Archive for the ‘Arduino’ Category

Power meter (Part 3)

Part 1, 2, 3 Once the hardware is ready, let’s have a look at the data and the software used to read these data. The customer information can operate in two different modes: historic: for compatibility reasons with older meters, this is the default mode. standard: this new mode, available from the latest Linky meters. […]

Power meter (Part 2)

Part 1, 2, 3 I have been tumbling through the net, looking for interfaces to the TIC. So far, I found two types of reference designs: The quick, dirty, safe but questionable design The academic design Most of the interfaces described on the web are very basic. They feature a single optocoupler and a biasing […]

Power meter (Part 1)

Part 1, 2, 3 Yesterday’s electric meters were mostly electromechanical meters. They were measuring consumption, they required a technician to read the past power consumption, diagnose them and change their parameters such as power ratings Today’s electric meters are communicating meters, which means that they can receive and send data without the need for the […]

Let’s celebrate Apollo XI !

I remember very well the 20th of July 1969… I was in a holiday camp and the director had the bright idea to get a portable TV set, to power it with the battery of his car and he managed to have as many kids as possible watching this event. At this time, I had […]

Checking clock accuracy

This T&T explains how to check the accuracy of a Real Time Clock (RTC). Lets make it a little bit harder and say that you do not have access to the Internet… Checking a RTC requires a highly accurate reference time base which can be read from a radio signal. Starting from there, two options […]

TASCAM Sound Recorder (Part 4)

Part 1, 2, 3, 4, 5 And here is the driver code. Nothing exceptional just plain good’ol arduino code. Check the writeByte function which contains few tricks and optimizations that are mandatory to achieve a proper timing. Ultimately this code contains a pretty versatile bit-bang UART writer that you may want to reuse in various applications. […]

TASCAM Sound Recorder (Part 3)

Part 1, 2, 3, 4, 5 As per product reviews on the web and as per my personal experience, the DR-40 picks up noises generated by the handling of the device. One way to prevent such noises consists in using a wired remote controller namely the Tascam RC-10. The key component from this option is […]

FN-M16P MP3 player (Part 1)

Part 1, 2 How come I managed to miss this fancy little module ? It’s my good ol’ friend Sébastien from Quai-Lab who showed me this little piece of electronic which he included in his inMoov robot. Bright idea ! For a few €, his robot will speak and improve its interactions to the public. […]

Particle sensors (Part 1)

Part 1 I am amazed by the massive improvements of sensors along the last 10 years. Not so long ago, some sensors would fit in a shoe box and require 24 VDC, not to talk about the interfaces, weight, etc. These improvements are mainly due to the incorporation of advanced sensors in smart phones: camera, […]

Metal detector (Part 1)

“Dear cousin, I lost my keys in the middle of the meadows, would you please make a metal detector for me ? Urgent !“ This is really how this project started ! More or less, as I have in mind the design of an Earth’s Field Nuclear Magnetic Resonance spectrometer which features magnetic fields sensors on […]