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+DIY Hacks and How Tos Hi, what is the max. current output of this circuit given the minimum voltage drop on the input? Even if it's around 100 mA, could it be used for trickle charging of usb devices? For example, my Sony xperia mini phone draws around 500 mA at 5 V when normally charged.
Thanks, I already managed to find this post by A. Spiess http://www.sensorsiot.org/simple-and-cheap-way-to-...where he reverse engineered the circuit. I also managed to buy all these components in my local electronics stores (TL431 is in TO92 package which is probably the same thing), and will solder up these components together and give it a go. Yes, you're right, the first pin of R1 goes to the first pin of R3 and then to the emitter pin of Q1 (that's SS8550). Here's the corrected drawing!
Hi, so in my case I have two 500 F 2.7 V caps and a DC-DC Boost-Buck converter module with 5 A max. output current. I put four 1N4936 diodes in series, pos. to neg. to each capacitor in order to "balance charge" them. If I connect these two in series with also the 12 V (in my case 21 W) car bulb in series and adjust the max. output voltage to 5.4 V, will it work?
Hi, can someone please help me with identification of the component from SC Balance Protection Board as shown in schem. I drew by myself? Since I don't want to wait over a month for this module to arrive in my country, I intend to put components myself. Here is the actual pic and schem. Thx in advance guys!
Hi, nice modification, though I'm not clear about the wattage value of a light dimmer. In my case, I use a 100W glue gun, and will the 250W max. dimmer be enough for this application as well?
Hi, I made this circuit in the form of a USB charger that is powered with a 3S LiPo battery. Instead of 1N5400 diode I used 1N5408 diode (1000V max.), since I could only find it in my local electronics store, and I soldered the output + and - terminals to corresponding female USB socket. When I plug in my mobile phone, after a couple of secs the regulator gets very hot to touch, although phone draws 850mA max. when charging. Could you please help me how should I eliminate an overheating issue? Should I perhaps add ceramic caps in parallel with both input and output sides?