How to correctly measure ambient temperature

By mvuilleu, in Measures, november 06,2020.

Everyone knows that any measurement tends to disturb the physical quantity we are trying to measure. This issue is particularly blatant when you try to measure the temperature with a USB sensor. Some sensor types affect the temperature more than others, but there are ways to limit the problem. Let's look at this in more details...

Interfacing the SPS30 particle sensor

By martinm, in Measures and Programming, october 23,2020.

Sensirion recently released the SPS30, a particulate matter sensor with both a serial interface and an I2C interface. So, obviously, we didn't have to wait for long before someone asked us whether we could interface it with Yoctopuce modules.

How to measure the state of many buttons

By mvuilleu, in Measures, september 21,2020.

If you have already tried to build a control panel interfaced by USB with many ON/OFF buttons, you know that it's not as simple as it may seem. Not only the multiplication of buttons makes the wiring process quickly complex, but if you are limited to 5 or 8 inputs per module, the number of interface modules that you must use increases rapidly. A way to improve these two issues consists in multiplexing several buttons on a single analog interface, and this is what we are going to show you today.

Measuring time-encoded signals

By mvuilleu, in Measures, august 07,2020.

While we were making improvements to the Yocto-PWM-Rx for our previous post, we noticed that this device has considerably changed since its conception in order to cover more use cases than the once planned initially. To help you navigate into all these possibilities, we summarize in this post the different working modes.

Using a Yocto-Watt as energy meter

By mvuilleu, in Measures and New stuff, july 24,2020.

The Yocto-Watt is a small module which is very convenient to measure by USB the voltage, the current, and the instantaneous real power of an electric circuit. As it is also able to integrate the power to compute the total energy for a given lapse of time, some users also employ it to measure the energy that a system consumes, and we have recently improved this feature.