Difference between revisions of "Sun Tracker or Irrigation Timer to drive motors"

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(added a photo of mine with a new $3.86us ebay H-bridge bolted to it.)
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[Update: Aug 31, 2017. This has been in use for a year and it is reliable. I had another car battery go weak after five years, so I returned the ten year-old battery and kept the "new" dead car battery. It parks the solar rotator back to sunrise position reliably every night. I do not use wall adapter power for a year now. In this era, a microcontroller could be used instead of two ICs, but then you have to program the microcontroller (and commercially product test for radio wave output for a commercial product; somebody told me so).]
 
[Update: Aug 31, 2017. This has been in use for a year and it is reliable. I had another car battery go weak after five years, so I returned the ten year-old battery and kept the "new" dead car battery. It parks the solar rotator back to sunrise position reliably every night. I do not use wall adapter power for a year now. In this era, a microcontroller could be used instead of two ICs, but then you have to program the microcontroller (and commercially product test for radio wave output for a commercial product; somebody told me so).]
  
[[File:Irrigation_Timer_Sun_Tracker_photo_of.jpg]]
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[[File:Irrigation_Timer_Sun_Tracker_photo_of.png]]
  
 
[[File:Irrigation_Timer_Sun_Tracker_motor_driver.sch]]
 
[[File:Irrigation_Timer_Sun_Tracker_motor_driver.sch]]

Revision as of 11:04, 26 December 2018

ALL MY PROJECTS ARE HERE: http://www.opencircuits.com/User:Definitionofis

This is using two LEDs to sense the sun and send +- or -+ logic signals to a full bridge motor driver like L298 or http://www.redrok.com/led3xassm.htm LED3X schematic. I bought his. I recommend it.

I changed the front end logic to 4060 and 4011 ICs here, because I want to put the sun sensor separate from the controller board so it does not weather and die again, after 8 years of use. The circuit turns on a motor for 3 seconds once every 47 seconds to move the solar panels. You could use this circuit to turn on an irrigation motor for a very short time every several hours (just omit the sun sensor and select appropriate timing pins and much lower oscillation frequency for the 4060, since 3 seconds every 47 seconds is not long enough for irrigation). [Update: Aug 31, 2017. This has been in use for a year and it is reliable. I had another car battery go weak after five years, so I returned the ten year-old battery and kept the "new" dead car battery. It parks the solar rotator back to sunrise position reliably every night. I do not use wall adapter power for a year now. In this era, a microcontroller could be used instead of two ICs, but then you have to program the microcontroller (and commercially product test for radio wave output for a commercial product; somebody told me so).]

Irrigation Timer Sun Tracker photo of.png

File:Irrigation Timer Sun Tracker motor driver.sch

File:Irrigation Timer Sun Tracker motor driver.kicad pcb

Irrigation Timer Sun Tracker motor driver.png

SolarTrackerBoard.png

I also made a simple trickle charger (below) and voltage-reduction circuit to power my motors and above circuit directly from the solar panels instead of plugging them into a wall outlet DC power supply. I am using an almost dead car battery.

DC Solar to 15vdc+trickle charge.png

File:DC Solar to 15vdc+trickle charge.kicad pcb File:DC Solar to 15vdc+trickle charge.sch