tag:blogger.com,1999:blog-8517901213371477159.post1092585261801873389..comments2024-03-03T14:25:55.028+05:30Comments on Electronics FAQ: Replacing the current sense resistor in Portable Chargers/Power Banks for powering low power DIY projects.Anurag Chughhttp://www.blogger.com/profile/15390575283968794206noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-8517901213371477159.post-42528361601447170642019-03-30T15:54:26.643+05:302019-03-30T15:54:26.643+05:30SMD Resistors < 100 Ohms are marked with R that...SMD Resistors < 100 Ohms are marked with R that stands for the decimal point.<br />R100 as Circuit Designer rightly mentioned, is .100 i.e. 0.1 Ohms. Anonymoushttps://www.blogger.com/profile/14930275832348701221noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-5827103780820071452017-09-14T09:16:27.709+05:302017-09-14T09:16:27.709+05:30I had the same issue, needing to power an arduino ...I had the same issue, needing to power an arduino from a large "smart" power bank that just cut out. Found a far simpler solution - add a cheap little rectangular power bank, one too cheap to have any of this smart electronics, in series. So I plug my arduino into the cheap power bank, then plug the cheap one into the big smart one. The arduino runs happily from the cheap one. The cheap one charges from the big one, and the current draw is high enough for it to work. It's quite inefficient really, running two charging circuits, but I am adding some extra storage which may compensate for that. Much easier than pulling them apart and fixing them. Hope it helps someone.Mr Dennishttps://www.blogger.com/profile/08082162226406043486noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-52985644545468604192017-06-18T16:33:03.420+05:302017-06-18T16:33:03.420+05:30R100 = 0.1 ohms
Look at table on second page here...R100 = 0.1 ohms<br /><br />Look at table on second page here:<br /><br /><a href="http://www.ohmite.com/techdata/ohms-terms.pdf" rel="nofollow">http://www.ohmite.com/techdata/ohms-terms.pdf</a>Anurag Chughhttps://www.blogger.com/profile/15390575283968794206noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-48382183016258218852017-06-18T10:16:13.994+05:302017-06-18T10:16:13.994+05:30R100=10ohms and not 100ohms. ThanksR100=10ohms and not 100ohms. ThanksCircuitry Designerhttps://www.blogger.com/profile/11374255065716789934noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-8905874240082712532017-05-18T16:35:59.695+05:302017-05-18T16:35:59.695+05:30nice postnice postAnonymoushttps://www.blogger.com/profile/00357933460302060158noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-33415970453110722512016-12-20T13:58:47.165+05:302016-12-20T13:58:47.165+05:30You can build a PJRC circuit for external solution...You can build a PJRC circuit for external solutions, this won't void warranty.<br />https://forum.pjrc.com/threads/28624-USB-Battery-Bank-Prevent-Shut-Down<br />https://www.dorkbotpdx.org/blog/paul/battery_pack_load-------- Rgu---------https://www.blogger.com/profile/18406232645817095654noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-54762113424034748602015-12-23T00:04:55.198+05:302015-12-23T00:04:55.198+05:30could this be cause insted by the cable having sli...could this be cause insted by the cable having slipt a tad?mtam7777https://www.blogger.com/profile/05746569189370653292noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-14603754498660859032015-12-23T00:04:09.256+05:302015-12-23T00:04:09.256+05:30could this be cause insted by the cable having sli...could this be cause insted by the cable having slipt a tad?mtam7777https://www.blogger.com/profile/05746569189370653292noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-69622771029782095652015-01-31T21:00:11.161+05:302015-01-31T21:00:11.161+05:30Hello
Thanks for your article. I bought a Tecknet...Hello<br /><br />Thanks for your article. I bought a Tecknet Powerbank 9000mAh and after opened it I found a big R050 resistor near 1A output plug.<br /><br />I replaced it with 6 ohms, 10, 20 and 30 ohms resistors, but nothing works, it still power off.<br /><br />An idea of what I can test ?<br /><br />Thanks<br /><br />GregAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-79620119990974027612014-11-01T10:10:42.707+05:302014-11-01T10:10:42.707+05:30@mohammad, I began with the same idea, but then de...@mohammad, I began with the same idea, but then decided that since my power bank was old anyway and out of warranty, it wouldn't really matter if I hacked it.<br /><br />Say your arduino is drawing only a few milliamperes, you will need to add a load big enough to draw atleast 100mA if you want the power bank to not turn off. Besides that load generating heat, the power bank itself will run out of charge soon - not a good idea if you want long operating times.<br /><br />If you still don't want to hack your power bank, go for the newer power banks which don't have any buttons, and only get turned on and off depending on if something is connected to their USB port or not. They dont really care about home much current is drawn - check out the Minix and Portronics chargers in the photo above. There is an eveready one without the switch too which sells for Rs. 450.<br />Anurag Chughhttps://www.blogger.com/profile/15390575283968794206noreply@blogger.comtag:blogger.com,1999:blog-8517901213371477159.post-17423714331898071882014-10-31T06:50:36.067+05:302014-10-31T06:50:36.067+05:30Hi,
Thanks for this post.
I tried to use the power...Hi,<br />Thanks for this post.<br />I tried to use the power bank to power my Arduino, but it turns off, so I wonder, wouldn't it be easier for me and others who don't wish to open the power bank and lose the warranty to just add another load besides the Arduino to draw more power and stop the power bank from sleeping (turning off).<br />For example, some lights.<br />Or even a rechargeable battery in some configuration so that when the battery is full, it will power the Arduino, and when it needs charging, then it will draw power from the power bank resulting in supplying power to itself and the Arduino as well.<br />This was just a thought, what do think .... ?Anonymoushttps://www.blogger.com/profile/02168128386130471782noreply@blogger.com