User:Definitionofis
Contents
- 1 MPPT Solar and Wind Power Boost Charge Controller
- 2 Sun Tracker or Irrigation Timer to drive motors
- 3 Wireless remote switch, button press: 1 second=ON, 3 seconds=OFF
- 4 Fridge Defrost Timer with Solar Trigger Option
- 5 Solar panel rotator motor power with auto-shut-off
- 6 Odroid XU4 Weeding Spraying Robot
- 7 Dandelion Flower Weed Wand
- 8 Li-ion battery discharge limiter
- 9 Temperature Difference Sensor and Switch for Solar Water Circulation Pump
MPPT Solar and Wind Power Boost Charge Controller[edit]
This is an analogue computer with a digital option. It is an elegant, unique idea for MPPT. I have some documentation videos and circuit inside the link. The circuit works but I never used it much because my wind turbine project stalled. I am back: April 2016.
Sun Tracker or Irrigation Timer to drive motors[edit]
This is using two LEDs to sense the sun and send +- or -+ logic signals to a full bridge motor driver. You could also use this circuit to turn on an irrigation motor for a very short time every several hours.
Wireless remote switch, button press: 1 second=ON, 3 seconds=OFF[edit]
My solar power has to be manually switched to city power at sunset in my basement. I made this wireless upstairs button, instead of running a long 120vac wire to an upstairs switch.
Fridge Defrost Timer with Solar Trigger Option[edit]
The project video shows a fridge timer which can be set to trigger during high battery voltage sunny days so the defrost cycle never uses valuable battery power. It is switchable to act like a regular defrost timer for long cloudy stretches of time, like winter.
Solar panel rotator motor power with auto-shut-off[edit]
The project video shows a way to power solar panel rotator motors from a solar panel, supplemented by a walladapter.
Odroid XU4 Weeding Spraying Robot[edit]
The project video shows the completed robot spraying weeds. I proved the prototype works, although it is impracticably slow.
Dandelion Flower Weed Wand[edit]
The Weed Wand Prototype November 1, 2024 video shows the Weed Wand detecting flowers and dropping environmentally harmless vinegar to wilt dandelion flowers.
Weed Wand is faster and more accurate than manually aiming and pulling a trigger on a pressurized pump sprayer.
Li-ion battery discharge limiter[edit]
I used a car booster battery to pump my car tires and it had no lower limit turn-off and it destroyed the Li-ion battery. I heard the air pump slow and I turned it off too late. This little device will do automatic flow-through and cut-off to protect the battery next time.
Temperature Difference Sensor and Switch for Solar Water Circulation Pump[edit]
This circuit uses two diodes as heat sensors to switch a circulation pump ON when the water on the roof solar water collector is hotter than the hot water storage tank in the house.
