modified 8 years ago

Power supply

01:58:00

Can't find a solution? Why? Every other spice simulation I tried works with this circuit. Any suggestions? It doesn't like the transistor for some reason. If you start the simulation with the switch to the left it won't find a solution but if you start it with the switch to the right and then change it while it is running the simulation works fine.

published 9 years ago

2ctiby

9 years ago

Turn the source ac setting volts down from 20v dc to zero...it then works. Then tap any part to obtain the oscilloscope. Then alter the oscilloscope timescale to 50mS. Save that and you are ready to go and alter....it doesn't like that 20v in this setup.

2ctiby

9 years ago

Notice then that current of many amps at the transistor base is flowing the wrong way through the transistor...so not surprsing that EC does not like this.

avid0g

9 years ago

I tried adding a base - emitter shunt resister. Seems to analyze fine.

2ctiby

9 years ago

@avid0g Yes, I have just put a 20k resistor on the base and that seems to solve the high amp overload problem there. Well done.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.