[tangent]

Quote:

R4/R5 to V- is 3.9V now

Then something is desperately wrong. With 32V across that divider, you should only be able to get 2V or so. Perhaps the resistor values are wrong. Try measuring voltage across the divider, and then from V- to the middle of the divider again. Divide one into the other; you should get 0.064, approximately.

 

[intlplby]

lol.... this is why i hate banded resistors..... i had an 82k resistor instead of a 8.2k resistor.... i don't know how many times i stared at it and didn't notice.....

after having my last 3 math classes being entirely with letters i am so not used to doing math with actual numbers.....

doh!

looks like it is trickle charge faster now.... .001V per second or so.

it now reads. .220V at R4/R5

 

[tangent]

Quote:

it now reads. .220V at R4/R5

Give me the number across the whole divider as well, please.

 

[intlplby]

the number across the divider is .3v if i measure from the R4/R5 intersection to the other side of R5 but it is 4.3V if i measure to the other side of R4


it is .3 from the R4/R5 intersection to V- as well

the LED is still not lighting and i no it works and is oriented correctly (long leg in the square pad hole)

 

[tangent]

Quote:

the number across the divider is .3v if i measure from the R4/R5 intersection to the other side of R5 but it is 4.3V if i measure to the other side of R4

"across the whole divider" means from B+ to V-.

If I interpret your numbers right, you would be seeing 4.6V. Since that times 0.064 is indeed 0.3V, it would seem that your divider is now configured correctly.

4.6V is very very low for 18 cells. Either the battery is severely depressed, or something else is not working correctly. Leave it on trickle charge for several hours and see if the R4/R5 node voltage rises to the 1V+ level.

 

[intlplby]

it works... i made some real stupid mistakes trying rush job the battery pack.....

mixed up V+ and V- (that's what happens when you run out of one color hookup wire and use another)

and i goofed earlier on identifying the resistors and finally i picked an R1 value which was too low