Hey all,
I am trying to make a simple circuit to indicate the
status of two switches with one LED.
I have attached the circuit for review.
Operation desired is as follows:
SW2 grounded, SW1 open; LED on continous.
SW1 grounded, SW2 open; LED flashing.
SW1 grounded, SW2 grounded; LED flashing.
I have simulated and breadboarded it as shown and it
seems to work as needed, but was wondering if I have
made any errors that would be the cause of unreliability
or shorten the lifespan of any of the components.
I am particularly wondering about:
1. switching the 555 timer on and off using ground.
2. using Q1 to keep Q3 from turning on.
3. connecting emmitters of Q2 and Q3.
I'm inexperienced at circuit design so to get any advice would
be an honor for me.
Thanks for looking.
P.S. Love the AAC e-books and all the advice given here.
I am trying to make a simple circuit to indicate the
status of two switches with one LED.
I have attached the circuit for review.
Operation desired is as follows:
SW2 grounded, SW1 open; LED on continous.
SW1 grounded, SW2 open; LED flashing.
SW1 grounded, SW2 grounded; LED flashing.
I have simulated and breadboarded it as shown and it
seems to work as needed, but was wondering if I have
made any errors that would be the cause of unreliability
or shorten the lifespan of any of the components.
I am particularly wondering about:
1. switching the 555 timer on and off using ground.
2. using Q1 to keep Q3 from turning on.
3. connecting emmitters of Q2 and Q3.
I'm inexperienced at circuit design so to get any advice would
be an honor for me.
Thanks for looking.
P.S. Love the AAC e-books and all the advice given here.
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