![]() ![]() Is the 4.9 volts too low for apple products?Īre the Transistors supposed to put out and actual 5 volts or is 4. I am happy that my phone charges from the USB ports but sort of bummed that the Iphone will not. If I plug a premade 12 volt to USB into one of my new 12 volt outlets the Iphone will charge, the output voltage on that USB outlet is 5.1 volts. The output power on the USB ports is 4.9 volts. If I try to charge and Iphone it will not charge, it does not recognize it is connected to a power source. ![]() When I plug in my Samsung Note 3 phone to charge using any of the USB ports it charges fine. Have the capacitor going from the 0 volt to the +5 volt coming out of the Transistor. I had the correct resistors on hand for the LED's, for the 12 volt outlet LED's 470 Ohms, for the 5 volt LED's 82 Ohms, for each LED. I bought the components that I did not have on hand from Digi-Key, (2) LT1084CT-5#PBF-ND transistors, (2) P5139-ND capacitors, and (4) C4SMF-BJS-CROU452-ND LED's. Each individual circuit has an LED after the fuse so I know if the fuse blows. Each 12 volt outlet is fused and the USB outlets are fused as 2 pair, so I have 4 fuses total. What I made has 2 12 volt sockets and a 4 slot USB outlet bank off of a CPU board. I built this circuit for my truck, it only has 1, 12 volt outlet. 12V USB Outlet, Dual Quick Charge 3.0 and PD Type-C (USB C), Waterproof Power Socket Adapter Car Charger for RV, Marine, Motorcycle, Truck, Golf Cart (2 pcs) 35.62 35. They are nice because of their screw terminals. Of course, you can also use an existing 12v-5v converter in your car, be it light duty, medium, or heavy duty or use these nice power adaptor that are meant to be integrated into other projects or this beefier waterproof, super high power alternative with a heatsink. Also, if you really want to protect your circuit badly, just put one on both sides. So, if you want 1.5 amps for your USB ports, then you select a 0.6amp fuse, if you want 2.5 amps at 5v, you select a 1 amp fuse, if you want 3.75 amps, you select a 1.5 amp fuse, etc.). Because we put the fuse on the 12v side, (which can vary from 11.5-12.5 volts, we have to use a value 2.5x smaller than what we want on our USB side. More information on the fuse: you can use a higher rated one if you use a different transistor that can take higher amperage. If you have a strange LED or want to make it brighter, please use this resistor calculator. Any LED will do, here are the values for the most common LEDs : 1.2v = 220ohm, 1.6v = 180ohm, 2v = 180 ohm, 2.2v = 150ohm. if you choose to add an LED, you need an LED and an appropriate resistor for 5V.Header boardsare a great and easy way to do this. For higher amps (many devices at once), use a TO220 ( and a bigger fuse) a L7805CV voltage regulator for lower amps.2 different colors of wire (so that you don't get confused later on).We checked the fast-charging capabilities of each adaptor using a Samsung S10e smartphone, with a 3100mAh battery starting at around 50 per cent charge. It’s often good to have a choice of USB and USB-C to cover all bases. Having twin sockets comes in handy if you regularly charge two products, but make sure you buy an adaptor with outlets to suit your requirements. Between 7.5W and 10W is typical, but many more recent devices can be charged at a higher wattage, which is where USB-C comes into its own and why many adaptors have an increased rating. You should check the phone’s wattage capabilities. Depending on your device, you may need an adaptor plug and cable, which should be added to the cost unless they’re supplied. ![]() Most chargers boost the standard 5V CLA output to 9V, using the original USB sockets or the latest symmetrical USB-C connection. And of course, it can also be used to charge a tablet, sat-nav, MP3 player, handheld game console or other devices. Many of the latest smartphones have fast-charge capability, but you’ll need a suitable USB adaptor to take advantage of this great feature in-car. Charging your phone while you drive is sensible, especially if you use it for work.
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