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How to make Lithium charger
Hi Secret so one can do a pot instead 1ohm resistance to increase or decrease current? Thanks
Simple JDM PIC Programmer
Would it be wise for R1 to be a variable resistor to adjust current? Thanks.
i made it and tested it on pic16f84a and it works fine, thanks elab
quicker cheaper way to make lithium charger--take apart a camera lithium charger or old cell phone and add red and black wired clips.Bingo--charges any single/double series 3.7 batteries. These units are easily found at Goodwill ect or old Canon cameras. For those looking to build lead acid charger--here is old timers easy build unit that charges and di-sulfates them.called: Capacitor charger. Check it out on You tube. It just might work out on Lithium if you down scale the input voltage but needs a timer.
this work for pic 16c625?
NiCd - NiMH PC Based Smart Charger - Discharger
Some USB serial converters are for the RS232 protocol , thus they are have the txd and RxD functions ( pin 2 and 3) , look for a converssor that can perform communication with flow control hardware.
you tried it with some kind of adapter or directly to the serial port
you tested directly connected to the com port on your PC without any type of adapter usb
It worked very well for PIC16F84A with WinPIC programmer
You bought the wrong type of connector from Amazon - you have to remove it. The female and male versions don't have the same pinout because one is the mirrored version of the other. so you;ve connected pin1 to pin5, pin5 to pin1 etc. etc.Alternatively to using the null-modem cable you can solder not a connector but coloured wires to the programmer board and then solder a female connector (making sure pin numbers match correctly) on the other end of those wires. Then you would plug the female connector directly into the COM port of your PC. Don't make the wires too long though. This works - I tested it.
Programmer still is not working I tried using a null modem cable and still have no luck please help thanks...
sir iam programmed comparator program in 16f628a micro controller.after some time the processor getting out of from that.how to avoid sir - ravichandra14556
Can I just you a m/f null connector? Instead of replacing my female sub connector? - The PlaidG
Looks from your photo like you are using a female DB9 Sub connector. The picture above posted by the author shows that he used a male version of the connector (which should be used with a null-modem cable). - Bob_ee
This is the one that I used: http://www.amazon.com/SUNKEE-Serial-Connector-RS-232-Adapter/dp/B00AYCTZFU. So are you saying I need to switch it with a Male sub connector and then use a null-modem cable to connect it? - The PlaidG
The programmar is not working I followed the schematic exactly but the Program doesn't detect the pic
I finally made it. Still have to test it out though
Can I drill the holes now?Or do I need to do something else?
Hi, I don't have this circuit board anymore butI believe I followed this diagram:by http://www.instructables.com/id/How-to-make-the-wo...
Hi,So I'm building a single-cell charger for a 750mAh battery. What are the equations governing the selection of R1? I'm using a PN2222A transistor. I have the circuit set to output a 4.1 load voltage at the moment. I'm just trying to figure out how to limit the current to 750 mA.
R2 and R3??? What are their value ohms or kilo ohms..
I'm not getting any current draw when adding the battery in. Any ideas?
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