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| Bistable Flip/Flop circuit second LED required. (Solved). |
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| Jim-0000:
I have this little circuit wired up and operational for indicating the state of a device which will be either activated or not. http://www.circuitbasics.com/555-timer-basics-bistable-mode/ It is working and doing part of the task required. It shows the LED on until it is triggered via a 4N25 opto coupler. All good. Except that the user would like a (different colour) light on when the 555 flip flop was in the other (or second) state. Can someone advise where a second LED should be wired into this circuit to indicate the alternate stable state please? Jim. |
| Zero999:
Connect another LED between pin 3 and the positive power supply, via a suitable current limiting resistor. |
| Jim-0000:
Thanks for the prompt reply. I will give it a try this morning. Edit: I just tried it as suggested by zero and it all works fine! I'll mark this thread as solved. |
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