I was hoping someone would mention this part, i dont fully understand why this is, but i konw it's important .. " Isolated " .. vs " not isolated " ..torqueon wrote:I have had good result using Del 3r160 supplies for the old dell optiplex compact desk tops. Been using them for about a year, 4 series to charge a 36 volt pack.
seems they may work well 9 in series for 100 volts.
You must cut the ground on all except for one, and all must be powered up at the same timeI wanted to post some pic and drawings for you, however can,t seem to make it happen! right now. I have posted much detail about the P S U in the past here.
Ask if your are interested, and ill post more info later
Some of the more fancy laptop supplies (Dell) have a high-ohmic resistor between the inputtorqueon wrote: You must cut the ground on all except for one, and all must be powered up at the same time
Reason i'm using these in series with a meanwell is that the laptop supplies will max out at 3.5 amps and keep the meanwell from overloading and melting down. ..cwah wrote:why do we need current constant for charging?
I used a tuck tape ( the red stuff used on home vapor wrap, very strong red tape ..dnmun wrote:what did you use to seal the hole from the needle? did they puff up again after that or stay flat?
I just checked this, and Yes, if i check Ohms from the AC ground to output Negative, i get 3.6k so these are NOT isolated...? right?dnmun wrote:with the SMPS chargers the output is isolated from the input.
if the cord has a grounded lug on it, then you can check to see if the ground is connected to the negative ouput with an ohmmeter. i have seen this case with a three pronged plug charger.
if it is a two pronged plug, the output is isolated.