A simple device that can detect the water level - no moving parts and totally sealed.
See https://www.youtube.com/ralphbacon video #62
Direct link to video: https://youtu.be/aBkPAgrOHhQ
PCB $5 for 10 pieces https://www.pcbway.com
First order free! 2-sided PCB just $5 for 10 pieces. Assembly for 20-pieces just $30.
PCB Prototyping the easy way - see my video #129 for Hands-On details.
An ideal beginners' project to detect when liquid has reached a certain level. This module can be mounted at just about any angle,as I show in the video.
The best aspects of this device is that it is totally sealed and has no moving parts. The output is best detected by an analog GPIO pin but the value jumps very suddenly from the high 900s to pretty much zero.
The device fits through a hole in a water tank, water butt, pond... or anthing else that contains water or other liquid. It could even be fitted to a bracket and totally immersed. It can detect the liquid at various angles, top down, bottom up, sideways; it's really very simple.
The video contains much more detail and also discusses progress on a couple of other PCB-based projects, such as the ATMEL 328PB processor board shown here. With a huge list of improvements over the standard 328P microcontroller it's probably worth thinking about a new design for this altogether. Probably.
- Two I2C channels
- Two SPI channels
- Extra GPIO pins (at least two, up to six)
- An extra UART (Serial) interface
- Unique ID for each chip
- Supported by Arduino IDE with a simple update
(Special thanks to Michael Kurt Vogel for compiling this)
http://bit.ly/VideoList-RalphBacon
Banggood For around $4, includes free 7-20 day shipping
https://www.banggood.com/15mA-5V-Optical-Infrared-Water-Liquid-Level-Sensor-Liquid-Water-Level-Control-Switch-p-1193234.html?p=FQ040729393382015118&utm_campaign=25129675&utm_content=3897
Various other types of water level detectors from Banggood
https://www.banggood.com/search/level-sensor-liquid.html?p=FQ040729393382015118&utm_campaign=25129675&utm_content=3897
eBay (UK) but doubtless available everywhere, for around $2
https://www.ebay.co.uk/itm/Optical-Infrared-Water-Liquid-Level-Sensor-Liquid-Water-Level-Control-Switch-Te/123408781616?hash=item1cbbbc9130:g:JHkAAOSw0kFaychw
Amazon link for the Polulu 328PB board (if you find it elsewhere let me know)
https://amzn.to/2QgbHWN
Programmer for above (although others will [probably] work too, I haven't yet tested
https://amzn.to/34RulYi
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https://www.youtube.com/RalphBacon
https://ralphbacon.blog
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