| Electronics > Beginners |
| Can you build a better (dumb) leak detector? |
| (1/1) |
| joeyjoejoe:
So, obviously these things are quite cheap, approaching 5CAD on AliExpress. Some potentially better variants are hitting closer to 8CAD on Amazon. (https://www.amazon.ca/Instapark-IN07A-Water-Sensor-3-Pack/) I'm wondering if I can make a better one. I'm envisioning a tiny PCB - bottom side is exposed traces to detect. Top is a tiny MCU (Attiny45/85?), piezo/buzzer of sorts, and battery. For the 555 crowd - MCU, as having low battery detection and beeps from a simple ADC would be imperative. The battery becomes a bit of a challenge: - CR2032 could last ages, until it needs to beep for 8 hours (assuming a leak immediately after leaving for work) - 9V makes the device rather thick - AA would allow for rechargeable, nice on the wallet, but two minimum to run MCU at ~2.8V. Another potential challenge is obtaining a good volume of beeper for low cost, and at what voltage does it need to be driven. Of course, it's a fun project, which is always a bonus! |
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