# Discussion Forum

## Electrical schematic of electrical circuits

Hi,

I am trying to connect two elements in parallel and then in series with a resistor, ground and circuit. It not clear in COMSOL how are my nodes connected to each other. Is there a way to make a clear map or schematic of the electrical circuit to understand what am I doing?

3 Replies Last Post Apr 9, 2021, 3:32 PM EDT

Posted: 2 weeks ago
Updated: 2 weeks ago

The old-fashioned way is to draw your circuit on a piece of paper and label the nodes.

Comsol does not support schematic capture. You can download free SPICE variants that do schematic capture. Comsol can import a SPICE netlist.

Posted: 2 weeks ago

I need to do more practice then to understand how to understand which node is connected to which node. my circuit is not that complex.

Let's then propose this question as well. Let's imagine I have two separate piezoelectric layers. They are creating voltage. on the electrostatic -> ground : I have boudaries 1, 2 on the electrostatic -> terminal : I have boundaries 3, 4.

My circuit is comprised of : Ground node, resistor , and external terminal. The ground node is p on node 0 The resistor is p on node 1 and n on node 0 The external ternal uses the same node as in electrostatic.

what will be the configuration to connect them in series and parallel? Do I need to swap boudaries on electrostatic?

Posted: 1 week ago
Updated: 1 week ago

Ok, Here is a rough schematic of what I am trying to do. (please see attachments)

I understood, since I had 2 bodies but only 1 solid mechanics and 1 electrostatic physics, they were not each working separatly. I made them two separate physics like * solid mechanic1 * electrostatic1 * solid mechanic2 * electrostatic2 * and then * 1 electric circuit.

Would someone please confirm if this is how I should do it?

Thanks.