Simple lighting timer circuit.

The oscillator circuit I know has both a series resistor (~100K) and a parallel resistor (~1M) which helps start the oscillator more reliably. The diodes and transistors at the end are making up a NOR gate.

Robert Beardsley

Loved the explanation.

You stole my comment! lol

If you need to remove hotglue in the future again, use a drop of alcohol and let it soak for a few seconds. it will creep under the bond and losen it right up, no force needed at all :)

Daniel Rotskas

Ah, an old classic. A touch controller for disco lighting equipment. I seem to recall they also had a sequencing function too.

Big Clive

Clive does make a cracking mentor / instructor!

Richard Boyce

You'd only need to reset that rightmost counter, not the three.

You should sell your design, looking very cheap to implement, to a Chinese manufacturer!

Paul Schuur

Hi Clive, I purchased an item today from a company I think you might have mentioned before. MODE ELECTRONICS. Unit has 12 outputs that output 0 or 6v depending on status of NAND flip flop. I don't know if it's meant to be for home automation or discolighting. The shop I got it from had a pattern/strobe lighting console in there as well, but it was too big to bring home todya. <a href="https://imgur.com/gallery/fJgw7" rel="nofollow noopener" target="_blank">https://imgur.com/gallery/fJgw7</a>

Loscha

I have some of these too. I also noted how the timers worked their way in lately. While not in direct weather contact mine did just fine being indirectly exposed for 5 months or so over this past spring and summer. -Intriguing

Michael Thompson

The version I have also has the timer but it comes with an IR remote. I have modified them to use a USB power bank instead of AA cells, this means they don't get dim as the battery runs down. And of course a huge pile of Poundland USB power banks means there is always one ready to go!

The Tinkering Shed

Pins 7 &amp; 8 are likely commoned because another version of this has the leds in both directions, it uses pwm to dim and 4 transistors to create the two channels, this gives it 7 flashy modes and one steady on mode with dimming.

The Tinkering Shed

Not boring. Definitely intriguing.

Kevin Leah (AKA Zoinks!)

ASCII? American Standard Code for Information Interchange? It pops up a lot.

Big Clive

Very interesting things. Right now I am studying computer science and have just gotten done with the binary unit and am now moving over to ASKII.