[sdiy] 555-based ADSR that refuses to work with 9v

[Jaroslav Lukes]

> From: Karl Ekdahl [mailto:elektrodwarf at yahoo.se]
> Hi Jaroslav, i've tried changing the 4.7k to Reset
> since it seems the VCC feed was to low, but without

Not that,I was think about resistors with Mohm values (A/D/S/R).

> any luck. The 555's i tried are CA555CE from Harris
> and RCA, and also a NE555N from ST. Earlier i also
> tried NE556A from ST. I can't verify wheter this
> circuit does actually run from a +-15 since i don't
> have anything but a +-9V supply here (i've moved
> recently).

Hmmm. I think that you use all versions that are less or more different from
original. Use 555 from philips or TI. In my country before many years was
published list of differences between mfgr's for 555, but I could not find
it now. I was remember Philips and TI only that are good.

Regards, JL.