hello guys,
its a very good and nice thread for 3-axis cnc.
of course its a long thread of 22 pages (took me 1 whole day to read and understand) but iam able to solve my lot of doubts and questions.
thanks guys (spl. MP,nikolaw and GreekPIC... others too)
i saw lot of questions regarding the...
yes it is available.
and in TO-220 package.
thanks ante.
**if it is so efficient can i place it in a closed box(with small hest sink) for my motorcycle project??
hello all,
i need 5v supply from my vehicle 12v battery.i know i can use 7805 but the problem is my circuit drives 20 LEDs continuously which roughly needs more than 400ma of current(over all).and the area is so conjusted i can't mount a big heat sink.
so can i use dc-dc converter for this...
hi all
i have been working on this project from 2 weeks.it worked nice.
it is really worth making circuit.
there 2 types of circuit.
1.it uses 600:600 center tapped transformer
http://www.grynx.com/projects/build-your-own-chat-cord/1/
2.this uses combination of resistors and capacitors...
cool.
thanks a lot ante.
tomorrow i'll get some resistors of different values.so that i can make it variable.
imean 15ma-c/20
30ma-c/10 for 14Hr
60ma-c/5 for 7Hrs (ofcourse not preferable)
thanks once again.for helping me
u ppl are just really amazing . :-*
as per c/10 for 14Hr rule,current for charging a 300ma battery shld be 30ma. right.
but in previous post u said 82 Ohms resistor will work.where as it shld be 40 Ohms for 30ma
correct me if iam wrong
iam bit confused ???
i think magnetic sensors work efficiently at high speeds compared to IR sensors.
u can uses a pair of magnet and halleffect sensor for calculating RPM.
i dono much abt pic programming.but i came across such RPM counter while searchig for LED POV stuff...
got it.
thanks.
is there any particular formula for this resistor value.
imean in furture if i want to charge packs of 700ma or 800ma etc i need to change resistors too right.
and gyus to charge AA or AAA "single cell" what modification shld be done in lm317 design.
thanks for correcting me.
is current calculation is right(c/10 for 14Hrs)
if yes then the final result will be 7-8v input to LM317 with R1 82Ohms resistor.(as ante said) can charge a 3.6v battery pack safely in 14Hrs
thanks ante.i'll go with lm317 based circuit
i dono much abt these abt these rechargbles.but i think ni-cd shld be chrged at 1.5+pack voltage and c/10 of its current rating it.
if it is true then i need 5.1v @ 30ma for 14Hr .
ohh ok then
i did a small search on net and i found below 2.which one of this is best.
http://agendawiki.com/cgi-bin/aw.pl?ChargingCircuits
this one from our forum only.
and this is from groups-google-
what is ur openion abt these