I've been searching about this topic for a year to make a simple project. However i found nothing simple. Every project contains hard to find materials and high voltage. I'm trying to make it simpler. I also find a Hungarian site about this project. But i made some changes. Schematic in this site will also help you. http://skory.gylcomp.hu/kapcs/
Step 1: Materials...
(I give capacitors by using codes and values)
- BD139 Transistor / 1
- 5.1 K resistor (all resistors will work) / 1
- 220n or 224 Capacitor / 1
- 4.7n or 472 Capacitor / 2
- 1.5pF or 102 Capacitor / 1
- LED / 1
- 1N4148 Zener Diode / 1
- Jumper wires
- Cable for Coil
- 9V Battery and Clip
Step 2: Making Coils
I made coils which have 7.5 and 4.4 cm diameter. Both work very well.How I don't know about numbers of winding. I use 1.5m cable.
Whatever... We need to make 2 coils, one for receiver and another for transmitter circuit. Receiver circuit need normal coil, no splice.
However the coil which is going to attached to the transmitter circuit is different. It needs a wire which is come out at the middle of the coil. This is the most important part otherwise the circuit may not work.
Step 3: Making the Transmitter Circuit
It's time to make transmitter circuit. I build this into breadboard but you can easily transfer into the perfboard. It's definitely much more steady.
Step 4: Making the Receiver Circuit
It is much more simpler than the transmitter circuit, so i directly soldered it onto the receiver coil which have 2 outputs.
Step 5: Result
Now when you add 9V to the rails and put the receiver circuit to the top of the transmitter circuit it should light up. If it's not, check your connections and polarity of diode.
Step 6: Few improvements and Version2 With 10000uF Capacitor
I also made smaller coils and using white led with 10000µF Capacitor. It runs about 3 minutes.There are the results :)
Step 7: Schematic
There is it ;
Note:I made it simpler this project not belongs to me. Just for entertainment and educational purposes only.