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Open Water

This is a crack a making a water purifier for less than 20$

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1 in 9 people lack access to clean water (according to water.org). Some people like to go camping. While tons of water purifiers exist, I wanted to make a really cheap, reusable water purifier.

I did a cost analysis for my board.

Item

Price at 1

Price at 100

ATTINY 85

1.24

1.03

8 Pin DIP Socket

.18

0.11958

33 uF Capacitor

.23

.0858

1 uF Capacitor

1.54

.9502

9v Battery Snap Connector

.97

.89

5v Linear Regulator

.5

.3184

Bulb Holder

3.77

1.48

9v Battery

1.30

1.15

MOSFET

.95

.576

Slide switch

.48

.3858

Push Button

.17

.1457

UV lamp

7.72

< 7.72

Piezo transducer

.67

.42

Resistors

.25

.1

PCB board

5.65

.33

Electronics Subtotal

25.62

15.69

Board housing

1

.5

Total

26.62

16.19

 I went a little over budget for my prototype, but when I use the Digikey price at 100 for components, and use PCB way's estimate for boards, It is under 20 dollars!

View all 13 components

  • Update #2

    Becky Button10/14/2018 at 00:39 0 comments

    Sending the board to OSH Park!!!

    16.95 $ for 3 boards!!

  • Update #1

    Becky Button10/13/2018 at 23:58 0 comments

    A lot of progress has been made on the board so far!! As of today, I have completely traced out the board, and will be sending it off to OSH park later today. 

    Please note that this is only showing the front copper, so some traces are not present in this representation of the board.

View all 2 project logs

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zachary.parksey wrote 10/15/2018 at 04:01 point

Neat idea!  Is the purification provided by strictly UV from the lamp, or is the focus on the generation of ozone?  I've fiddled with the idea of miniaturized and high-throughput ozone generation, myself...using the generator for ozonolysis at work has always been an 'inspirational' process, anyway.

  Are you sure? yes | no

Becky Button wrote 10/20/2018 at 18:13 point

I was looking at purifying using the UV lamp. 

  Are you sure? yes | no

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