,2024.

Renesas recently released a new I2C sensor that caught our eye: a tiny miniature sensor for measuring airflow velocity. It's a measure we're interested in, because many industrial processes need well-regulated ventilation to run reproducibly, and progressive clogging of filters can significantly affect ventilation capabilities. Let's take a look at this sensor...