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DIY automatic water timer

Posted on Wednesday, August 6th, 2014 in DIY, hacks by DP

20140406_141901

Kyle wrote an article detailing his DIY automatic water timer:

Now that I have power and output figured out, I need to work on the control aspect. 555 timers are great for simple applications requiring up to a few minutes of delay. At 10 minutes, the RC values needed would boarder the danger zone of the timer not functioning correctly due to the leakage current of the capacitor and the small charge current of the resistor. I could have cascaded two or more timers together but that would be sloppy so I fell back on my trusty friend – the ATtiny micro controller. This would allow me to make changes as I want without redesigning the board.

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  • Derek: Is the Sunday one no longer a thing?
  • Doub: Just add sleeving and black variants of these 5557 and you'll take the enthusiast/gamer PC market by storm.
  • James Fowkes: This is a brilliant service, I'm sure I'll be using it a lot. An option for spade/FASTON connectors would be amazing!
  • Peter: Another sunday, another chance...
  • Louis Beaudoin: This is great work guys! Placing an order for a sample pack and hope to use the service to make a custom cable soon.