ARDUINO MPPT SOLAR CHARGE CONTROLLER (Version-3.0) After lot testing we observed that MOSFET ( Q3 ) in ver-3.0 design is burning repeatedly.We tried to modify the existing software but not find any satisfactory result. The other problem was that MOSFET Q1 ( in V-3.0) conduct even when there is no solar input. To solve the above problems and enhance the power handling capability we are modifying both the hardware and software.This is named as Version-3.1 Charge Controller. This version is not completed yet.So wait until it is complete. Don't worry we are making a solution for those who have made the V-3.0 prototype.After little modification we will able to use the new software. You can see the updates on Hackaday.com This version have 3 options. 1. 5 Amp version : T94-26 toroid, 48 turns of AWG20 wire to give 135 uH (it takes almost 1.5m of wire) Q1, Q2 and Q3 all pairs of IRFZ44N MOSFETs (6 in all). C1 will be 3 * 220 uF low ESR capacitors in parallel, C2 will be a single 220 uF low ESR capacitor 2. 8 Amp version : 3 10 Amp version :
6V Solar Battery Charger Circuit - Electronic Circuit Projects In this post we discuss a simple 6V solar battery charger circuit with an automatic cut-off feature using 4 way LED indication, and an overcurrent protection. The system can be operated through a solar panel or via an AC/DC mans adapter unit. The idea was requested by Mr. Bhushan Trivedi.The RequestDear Swagatam, Greetings, I trust you are well. I am Bhushan, and I am working on a hobby project currently. I am very impressed by the knowledge you share at your blog, and was hoping if you would like to guide me a bit with my project. My project is around charging a 6V 4.5 Ah sealed battery with grid and solar panel. Actually, the battery will be kept in a box. and box will have two inputs for battery charging. There will not be any automatic switchover. I am attaching a short problem statement along this email for your reference. I am keen to hear from you on this Kind Regards, Bhushan The Design The required 6V solar battery charger circuit can be witnessed in the diagram presented below.
BLDGBLOG REUSE YOUR OLD LAPTOP BATTERY TO MAKE A POWER BANK Few months ago my Dell laptop battery did not work.Whenever I unplug it from main AC supply,the laptop switched off immediately.After few days of frustration, I replaced the battery and kept the dead one (as per my laptop message) for tinkering.I was curious what I would find inside it.Then I go through several blogs and forum to get some ideas.I got lot of things from Then I took apart the battery and charged them by using a good charger.By luck I found 4 batteries are in good condition. I used this battery to make a descent power bank.It really works fine for me.I thought I'd share the info to all.So that any one reuse it without throwing it in to the dust bin. In this tutorial I will show you, how to harvest the 18650 battery from any of the old laptop battery pack you might have. Most of the time, laptop battery packs go bad when just one or few cells in the pack are dead.
DIY thermoelectric device charges hiker's smartphone (Phys.org) —Whether you're in a city café hunting down a spare outlet or camping and worrying about losing outside contact, the problem is the same, a smartphone about to lose power just when you need it the most. What to do? A problem-solver who is into hiking and backpacking has an answer. He shows, step to step, how to construct a portable thermoelectric emergency generator. David Johansson, who used the project-sharing site Instructables for his step by step instructions, explained how he arrived at the idea, construction, and results. Spending several days hiking in the wild at times, he would rely on his smartphone with GPS, along with spare batteries and solar chargers. "The sun in Sweden is not very reliable," he wrote. Error loading skin: Error loading file In thinking up alternatives, he considered the idea of producing electricity from heat for USB gadgets. "I´m using a thermoelectric module, " he said, "also called Peltier element, TEC or TEG."
Solar Panel Charging Rechargeable Batteries I made a weather station to continuously monitor daylight and temperature. Since the project is placed away from the house, it is more convenient to use a battery to supply power, rather than a long extension cord. During the day, the weather station should run from a solar panel as much as possible to avoid consuming the battery. And, rather than a person occasionally checking on the battery levels and replacing the batteries, the circuit should recharge the battery pack from excess solar energy from the solar panel. This article describes the solar and battery backup circuit, along with the recharging results so far. Simple Solar Circuit Schematic of a simple solar-panel based circuit. A solar panel is on the left side of the schematic. The device itself contains the usual power supply circuitry, such as capacitors to stabilize the power source and a voltage regulator to establish a voltage level usable by all of the chips and other components. Simple Solar Circuit with a Battery Back-Up
EcoRenovator - View Single Post - DIY ventilation heat exchanger Thanks Ryland A small air-air heat pump (like an old A/C unit) could be hooked up after the heat exchanger, increasing the amount of heat transfered, or reducing the temp difference on both sides of the AC, depending on how you look at it. In fact, there will already be a heat pump in the system we are planning, it will transfer heat from waste air to the hot water tank. I looked around and found a few pics. And here is how it works: Here is a homemade plywood construction that uses 2 cross-flow recuperators in a counter-current set-up (increasing efficiency): Here's the inside of a large area, counter-current heat exchanger: It is made of scores of thin sheets of copper or aluminum, stacked 4-5mm apart. Here is a pictures of someone's finished project: You can see the smaller diameter bypass for when you do not want to lose/gain heat.
Making Your Own Solder Paste Stencils Making Your Own Solder Paste Stencils Skill Level: Intermediate by Paul Smith | October 25, 2012 | 57 comments Overview Surface mount components often intimidate people. For me, making the jump from breadboards and perforated PCB to creating schematics in Altium and using a PCB mill was huge. When I was hired at SparkFun, I made the switch from Altium to Eagle, and instead of milling my PCBs, I had easy access to BatchPCB. Recently, however, I started designing a PCB that has lots of LEDs, lots of rotary encoders, and lots of outputs to relays. There was still one problem though, how to solder the SMD components. We had heard rumor of people creating their own stencils using vinyl sheeting and a plotting cutter. In this tutorial we are going to talk about making solder paste stencils out of board files in Eagle. Requirements For this tutorial, I will be using the following software: And hardware: Note: Adobe Illustrator is not required. Step 1 – Design your PCB and get it made Step 6 – Cut!
Hacked Gadgets – DIY Tech Blog deba168 from India designed and built this Arduino Solar Charge Controller to provide electrical power in areas where the grid can’t always provide power when needed. Code and schematics are provided so you can get some inspiration from the design. ”At first the charge controller will check the solar panel voltage and compare it with battery voltage ,If it is greater then the Arduino will starts sending pulse width modulation(PWM) signals to the mosfet(Q1) in order to charge the battery .When the solar panel voltage was below the battery voltage ,this pwm signals will not send by Arduino . Then next the micro controller will check the battery voltage ,if the battery voltage was below 6.96 v volts then the battery will be charged in boost mode ,that mean the battery will be charged with maximum amperage ,this boost mode of charging will be done by sending pulse width modulation signals with 95% duty cycle .
How to build a Solar Panel These Satellite Images of Earth "Breathing" Are Freaking Me Out It freaks me out that tiny atoms and huge solar systems consist of things rotating around each other in a similar way. It's also weird to see time-lapse footage of human beings building things (like that super-fast hotel build in China) and realize how insectoid our activities look when sped up. And above you see the latest strange big/small connection: The planet Earth resembling a beating heart or a breathing being. A guy named John Nelson runs the UX Blog, which covers user experience, mapping and data visualization for parent software company IDV Solutions. Nelson pulled twelve rare, unobscured-by-clouds images of our planet off of NASA's Visible Earth catalog taken at different times of the year. Stitching them together into an animation, he made the visually stunning discovery you see here: As the seasons change, the ebb and flow of snow and greenery makes our little rock look like it's breathing. There's one thing, however, that we're on the same page about.