Pic reset and following lock up problem

[Acetronics2]

Hi, Zerosvarka

First of all, you should use an ignition dedicated Ibgt, like

- ISL 9V5063 P3
- IRGS 14 C 40
- MGP 15 N 40
- FGB 3040 CS

...

they include their own overvoltage protections ( your Zeners are Wayyyyyyy tooooooo slow !!! ).

Second, you'll have to take great care of the 12 > 5 v section, serial inductors HAVE to be used to kill the spikes from the coil. Two cascaded regulators are not a view of mind here.

Third, the locking problems ...
ahaaaaaa, here, generally, the ground connections are made via the car body ... and are not good at all ( rust, oxydation, paint relieves ... ) . Try "star" connections to a same point. ( like HiFi !!! )

- and remember a breadboard doesn't like high currents or high slew rate signals.


NOW ... I see you use a NiCad 1500-1700 mah as a primary battery ... That's way too weak to drive a Car ignition coil AND give a "clean" 12 v ... ( see Osc pict. ...)





and most of all : ...

don't tell me your Ibgt is the little black thing with a heatsink, on the upper right part of your breadboard ...
Connected to the coil with thin gauge wires ...



begin by a "real world" wiring with ONLY the 5 volts section on the Breadboard ... at least use "veroboard" for the rest of the components ...

The problem is in the wiring and supply ... nowhere else.



This kind of design should work ... and have been working fine for years aboard the ignition we designed for Alpine A110 cars ...

The "Alpine A110 AEPL" ... it's it !!!

Alain