Simulation troubleshoot - help needed

[Jevgenij]

Hi!

What I'm trying to do is simulate a PWM controlled LED driver.
But when I try to simulate, I get different errors, like this one:

Code: Select all

[SPICE] transient GMIN stepping at time=4.54747e-018 @00:00:00.000000
[SPICE] transient GMIN stepping at time=1e-018 @00:00:00.000000
[SPICE] TRAN: Timestep too small; initial timepoint: trouble with node #D5_H4#branch. @00:00:00.000000

Here's the circuit I'm trying to simulate:
CIRCUIT
And here's the circuit where I left only the LEDs and one resistor, but I still get errors when I try to simulate:
CIRCUIT
Schematics as Proteus projects attached.
Any help would be appreciated.

[Ettore]

Unfortunately you are using an illegal copy of the software so we can't provide any support. Please purchase a licence from https://www.labcenter.com/pricing/comm/ Any Started Kit would be more than suffice for the simulation of such the circuits.