Tuesday, July 17, 2012

Wireless LED Throwie Transmitter

Wireless LED throwies require a power driver to run the coil loop from which they receive energy to light up. This transmitter has a 555 oscillator that controls the gate on an N-channel MOSFET which alternately turns the power to the coil on/off at a high rate, creating an alternating magnetic field at around 18kHz.

The coil loop is made from 24 gauge wire or less and is wound on a square or round form made from brads hammered into a wooden board.


The basic schematic is here:



The transmitter PCB artwork and component overlay is provided here on a 8.5 x 11" sheet for simple generation using my toner transfer method, it is scaled already so is ready to print:




Parts list:

555 timer IC
7805 Voltage Regulator
IRF540N (or any N-channel MOSFET)
16V 10 uF Capacitor
16V 1000 uF Capacitor
1k resistor, 1/4 watt
5k resistor, 1/4 watt
27k resistor, 1/4 watt
1nF ceramic cap
24 gauge or thinner magnet wire (coil)

More updates soon with a video description!

5 comments:

Jane said...

Can you please post a picture of the "Wireless LED Throwie Transmitter"? We don't get a very good look at it in the video.

Thanks so much. Your blog is amazing.

Anonymous said...

What power supply are you using?

Anonymous said...

Is it 10uF or 1uF?

Which direction is positive for the 1nF?

The specs of the LED seem to make a difference and it's confusing me. Can you explain its purpose?

What's the diameter and number of turns for the coil?

Please answer. I've gotten myself stuck. Thanks so much.

nima yazdani said...

i would buy this project for $100, if you are interested please email me at ynima23@gmail.com
i really need this...

Jessica Binder said...

I need some further assistance , I'm looking to implement this in a neuroscience project. Please email me back!!!