Archive for the ‘Applications’ Category

MicroHTR (Part 9)

Part 1, 2, 3, 4, 5, 6, 7, 8, 9 Here is an update of the MicroHTR (aka micro heater application) topic. Guy is a former marine pilot and his hobby is flying his touring-motor-glider wrote to me a very interesting message: “When flying close to cloudbase, the air becomes cold and the relative humidity […]

Blog of the day

Thank you Guy for your very informative mail, the kind of request I love and pushes me hard to help. Part of the description of Guy’s project (Controlled heaters for deicing the carburetors from his touring-motor-glider) was a reference to Brett Beauregard’s blog. Although I understand that nowadays Brett’s main preoccupation leads him to a […]

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 […]

Date and time serial: how to bypass the lack of precision of floats

Data type is probably the first concern for any new programmer in c/c++. These language require in minimal knowledge about integers and floats (Check this thread). Although these data types look familiar to all educated people, the principle of significant figures, which should be the universal way of formatting data, is, most of the time, […]

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 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 2)

Part 1, 2 As seen in the previous post, the MCU (e.g. arduino) and the module are talking each other through a serial communication (UART) at a quite modest rate of 9600 baud. Data is exchanged as packets of 10 bytes according to the following structure: Byte# Function Value Comments 0 Start Byte 0x7E constant 1 […]

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. […]