RE: Opensource CDI ignition
I use TE-20 programmer with IC-prog software (freeware). It was very popular in my country a few years ago. http://www.terra.es/personal5/ajss123/te_20se.htm In this page you can find the schematics of a very good and easy programmer.
Posted on: 10/11/2005 7:40 AM by Author "aalbea" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3444021

RE: Opensource CDI ignition
You're correct. Only two wires coming out from the coil. Yesterday I tried to wind only 20 turns of wire directly to the magneto (put first some electrical tape to avoid cutting the insulation) and works OK too (spark less "bright", but consistent). Third wire you can see in the picture (thicker black at right side of the picture) is soldered to the core of the stock magneto and must be connected to the engine body, in order to close the high voltage circuit. I have not my camera today. I will try to upload another picture tomorrow.
Posted on: 10/7/2005 5:20 AM by Author "aalbea" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3430790

RE: Opensource CDI ignition
I use 5V and the current is limited to about 25 mA with a resistor of 180 ohm and the SCR triggers really good. The voltage at the SCR imput falls to 2Vpp max. Probably it will run OK with less current. A good and easy way to invert the pulse of a hall device is by using an optocoupler. 4N25 device can do the work, but we're still working on. Best Regards
Posted on: 10/6/2005 10:34 AM by Author "aalbea" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3427827

RE: Opensource CDI ignition
To diablo: Probably, if you runned the circuit with too much voltage (more than 400 V), you burnt the SCR. It was quite usual for me during thqe development tests. Try changing the SCR. Another important detail is that if you're using a logic signal Hall device, the output will be reversed (e. g. you have output until the magnet goes to the sensor), so the power stage needs to be adapted to work correctly. Best regards.
Posted on: 10/6/2005 3:19 AM by Author "aalbea" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3427247