Eric Fossum / Mbed 2 deprecated SprinklerTimer

I needed a device to time my sprinklers, because I had been forgetting to turn them off. So I made a very simple program to turn them off after 45 minutes. Future versions will have an array of outputs, so you can run sections with one button push. Hardware: Either board should work, I used the LPC1768. You will also need a solenoid to control the water, I am testing a 12V rainbird valve with a relay and 12V power supply.

Dependencies:   PinDetect mbed

Sprinkler Timer

I needed a device to time my sprinklers, because I had been forgetting to turn them off. So I made a very simple program to turn them off after some number of minutes.

Hardware

• Tested on the LPC1768
  • Either board should work
• You will also need some way of controlling the flow of water (like a solenoid valve and a relay). My test equipment:
  • 12V Rainbird valve (Rain Bird 3/4-Inch Sprinkler System Automatic In-Line Valve)
  • relay (SainSmart 2 channel relay)
  • 12V power supply (Replacement LCD Monitor Ac Adapter 12v 5a)
• Some Button for start/stop
• Some way of powering the board (maybe someone can help me power it from the 12v supply)

Connections

Button:

• One side to pin 5
• the other to Vout

Relay:

• Vcc to Vout
• Gnd to ground
• IN1 to pin 6

Directions/Use

• The button will start the sprinkler when it is off and vice versa.
• Once started if not interrupted, the sprinkler shall run for 25 minutes.

Future

Future versions will have an array of outputs, so you can run sections with one button push.

http://mbed.org/users/AjK/code/PinDetect/#cb3afc45028b