ok, so I'll need some higher wattage rated diodes for the 6v test. I'll pick them up tomorrow if i have time. I believe the ones i have are only rated to 1a, and as soon as i connected the 7v battery to the circuit, things started to get toasty.
ok, had battery reversed, lol. Reversed back to correct direction, tested again with 12v and got same results, increased resistance a bit so it was 175ma without, and 30ma with circuit, so 5.8 multiplier (worried about resistors handling extra current, so figured more in parallel would be less likely to die).
so, ended up with 60 idle, 125ma peak. So, 60ma * 5.8 * 6.6v = 2.3w idle, 125ma * 5.8 * 6.6 = 4.785w peak
So, to end up
Circuit P2P negative charging
12v circuit
Idle
0.175A * 13.9v = 2.4w
Peak
0.328A * 13.9V = 4.55w
6v circuit
Idle
0.348A * 6.6V = 2.3w
Peak
0.725A * 6.6 = 4.8w
I'll note that all of these were numbers tested tonight in one run, with the engine going the whole time, so they should be consistent.
So really, much of a muchness within reason... I think id be enclined to go with the 12v simply because of car parts, and ease of getting LED's etc for 12v circuits vs 6v?
ok, had battery reversed, lol. Reversed back to correct direction, tested again with 12v and got same results, increased resistance a bit so it was 175ma without, and 30ma with circuit, so 5.8 multiplier (worried about resistors handling extra current, so figured more in parallel would be less likely to die).
so, ended up with 60 idle, 125ma peak. So, 60ma * 5.8 * 6.6v = 2.3w idle, 125ma * 5.8 * 6.6 = 4.785w peak
So, to end up
Circuit P2P negative charging
12v circuit
Idle
0.175A * 13.9v = 2.4w
Peak
0.328A * 13.9V = 4.55w
6v circuit
Idle
0.348A * 6.6V = 2.3w
Peak
0.725A * 6.6 = 4.8w
I'll note that all of these were numbers tested tonight in one run, with the engine going the whole time, so they should be consistent.
So really, much of a muchness within reason... I think id be enclined to go with the 12v simply because of car parts, and ease of getting LED's etc for 12v circuits vs 6v?
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