Author Topic: Simulating ICs in Proteus  (Read 1335 times)

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Offline FrongachTopic starter

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Simulating ICs in Proteus
« on: October 03, 2018, 04:34:17 pm »
Hi guys,
First post here. I'm having trouble simulating ICs in Proteus. I tried even a quite basic 555 timer circuit, and still no joy. Sorry for the general question, but can you spot anything wrong in the setup attached, someone mentioned to be careful about power supply to the chip, I tried battery and injecting a voltage as here, but neither got the circuit running in any case. The output at pin 3 just stays high here by the way,
Thanks a million,
Brian
 

Offline txescientist

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Re: Simulating ICs in Proteus
« Reply #1 on: October 03, 2018, 08:23:13 pm »
Hi,

Try built-in examples. Attached you can find simulation I just made for you to test...
 

Offline bson

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Re: Simulating ICs in Proteus
« Reply #2 on: October 03, 2018, 08:45:12 pm »
Welcome to the forum!  Are all your nodes actually connected?  I don't see any connection symbols (little black circles) for the two connections next to C1 and R1.
 

Offline Rigolon

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Re: Simulating ICs in Proteus
« Reply #3 on: October 03, 2018, 08:57:29 pm »
As bson said.

C1 does not seem to be connected.
 

Offline mc172

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Re: Simulating ICs in Proteus
« Reply #4 on: October 03, 2018, 09:11:30 pm »
It's been a long time since I used Proteus which is a shame because I really liked it! I seem to remember that you have got to set an initial charge value for capacitors otherwise oscillators will not start. Not sure whether the new versions require this, though. And as others have said, connect the components.
 

Offline FrongachTopic starter

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Re: Simulating ICs in Proteus
« Reply #5 on: October 06, 2018, 01:07:48 pm »
Hi,
Thanks for your answers. I finally found that the problem was the 555 timer model in my version. I was originally trying to simulate a motor controller circuit for the TL494, and thought I'd try a simpler chip. In both cases, downloading a model was the solution..
Brian
 


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