Charles_Smith

Brilliant Mike, many thanks, I can see you got the idea. This control circuit is part of a project which I am involved in with students from our local further education college to build a wood drying kiln; their budget for bits it very limited so I think I will try out you DIY circuit which looks very simple and I

Many thanks, I have some electronics knowledge (from many years ago) so I

Hi, I would to build a simple circuit, using a logic out from a control circuit, to turn on a low power relay for a given time period (about 30 seconds) then turn it off for about the same time interval, and after this cycle reset to sample the input again. I thought that I should a simple 555 timer circuit, but I would very much appreciate some help in getting the design right. Many thanks Charles