hello,
This is a cascaded multi level inverter.
Iam trying to design a firing circuit based on 555 monostable, 555 astable, NOT gate, and optocouplers.
see the attachments

attachment 1: schematic of 2 level cascaded multi level inverter

attachment 2: firing scheme

attachment 3: my problem

How can i trigger the monostable with the pulse shown in attachment 3??

thankyou

 

Just double checking, you want to trigger a 555 monostable with a positive going pulse? A simple transistor inverter in front of a conventional monostable would do this, or any inverter for that matter.

 

Just double checking, you want to trigger a 555 monostable with a positive going pulse? A simple transistor inverter in front of a conventional monostable would do this, or any inverter for that matter.

ThanQ Bill_Marsden

And one more question (just for conformation)
How can a long duration pulse can be converted into a spike using RC circuit?? see the attachment

Can u post the schematic

 

Direction of flow for schematics is important, it can make a schematic hard to read or easy.

Basically the capacitor charges up, and no more current flow, so the resistor then predominates.

 

Direction of flow for schematics is important, it can make a schematic hard to read or easy.

OK.
It is a part of the schematic. Thats why the direction is reverse.

Basically the capacitor charges up, and no more current flow, so the resistor then predominates.

And, I got your point. I have done the simulation.
Thank you Mr. Bill_Marsden