NE555 output not working

Thread Starter

TrevD

Joined Jul 12, 2021
3
Hi
Just joined the site.
I am creating an Astable circuit with two 10k connected from pin 2 n 4 to positive. NE555 IC output with LED and resistor to ground does not work when pin 2 is touched to ground. If output is connected to positive supply it glows constantly.
Wonder, whether component is damaged or require any addional components. Please assist....
Trevor
 

Thread Starter

TrevD

Joined Jul 12, 2021
3
Hi
Just joined the site.
I am creating an Astable circuit with two 10k connected from pin 2 n 4 to positive. NE555 IC output with LED and resistor to ground does not work when pin 2 is touched to ground. If output is connected to positive supply it glows constantly.
Wonder, whether component is damaged or require any addional components. Please assist....
Trevor
Hello Eric,
There is a correction above, it sho
hi Trev,
Welcome to AAC.
Could you post a sketch showing the circuit and supply voltages etc.
E
DesignSpark PCB 10.0 wired by RS - [Schematic Design_ XXX.sch _] 12_07_2021 2_22_36 PM.png
Hi Eric,
Thanks for the reply, the circuit should be a Bi stable circuit as per sketch.
 
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