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=== Open hardware stenotype chorded keyboard === | === Open hardware stenotype chorded keyboard === | ||
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== Home Power - Off the Grid Projects == | == Home Power - Off the Grid Projects == | ||
| − | === Maximum | + | === Maximum power point trackers === |
(1) The Free Charge Controller project is a [[maximum power point tracker]]. | (1) The Free Charge Controller project is a [[maximum power point tracker]]. | ||
(2) The [[MPPT Solar and Wind Power Boost Charge Controller]] matches lower input voltages to higher 12v, 24v or 48v batteries using LTC3703. | (2) The [[MPPT Solar and Wind Power Boost Charge Controller]] matches lower input voltages to higher 12v, 24v or 48v batteries using LTC3703. | ||
| − | Maximum power point tracking | + | Maximum power point tracking helps a solar panel, wind turbine, et cetera, to achieve maximum efficiency. |
=== [[Fridge Defrost Timer with Solar Trigger Option]] === | === [[Fridge Defrost Timer with Solar Trigger Option]] === | ||
| − | The [https://vimeo.com/177809415 project video] shows a fridge timer which can be set to | + | The [https://vimeo.com/177809415 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]] === | === [[Solar panel rotator motor power with auto-shut-off]] === | ||
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=== [[Sun Tracker or Irrigation Timer to drive motors]] === | === [[Sun Tracker or Irrigation Timer to drive motors]] === | ||
| − | This is using two LEDs to sense the sun and send | + | This is using two LEDs to sense the sun and send +- or -+ logic signals to a full bridge motor driver. You could use this circuit to turn on an irrigation motor for a very short time every several hours. |
== Scoring Machine for Fencing == | == Scoring Machine for Fencing == | ||
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* Highly immune to multipath fading, interference | * Highly immune to multipath fading, interference | ||
* 5mS Channel Dwell Time | * 5mS Channel Dwell Time | ||
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== Serial Communication Protocols == | == Serial Communication Protocols == | ||
