Project by James46717; Simple Relay Timer

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I’ve just shared a new project: “Simple Relay Timer”



This project started because I needed to replace a water tap timer that had seen better days. The aim was to use a Raspberry Pi Pico and a couple of PiicoDev boards to do what the water timer did…


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What water valve did you use?

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Device is relay contact output, and switched 24VAC plug pack connected to 240VAC mains.

image

  • Working pressure 20-1400 kPa
  • Internal filter to reduce risk of valve blockages
  • Australian made
  • 24 Volt AC, 50 Hz

https://www.bunnings.com.au/pope-13mm-mini-barb-valve_p3130657

Cheers
Jim

1 Like
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This could be updated now to use one of DF Robot’s latching relays so even less power is used while the timer is on…

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Hi James,

A non-latching relay could certainly be subsituted in here. DF Robot’s Gravity Relay has a wiki with a wiring diagram and some example code. You would just need to use another GPIO pin to get going.