Electronics > Projects, Designs, and Technical Stuff

Help doing a reverse engineering of a circuit board

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Renate:
Huh? I already gave you the guts of this on the other thread.
https://www.eevblog.com/forum/projects/need-some-help-building-a-circuit-involving-switchs-and-relays/msg3083532/#msg3083532

All the rest of it is transistor drivers for the relays, something you can just invent yourself.

Berni:
That is a good first step.

Now comes the more skillful step of arranging the components into a sensible layout.

First step in doing this is usually finding the ground and power supply lines. Those usually connect to most parts of the circuit and you know what the purpose of those is, so it solves a lot of nodes in the circuit. You might want to draw the ground traces in black on your diagram. Then you start redrawing it. Typicaly replace ground and power connections with ground symbols to make it clearer and move it around into what seams sensible configurations.

Shaydzmi:

--- Quote from: Renate on June 02, 2020, 12:54:00 pm ---Huh? I already gave you the guts of this on the other thread.
https://www.eevblog.com/forum/projects/need-some-help-building-a-circuit-involving-switchs-and-relays/msg3083532/#msg3083532

All the rest of it is transistor drivers for the relays, something you can just invent yourself.

--- End quote ---

Thank you, I didn't understand what you did, so I decided to go step by step myself, to understand this circuit.

Now I want to simulate this circuit.

Shaydzmi:

--- Quote from: Berni on June 02, 2020, 12:58:02 pm ---That is a good first step.

Now comes the more skillful step of arranging the components into a sensible layout.

First step in doing this is usually finding the ground and power supply lines. Those usually connect to most parts of the circuit and you know what the purpose of those is, so it solves a lot of nodes in the circuit. You might want to draw the ground traces in black on your diagram. Then you start redrawing it. Typicaly replace ground and power connections with ground symbols to make it clearer and move it around into what seams sensible configurations.

--- End quote ---

Thank you, I'll do what you said.

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