Category Archives: solar

Smart DC Tester Better than a Dummy Load

Testing DC supplies can be done in many ways, from connecting an actual load like a motor, to using a dummy load in the manner of a big resistor. [Jasper Sikken] is opening up his smart tester for everyone. He is even putting it on Tindie! Normally a supply like a battery or a generator would be given multiple tests with different loads and periodic readings. Believe us, this can be tedious. [Jasper Sikken]’s simulated load takes away the tedium and guesswork by allowing the test parameters to be adjusted and recorded over a serial interface. Of course, this can …read more

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Posted in battery, dc, generator, Microcontrollers, power supply, solar, solar cell, supply, tool hacks | Leave a comment

Mendocino Motor Drives Cubicle Conversations

Mendocino motors are solar-powered electric motors that rely on pseudo-levitation.  The levitation comes from magnets mounted on either end of the shaft, which repel same-field magnets fixed below them into the base.  When light shines on the solar panels, current flows through connected magnet wire windings, creating an electromagnetic field that interacts with a large stationary magnet mounted underneath. These constantly repelling forces spin the shaft, and the gaps between the solar panels provide the on-off cycle needed to make it spin 360°.

As [Konstantin] discovered, building this simple motor and getting it to spin depends on a lot of …read more

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Posted in electromagnetic fields, how-to, mendocino motor, solar, solar hacks | Leave a comment

Friday Hack Chat: Energy Harvesting

Think about an Internet-connected device that never needs charging, never plugs into an outlet, and will never run out of power. With just a small solar cell, an Internet of Thing module can run for decades. This is the promise of energy harvesting, and it opens the doors to a lot of interesting questions.

Joining us for this week’s Hack Chat will be [John Tillema], CTO and co-founder of TWTG. They’re working on removing batteries completely from the IoT equation. They have a small device that operates on just 200 lux — the same amount of light that can be …read more

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Posted in energy harvesting, Hack Chat, Hackaday Columns, RF, solar | Leave a comment

Innovating A Backyard Solar Battery System

Ever on the lookout for creative applications for tech, [Andres Leon] built a solar powered battery system to keep his Christmas lights shining. It worked, but — pushing for innovation — it is now capable of so much more.

The shorthand of this system is two, 100 amp-hour, deep-cycle AGM batteries charged by four, 100 W solar panels mounted on an adjustable angle wood frame. Once back at the drawing board, however, [Leon] wanted to be able track real-time statistics of power collected, stored and discharged, and the ability to control it remotely. So, he introduced a Raspberry Pi running …read more

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Posted in Arduino Hacks, ATmega168, battery, control, deep cycle, panel, power, Raspberry Pi, remote, solar, solar hacks | Leave a comment

Autonomous Transatlantic Seafaring

[Andy Osusky]’s project submission for the Hackaday Prize is to build an autonomous sailboat to cross the Atlantic Ocean. [Andy]’s boat will conform to the Microtransat Challenge – a transatlantic race for autonomous boats. In order to stick to the rules of the challenge, [Andy]’s boat can only have a maximum length of 2.5 meters, and it has to hit the target point across the ocean within 25 kilometers.

The main framework of the boat is built from aluminum on top of a surfboard, with a heavy keel to keep it balanced. Because of the lightweight construction, the boat can’t …read more

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Posted in autonomous boat, iridium, microtransat challenge, open hardware, robots hacks, solar, The Hackaday Prize | Leave a comment

Hackaday Prize Entry: WiFi ePaper

[Frank Buss] designed an electronic version of a sticky note: a WiFi enabled, solar-powered ePaper, with magnets embedded in the casing. It’s based on the new ESP32, and the idea is that you can update it via your smart-phone or over the internet via a cloud app to show any message you want. Being an ePaper display, the power consumption is greatly reduced, at least if you are cautious using the ESP32.

The final version plans to poll a server once per hour to get a new image to display. Depending on the final size and battery constraints, our guess …read more

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Posted in epaper, ESP32, solar, The Hackaday Prize, wifi | Leave a comment

Robot Lives in Your Garden and Eats the Weeds

You can’t deny the appeal of gardening. Whether it’s a productive patch of vegetables or a flower bed to delight the senses, the effort put into gardening is amply rewarded. Nobody seems to like the weeding, though — well, almost nobody; I find it quite relaxing. But if you’re not willing to get down and dirty with the weeds, you might consider deploying a weed-eating garden robot to do the job for you.

Dubbed the Tertill, and still very much a prototype, the garden robot is the brainchild of some former iRobot employees. That’s a pretty solid pedigree, and you …read more

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Posted in garden, green hacks, line trimmer, robot, robots hacks, roomba, solar, weed, weeding | Leave a comment

Solar Powered Camper is a Magic Bus Indeed

There’s no doubt that Volkswagen’s offerings in the 1960s and early 1970s were the hippie cars of choice, with the most desirable models being from the Type 2 line, better known as the Microbus. And what could be even hippier than
converting a 1973 VW Microbus into a solar-electric camper?

For [Brett Belan] and his wife [Kira], their electric vehicle is about quality time with the family. And they’ll have plenty of time, given that it doesn’t exactly ooze performance like a Tesla. Then again, a Tesla would have a hard time toting the enormous 1.2 kW PV panel on …read more

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Posted in array, camper, car hacks, charge controller, classic hacks, electric vehicle, Kombi, pv, solar, Type 2, van, vw | Leave a comment

PassivDom: Mobile Homes for Millenials

In many parts of the world, living in a trailer has gained a social stigma. We’re talking about a rectangular building placed on three wheels and towed to your preferred plot of land. It’s going to take a lot to break that social stigma, but this is a pretty sweet attempt.

PassivDom is an off-grid home. It sidesteps the electrical grid as well as water and sewer service. It’s marketed as utilizing revolutionary breakthrough in wall insulation which they claim makes it very easy to heat and cool. In addition to this self-sustaining angle, it taps into the tiny home …read more

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Posted in home hacks, mobile home, modular home, off grid, PassivDom, solar, tiny houses, trailer | Leave a comment

Solar Controller Reverse Engineered In Both Directions

[Jared Sanson] has a solar power setup on his beach house, consisting of 6 panels and a 24V battery bank, supplied by Outback Inc. Their chargers and inverters pair over a seemingly proprietary connection with a controller known as the MATE. The MATE has a standard serial output which gives some details about the operation, but [Jared] wasn’t getting the detailed information they could get from the controller’s screen. This meant it was time to reverse engineer the proprietary connection instead, which [Jared] calls MateNET.

The controller interfaces with the chargers over a Cat5 cable. [Jared] initially suspected RS-485, but …read more

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Posted in outback, outback mate, serial, solar, solar hacks, solar power | Leave a comment