i've found this schematic circuit... but the problem is..idunno how to read it... can some one help me... what the partlist, and how to construct this device...

 

The 16F84 is a standard old PIC, you need a PIC programmer to program it - try reading the 'sticky' in the micro-controller forum.

Presumably you have the code to program in the chip?.

What does the RS232 interface allow you to do?, the 16F84 has 64 bytes of non-volatile memory, perhaps it's for storing parameters there to alter preformance?.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

yes, i have the .hex file.. also the .asm of the CDI.. but need to build th PIC programmer hardware first... i've found the simplest Pic programmer in the net.. (if you have some other way please let me know)

is it hard to do this device?? i really2 zero about electronic...

 

You should start with a simpler circuit first if you cannot read a schematic. For starters, checkout these links to help you learn how to read schematics:
http://www.mitedu.freeserve.co.uk/Prac/symbol.htm
http://www.mitedu.freeserve.co.uk/Prac/readdiag.htm

__________________
--- The days of the digital watch are numbered. ---

 

thanks bro!...

 

uuuuhhh Is it just me or are there no schematics in this thread

 

missing links... sorry..

 

Nigel's supposition is correct. The microcontroller is there to adjust the spark advance according to engine speed. It allows for easy starting and then changes according to speed for more power. The hobbyists use a table look-up for the advance settings. See: http://www.rcuniverse.com/forum/m_4344316/tm.htm

In answer to "how does it work," the 400V capacitor connected to the spark coil is charged with rectified current from the alternator, then rapidly discharged through the BT151 SCR , which causes the ignition coil to generate the high voltage (inductive
kick) needed to fire the spark plug. The microcontoller provides the pulse needed to fire the SCR. The pick-up is frequently a Hall sensor, which provides timing information to the microcontroller.

 

Hi dear,

I can build the circuit, and I have a pic programmer but don't have the hex code file, if u have it please send me

 

It's here: http://www.modelbouw.gompy.net/newcdi/newcdi.htm

You may want to delete your e-mail address from your original post. John

 

Thank u for ur reply,
after build the circuit I'll can send u the result assoonas possible

 

any body help me to make cdi .anybody send me diagram on my e.mail adders.this is my adders asif_shah25@hotmail.com

 

how i can make cdi anybody tell me .

 

This thread provides a lot of information. What do you not understand? Please ask specific questions.

 

tell me about input and output con action .