PLUME – Making some PCB and playing with coils


We finally have an emitter coil. 🙂 It is not finished yet but we are already used it to make tests. (Pictures are coming as fast as possible).

We try to see the intensity of the fields generated by our system but it is very low at the moment. It remains for us to be able to generate the signal that we will use with the coil. Indeed a “classic” frequency generator is current limited and this poses us problem. We will use an H-bridge to power the coil during our tests.

On the other hand, we continue our inquiries on the shape of the coil and the number of laps that we need. Indeed, despite our 200 turns of wire, our system is less efficient than the Razer Hydra.

Moreover, these last two days, I worked a litlle bit on my lab work with my STM32. Now, I am able to use the potentiometer and the adc to have some fun with the led intensity. Actually, I’m working to implement a serial port to USB. My purpose is to use the correct driver of ChibiOS to  configure the USB port used to power the card so that it is seen as a serial port. I hope to finish that as soon as possible.

 Finally, today I re-started to use Expedition PCB. I missed it a bit. 🙂 I look forward to be able to map our project because I really like the idea that the placement / routing of components that does not happen randomly but must comply with all rules of signal integrity and electronics.
To be continued…
Capture IMG_20140307_212525

Guénolé Lallement


2 comments to PLUME – Making some PCB and playing with coils

  • alexandre

    If you want high emission power, a simple H bridge will not work alone. I would recommend using your coil in a high Q resonant L-C circuit configuration. You may need a variable capacitor to tune the resonant frequency to your system frequency.

  • That’s the plan. The H-bridge without resonant LC configuration was just for a quick test before the week-end (and Télécom’s gala) 🙂