Electronic dunce here.
I would like an IR system to do the following.
I want to monitor a water tank (250 x 350 mm) using IR sensors laid out in a grid pattern with LEDs spaced roughly 30 mm apart, 7 on the X axis and 10 on the Y axis.
When the sensors detect droplets it lights up the corresponding X and Y LED.
The LEDs will be mounted on the edges of the tanks top face, so any lit LEDs can be visually seen.
The PCB is powered by an appropriate mounted battery and I would also like a reset button to turn off any lit LEDs.

I am willing to pay for a working design/prototype. Hope this is ok with the admin here, I couldn`t find a link to forum rules.

 

hi code,
Are you detecting 'forming' droplets on the face of the plate or droplets falling in free space, from the plate/area ?
E

 

Thanks for your reply, I was just watching Wales U20 v Argentina. Great game.
I want to monitor droplets falling not gathering under the face.
Cheers

 

hi code,
Most LED's have a wide beam 'cone' of illumination, there are low cost miniature laser diodes that have a very beam, which can be detected by IR detectors.
E

Added link.

https://www.amazon.co.uk/WPERSUVV-1...&sprefix=low+power+laser+diodes,aps,80&sr=8-6

 

I was initially hoping to only use 2 sensors.

 

QUESTION: Initially the stated concept was an "X-Y grid, but the drawing shows what looks to me like something rather different. That implies wider beam widths and a lot more logic. So I am asking for a more detailed description of exactly what sort of resolution the TS is seeking, and also what sort of scanning logic is anticipated.
Sensing a momentary event with angled beams is quite different.

AND, please describe to us the purpose of such a system.

 

If I am not mistaken the 2 sensor scanning system would require a micro controller or Arduino where as I am hoping for a self contained analog system. Powered from a single battery.
If a 2 sensor system is possible the resolution would be to hit a target roughly 30mm square within the 10 x 7 grid pattern.

 

If I am not mistaken the 2 sensor scanning system would require a micro controller or Arduino where as I am hoping for a self contained analog system. Powered from a single battery.
If a 2 sensor system is possible the resolution would be to hit a target roughly 30mm square within the 10 x 7 grid pattern.

OK, that does not seem at all similar to what post #1 requested. But now I see that it was the LED array that was to be 10 by seven. The sensors will need to be line-scan video types with a fairly fast scan rate. The logic required will be a bit more than one of those simple systems.

 

I think an Arduino compatible water sensor will be better than IR.

 

With two non-scanning sensors just what sort of information would be provided that will describe the angle toward any sensed drop??Impact sensors can measure the time from a impact to receiving the signal. So possibly with four impact sensing sensors there is a chance.