solar

Hi Im a complete novice here, very new! My history is Im a paramedic but recently diagnosed with autism (lots of social issues for me!). But I often get an intense interest in certain areas (autism!). What I really want to do is try and build a few low voltage electronic circuits. 1/ A...

Hi folks I am trying to build a circuit which will govern the speed of the fans in my solar cabinet based off the temperature inside. https://www.circuits-diy.com/temperature-controlled-fan-using-555/ I built this circuit hoping it would work with 6x 24v / 0.08A PC fans (40mm) I have 3 of...

I have a solar pane that gives about 12 volt and 120 mah and I want to make a 3.7 v battery charger. I dont have a voltage regulator I just have transformers, resistors and capacitors ect. and I dont have a much knowledge about electronics. Please can you send a circuit? Thanks.

I want to build one of these, I know I can build one but we all know there is no fun to be had there. I am thinking either pico-w or ESP32 with a web frontend, for the bit I know less about some questions 1/ For the solar panel is there anything I need to be aware of? Waterproof, power etc or...

Hello, I need to repair this PCB. Do you think this board can be repaired without having access to a diagram? From the image what components do you think are burned? I'm a newbie, but where I live I cannot find any place where to repair circuits and I cannot have a replacement board because...

So I've got a game cam and a 5V 4W panel that I'd like to add to the cam to help maintain the 8 AA's a bit longer. The cam holds 8 AA's but only runs off 4 meaning 6vdc. I haven't taken it apart yet so I'm unsure how it handles the other 4 batteries.. electrically speaking. Anyway so the idea...

Hi, I am looking for some advice - I have a CCTV system running in my garden workshop using approximately 11W, running from a small UPS connected to mains power. On the roof I have a 19V 40W solar panel connected to a charge controller charging 12V battery. That is hardly being used so I want...

Greetings fellow electro-heads! First-time member/poster here, so I'm hopeful for a warm welcome! =) I am currently designing a fun personal-vehicle project involving an electric catamaran/quad amphibious vehicle, and I am reaching out for some advice about the powertrain possibilities for a...

Yeah, so I'm using the XL4015 with a 100w solar panel. I have the XL4015 set to 7.35vdc to charge a SLA 6v lantern battery. The diode is working, but the current is limited to 200mA, instead of the full 300+ mA it would get if there was no 1N5822 diode in series, to prevent the darkness at...

Hi, I have a project that i would like to complete. i need to activate an LED light outdoors, whenever a designated vehicle comes within 200-300metres of the LED light. i was thinking of using a simple 12v FM radio transmitter on the vehicle. the LED would have an FM radio reciever tuned to...

Hi all, I have a Solar LED Light that is not working, and I want to use this to get back into electronics a little. I'm a Control Systems designer, but this level of electrical work still creates a lot of confusion for me. So I am hoping to use this as a learning project. The board is a...

Hope you all are staying safe and healthy. The Pandemic lockdown has forced us to work with the only components we have at home. I am working on a battery-operated esp32 pico board having other sensors hooked up to it that need 5v of supply. So I connected two rechargeable 3.7v Li-Ion batteries...

Hi, I want to rotate the motor directly with solar. My aim is to change the speed of motor depending on amount of light on the solar. I do not wish to use any other power supply. I want the motor to rotate solely with Solar only. this is a very small project for high school students. What I...

Background I'm working on a seismic alert network and seismograph station at my school in Puerto Rico. We're building a solar system for the system to continue running during a potential seismic event. The system only consumes about 10 Watts, but with the satellite internet equipment it might go...

Hi guys, I was looking for a few ideas for how to efficiently "power share" - the scenario is: I will have some DC grow lights, about 36V (but this can be changed) 100w+ . I would like to get as much as possible of the power for these from one or more solar panels, and then top up the...

I'm not sure if this is the right place to post this, so please advise if this needs to be moved. The question deals with 4 mis-matched solar panels on an RV roof. Yes, it is a bad design, but the RV mfg is no longer in business, so there you go. I am somewhat knowledgeable on solar array...

Hi Everyone, My aim is to build a simple solar powered pump with a rechargeable battery to water plants. The idea is to use a 6V 1W Solar Panel connected to a TP4056 (protected) to charge a 18650 Lithium Ion Battery. On the output is an MT3608 2A Boost Converter to step up the voltage to a...

Hello, I am building Solar Guitar™ prototype, an eco-friendly, self-sustained musical instrument solely powered by the Sun: https://patents.google.com/patent/US9905213B2/en 10-15 watt, 2 speaker stereo guitar amplifier with reverb/chorus/delay/overdrive will be installed into the guitar’s body...

Hello great team! I'd immensely appreciate the help of brilliant minds out here. I've Solar rechargeable emergency unit that can power 2 lights and a small table fan. The unit stopped working with a blown resistor on the circuit. I did try replacing the resistor with an identical color coded...

Hi everyone, I plan to build a high capacity 3.7V/5V solar charging powerbank (something like 10-15ah). I’m going to use modules of TP4056 breakout board each coupled with two 18650 cells in parrallel. But I was wondering what would it need to charge two or three of these TP4056 modules with a...