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Digital Open-Close Timer
A digital timer to open and close doors and shade cloth for greenhouses.

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Digital Vent Controller
A "reboot" of my analog openers. For controlling the tempurature in a greenhouse.

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Mark 3 Digital Tracker
I have taken the best features of my other trackers and designed this one, using a micro controller to add features not available with my analog trackers.

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Digital Remote Sensors
This is a remote sensor for the digital tracker boards I sell, see my the other items in my store below. These will not work with the Analog boards. These will plug directly into the 12V High Power boards I sell, and they can be wired (with some minor work) into standard tracker boards I sell. All new batches of my regular boards will also accommodate direct plug in of this remote sensor.

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Weather Enclosure
This is a heavy duty glass dome jar with a custom printed base to mount my trackers.

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Digital Differential Thermostats
Digital Differential thermostat for your solar project. Digital display of current temp on both sensors, current differential, and setpoint differential.

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Versapak Smart Charger Mark II
This is a "drop in" board that will replace the circuit board inside a Versapak VP130 dual charger and make it into a "smart" charger (also a fast charger). This is a kit, and requires some minimal soldering skills. The board is fully assembled and tested, but you will need to swap the battery clips from your sacrifical charger, as well as solder the power supply to the board. Full installations instructions at the link.

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12V Analog Tracker
This solar tracking controller will drive a motor to position anything you want to follow the sun on a single axis. It can be used to position solar cells, a reflector to heat water, or anything else. The controller is mounted on the object to be steered with the sensors positioned along the rotational axis. Using most any D.C. motor up to a maximum of 12 VDC @ 4 amps, it can easily cause a solar collector, reflector or array to follow the sun through a single axis. Motors suitable for this system can move quite large loads as long as proper gearing or lead screws are used. The controller uses a differential sensing approach and can drive the motor in either direction. There is no "reposition for the morning" electronics, but I intentionally used sensors with a wide field of view. In the morning the "east" sensor will trip and the controller will position to point at the morning sun. This controller will work with 12V motors, solar panels, and batteries

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12VHP Analog Tracker
This is a high power version of my regular 12V solar tracker. This functions exactly the same as my regular tracker, but will handle twice the current. I have tested these continuously at 10A with no issues at all. If you need even more than 10A from your tracker, you can always purchase my relay module, which will handle up to 30 amperes. This will easily run a high power actuator for your solar tracker. These boards have a user replaceable fuse, and provisions for use of the remote sensor I also sell. If you are running these near their power limit, you will need to insure proper airflow over the board.

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24V Analog Tracker
This is a 24V version of my regular 12V solar tracker. This functions exactly the same as my regular tracker, but will handle twice the voltage. Please note that one of the tradeoffs for being able to handle higher voltages is not being ablt to handle the high current. This board will handle actuators and motors with a stall current of under 1.5A. This will easily run a small actuator for your solar tracker. If you need more than 1.5A from your tracker and want to run at 24V, you can always purchase my 24V relay module, which will handle up to 15 amperes.

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36V Analog Tracker
This is a 36V version of my regular 12V solar tracker. This functions exactly the same as my regular tracker, but will handle three times the voltage. Please note that one of the tradeoffs for being able to handle higher voltages is not being ablt to handle the high current. This board will handle actuators and motors with a stall current of under 1.5A. This will easily run a small actuator for your solar tracker. If you need more than 1.5A from your tracker and want to run at 36V, you can always purchase my 36V relay module, which will handle up to 15 amperes.

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Analog Remote Sensors
This is a remote sensor for the analog tracker boards I sell, see my the other items in my store below. These will not work with the Digital boards. These will plug directly into the 12V High Power boards I sell, and they can be wired (with some minor work) into standard tracker boards I sell. All new batches of my regular boards will also accommodate direct plug in of this remote sensor.

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Relay Booster Modules
Some people who buy my tracker boards want to run BIG motors with them. I always say: "This can be wired to control relays to move arbitrarily large motors", and I provide this link for directions on how to do this here. However, some don't want to wire the relays themselves. For these I have provided this relay module. This should be used when you are wanting to run BIG motors with my trackers.

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Differential Thermostats
Differential thermostat for your solar project. I use one of these to trip the fan in my solar lumber drying kiln, but they have many uses. Building a solar hot water system? This will work perfectly to turn your pumps on.

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Temperature Probes
This is a remote temperature probe cased and potted, puts out 10mV per decree C. Works with the differential thermostat and the thermostatic opener in my store below. I will combine shipping if you purchase this with one of those. You will need to extend this with piece of wire to whatever length you need.

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