This project is a nice way of getting students to think about how much water they are using and to do something about it when showering.
When tipped up a four minute timer starts, this is shown by the blue LED flashing the number of minutes remaining every 10 seconds. i.e. it flashes four times to start with, then three, two, one until the four minutes is up.
The kit is fairly straight forward to make due to the low part count and is supplied with a pre-programmed processor.
If used daily by all members of a family the coin cell will last a number of years. The tilt switch allows for a completely enclosed case, which is required as the electronics are not waterproof.
This kit includes:
- 1 x shower timer PCB
- 1 x CR2032 coin cell
- 1 x CR2032 coin cell holder
- 1 x tilt switch
- 1 x ultra bright blue LED
- 1 x 47ohm resistor
- 1 x 1Mohm resistor
- 1 x 8 pin IC holder
- 1 x PIC 10F200 pre-programmed with shower timer code
PCB dimensions: 51mm x 34mm.
Teachers can order a sample of this kit (one per school) here.
You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2147.
Note: this service is only offered to schools for evaluation purposes only.
Coin cells should be kept out of the reach of small children as they are very dangerous if swallowed, when immediate medical intervention is required.
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- If you live on the UK mainland and don't have any large materials or lithium batteries in your order it will cost £3.95 (£4.74 including VAT) if you spend less than £40 (£48 including VAT).
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- If you spend over £200 (£240.00 including VAT, excluding large materials or lithium batteries) delivery is free within the UK.
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