Project help wanted .I am new here  and I’m In need of guidance  - Page 1
Forum section: electronics / projects

author: Danielradcliff
author_rank: Contributor
timestamp: February 19, 2021, 01:46:06 am
content: In need of Extra small efficient solar charge controller that can charge 12. 18 650 cellsThis project is what I call a solar birdhouse phone charger it currently works but it’s not very efficient it will charge android phones with the sun but it will not charge iPads or iPhones with the sun. I have built in a power bank into the roof of the birdhouse thing it has 12 battery slots for 18 650 battery cells . The solar panels Wired in parallel can put out 6volt at half an amp in full sun I have a A pair of wires coming outside of the birdhouse From the solar panels Combined output of both solar panels so I can expand in the future I’m thinking about putting an outlet on the side that you can plug a cord into that would lead to in two more solar panels in some sort of stand thing .

author: Halcyon
author_rank: Unknown
timestamp: February 20, 2021, 04:03:15 am
content: Welcome to the forum. Are you sure you want to publish your email address publicly? Don't forget, most of these forums are crawled by Google and other search engines. You also have private messaging functionality through the forum. Completely up to you though.

author: Danielradcliff
author_rank: Contributor
timestamp: February 20, 2021, 08:22:20 pm
content: Thanks for the info I’m not really good when it comes to privacy and security type things thanks for letting me know

author: sam_sam_sam
author_rank: Contributor
timestamp: March 01, 2021, 05:32:03 am
content: The problem you are having is that you have to have a solar panel that is over an amp to charge a iPad or something similarThis is the first problemThe second problem take a battery bank power supply pack and use this type of controller to charge your battery on your tabletThe third problem is that you need a static voltage with no load 6 volts or better but not to high unless you charge the battery bank then charge your tabletI have done this myself and it works for 5 volt @ 1 amp solar panel you use to be able to find them on eBay it been a while sense I have looked for themHere is one of these type that I was referring to abovehttps://www.ebay.com/itm/10Pcs-10W-6V-Mini-Solar-Panel-Cell-Power-Module-Battery-Toys-Charger-Light-DIY/402705977849?hash=item5dc32591f9:g:DsUAAOSw4tNgM2a3Here is another one with higher amperagehttps://www.ebay.com/itm/10X-20W-6V-Mini-Solar-Panel-Cell-Power-Module-Battery-Toy-Charger-Light-J/402643780855?_trkparms=aid%3D1110012%26algo%3DSPLICE.SOIPOST%26ao%3D1%26asc%3D231170%26meid%3D01fed577ba5e487cba90863c60c208df%26pid%3D101196%26rk%3D1%26rkt%3D12%26mehot%3Dpf%26sd%3D402705977849%26itm%3D402643780855%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DPromotedSellersOtherItemsV2WithMLRv3%26brand%3DUnbranded&_trksid=p2047675.c101196.m2219One note you do have to test the voltage and current coming out of your solar panel because not all solar panel can put out the amperage and keep it a 5 volts output so you have to do some testing on different solar panels to find one that will give you the best resultsThe simplest way to do this test is get a wire wound resistor pot 100 to 200 ohm should do an keep lowering the resistance until you have a voltage about 4.95 volts and see what your current output from the solar panel isBut to have a decent charging time you would need to have a least 1 amp or better for best resultsI hope this helps you

author: Danielradcliff
author_rank: Contributor
timestamp: March 02, 2021, 01:38:17 am
content: I do have two solar panels wired in parallel which produces almost an amp . I don’t know what else to sayI plan to put a plug on the side for future expansion as of right now it will charge android phones but it will not charge the iPad via the solar it will charge an android

author: Danielradcliff
author_rank: Contributor
timestamp: March 02, 2021, 01:47:27 am
content: Here’s links to what I used in this project if you have anything that would do you the job better please replyhttps://www.amazon.com/dp/B00HQY56KM/ref=cm_sw_em_r_mt_dp_KS9HFGJ01XZC46XXBMQF?_encoding=UTF8&psc=1https://www.amazon.com/dp/B01HXU1C6U/ref=cm_sw_em_r_mt_dp_THXGX7SFXFPW335X0H22?_encoding=UTF8&psc=1The next link the item says it’s unavailable but you can still see what it washttps://www.amazon.com/dp/B07ZZ8QFCY/ref=cm_sw_em_r_mt_dp_JQ56XYH6EK5HN4S6NCY1?_encoding=UTF8&psc=1

author: sam_sam_sam
author_rank: Contributor
timestamp: March 03, 2021, 01:59:34 am
content: Can you operate the iPad on thisDC-DC Buck Step Down Module 6-24V 12V/24V to 5V 3A USB Charger Module that you postedIf you can charge your iPad is your current to the iPad over 500 milliamperes if not then you might have the issue that I descriptive belowIf not then you need to look at usb pins in the center of the jack do you see any resistors if not then this the reason why it does not want to workI have have seen some usb charging boards that do not have these resistors on the two terminals are shorted together if this is the case then you have look for charging boards that say that will work on Apple devicesOne note do not be tempted to use what called the brand name charging boards that can select the right charging configuration do not trust them I have tried them and they are not reliable devices and you are going to be very disappointed with the resultsLike I said earlier if I were doing this project I would get a decent portable battery pack made for cell phone/tabletsand use your DC-DC Buck Step Down Module 6-24V 12V/24V to 5V 3A USB Charger Module to charge the batteries and use the on board charging board that came with the battery packNow if your panels hook up to the battery pack does the voltage on the solar panels stays below 5.5 volts then you would not need to have the DC-DC Buck Step Down Module 6-24V 12V/24V to 5V 3A USB Charger Module to charge the batteriesYou can buy a decent battery pack for about $20.00

author: Danielradcliff
author_rank: Contributor
timestamp: March 03, 2021, 03:51:04 am
content: Thanks I don’t know what to say right now I’m like that sometimes