[sdiy] Capacitor type matters in 74HCxx one-shot circuit ?

[Jay Schwichtenberg]

Going to start out by saying this is not as precision circuit and if you 
need concise timing there might be better circuits to look at or make Rt 
a fixed resistor and a good low drift trim pot. In one of my electronic 
classes we were told don't use one shots unless we had too.

That being said the type of capacitor will depend on the timing needed. 
Long periods may require electrolytics, can't comment on those. But for 
short periods I'd use C0G or NP0 5% or better tolerance. Make sure the 
gate chip is one that has hysteresis too.

Jay S.

On 10/9/2020 7:38 AM, Jean-Pierre Desrochers wrote:
>
> Does the capacitor type (Ct: ceramic or film) matter in a circuit like 
> this one ?
>
> I’d say film is obviously better but.. in such a circuit… ??
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20201009/17064cbb/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 69527 bytes
Desc: not available
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20201009/17064cbb/attachment.png>