Motion Sensor numitron clock

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5 months 2 weeks ago #11170 by Xntrix
Replied by Xntrix on topic Motion Sensor numitron clock
In my case it seems to come down to the power supply. I have had the clock in the pictures working perfectly for 2 days now. I found a large PSU from an old router - it is rated at 5.1V @ 3.1A. The sensor is behind wood and bark of the case, and works fine up to about 3 -4 metres.

Thanks to everybody for the help with this. David
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5 months 2 weeks ago #11171 by Ty_Eeberfest
Thanks for pointing out the problem and getting discussion started. I have one question: on the clock pictured, are you using a "date slots" effect?

Look into it later when the dust is clearing off the crater.

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5 months 2 weeks ago #11172 by Xntrix
Replied by Xntrix on topic Motion Sensor numitron clock
Yes, using "wipe in, wipe out" effect

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5 months 2 weeks ago #11173 by Ty_Eeberfest
Thanks. I was just wondering because in my testing I think I'm seeing two separate issues: overall low voltage causing random false triggers, and high voltage spikes causing false triggers every time the slots effect runs. Apparently your good power supply can cope with both.

Look into it later when the dust is clearing off the crater.

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3 months 2 weeks ago #11392 by Ian
Replied by Ian on topic Motion Sensor numitron clock
The microwave sensor is very, very sensitive to voltage fluctuations.

I am using a PIR detector at the moment, and have ordered some prototype boards with a Zener based 4V7 regulator on it.

The PIRs work fine, the microwaves are WIP at the moment... Sorry.

The only other thing I have found is that the quality of the 5V supply is important. I have a couple of clocks that work perfectly with the microwave, and some that don't. The problem appears to move with the supply rather than the clock...

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3 months 2 weeks ago #11432 by Xntrix
Replied by Xntrix on topic Motion Sensor numitron clock
Today I tried 3 different supplies on the clock in the previous post. They range from the large 5.1v 3A supply to a random Ebay 2.A , and finally to a £1.00 usb supply from Poundland. All are working perfectly! Over the next couple of days I will try to do the same with the other two clocks I have. Strange!

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