Then the solar panel is connected to the output of the charger where the battery would normally be. Keep the polarities of the positive and negative wires the same. The battery supplies a stable power source for the charge controller circuit and the solar panel acts as a variable voltage source. Start by covering up the solar panel. You can either put something over it or turn it face down. Then slowly uncover the panel. As more light hits the panel, its output voltage will go up. When the voltage reaches Then slowly cover the panel.
When the voltage drops to 13V, you should hear another click from the relay turning off. If everything is working properly, then you are done. Now you are ready to connect all the components together. First connect the output of the charge controller to the battery. Then connect the solar panel to the input of the charge controller. The relay may turn on and off a few times while the circuit is powering up. Now you have your own solar charger.
This will let you charge your batteries anywhere that has sunlight. This can be really useful for working with power tools at remote project sites. Question 8 months ago on Introduction. If I then connect the SAE connector to the charger that my drill batteries came with, will the charger act as a charge controller for the battery? Hi, thanks for sharing! How would you change this to cope with changing conditions?
I would like to use this as a mobile solution to charge a 18V power bank and ensure the device will always be pulling the maximum power available. Want to build mine with a second set of resistors and a switch to charge at two different voltages. I'll add some caps too, it'll allow those to charge while the battery is in the tool. I don't want to be one screw short at dusk with no juice.
Thank you. Reply 4 years ago. Reply 5 years ago. I just ordered the parts to make one. Can you please let me know, while charging the batteries the cooling fans and a pump can run charging while the system is in use.
I want to use it for lead acid batteries also will it harm the batteries? Reply 7 years ago. Different batteries need to be charged to different voltages and at different rates. I designed this charger for use with NiCd batteries. So for safety, I am saying that it should be used with NiCd batteries. The charger would probably be fine to use with other types of batteries. I am just being extra cautious. Proceed at your own risk. Ive put led instead of relay and i set to reset at 10v and cutoff at Reply 7 years ago on Introduction.
More by the author:. About: My name is Jason Poel Smith. Here is one simple example of how to make a DIY charge controller. Did you make this project? Share it with us! I Made It! Lazy Susan 2. Tea-light Lantern by ruths in 3D Printing. Answer Upvote. Reply Upvote. Thanks again! Try checking out this tutorial on how to read a circuit schematic.
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