That looks good, 10 to 15ma is good for the opto......
now make the short trace to Screw Pad 2 as fat as the rest of the trace.....
That looks good, 10 to 15ma is good for the opto......
now make the short trace to Screw Pad 2 as fat as the rest of the trace.....
Good catch Richard..... Opto pin 4 to the Base of the TIP41, and Pin 5 to the 7812's output.....
Most of the time, the Cap will not discharge down to the Battery voltage level and will have that 2V over the 7812..
I have never seen this version Schematic that Claudio is using.... I had never used a 7812 for that use....
A 10-12V zener diode with resistor and cap will do the trick, but even that is not needed, unless you are killing the base of the TIP41, by charging 24V Battery's
The 4N35 has a Maximum Collector Emitter Voltage: 30 V
H11D1 has a Maximum Collector Emitter Voltage: 300V much better choice when hitting it with Hi V spikes from a SG/SSG.....
Last edited by RS_; 05-29-2018 at 02:01 PM.
Hallo RS_ and Richard,
thank you again, I am learning..
I'm referring from this schematic coming from the JB and PL Books..
SG-Cap_pulse-sch.jpeg
H11D1 will be installed, I just didn't find the opto in the software...
Will use 12V batteries
Of course I will breadboard the circuit, I have all the components ready but unfortunately in this period of the year I do not have much time...
updated circuit
PCB_PCBetchLED2_20180530085545.pdf
still looks like you have the opto output pins wrong, you need to use pins 4 and 5, not 5 and 6
Thank you for your specifications, very instructive for me
Breadboarding will prove if it will work
The 7812 I got is the L7812ABV-DG from mouser
Modified the PCB following your wise indications, please confirm the new cap is ok..
PCB_LED3_20180531123106.pdf
done..
I will test on breadboard and if it works will send to manufacture, conductivity is way better on manufactured PCB
thank you
PCB_LED3_20180603090714.pdf
Dear Faraday88, RS_, Richard,
I am finally back to my project, I hope you will be still available to help me…
My SG :
Bike wheel diam. 63,5 cm
21 Magnets 5x2,5x1cm (smaller than indicated on the book but in EU could not find them)
Coil: Teslagenx 7 strand + 1
RPM 314
Amp in 1,4
Amp out 0,6-0,7
Batteries (Primary and Charge) 12V - 45ah
Resistence on impulse 157 Ohm (Potentiometer stil there)
No Capacitor module yet…
I am having difficulties on understanding the right connections for the Cap Module I produced (if it will ever work!).
I post here the images of circuit, PCB and scheme to explain:
When I connected 1 to the neg charging Battery and 2 to the pos it fried the ammeter immediately.
What am I doing wrong ?
Could somebody help please…
thank you
regards
claudio
SG-Cap_pulse.jpegPCB.jpgCircuit.jpg
Last edited by claudio; 02-09-2019 at 08:55 AM.
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