phoenix-ni
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phoenix-ni Update on my review: it was as I suspected, except that the pot required to restore the timing ranges to those specified is 500k,not 100k. Quite a fair margin of error in the component selection - I could see through a 103 being fitted instead of a 104, but instead of a 474 is more than a little mistake. Anyway, these work well once you change the pot - I used Bourns 3362P-1-504LF - about 0.60Stg,and widely available. Just be careful when removing it - I lifted one of the pads and some track.

phoenix-ni 07/12/2016
I too have the timing issues. The interesting thing is that the lower end timings are pretty close. I think what hashappenede isthat the wrong pots have been fitted as they seem to make virtually no difference at all. Thus I have ordered some Bourns 100k, 500k and (just in case!) 1M pots. I'll replace them and report back in a week or so. This should work - and indeed it half does, it should be
12V Power On Delay Relay Module Delay Circuit Module NE555 Chip
12V Power On Delay Relay Module Delay Circuit Module NE555 Chip
US$8.99 US$10.99
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