Single resistor or two in parallel.

[Jgmathis]

I saw a few okl2 setups and one used a sigle 20k ohm axial resistor and the other used two 10amp resetable fuses in parallel. I was hoping to understand the difference and how each effects the most

 

[Robert Cromwell]

The resistor is in the firing circuit and carries no real current. The 10 amp resettable fuses are for overcurrent protection out of the mod or batteries. The 2 components provide totally different functions and are not interchangeable.

 

[Jgmathis]

Thanks for the reply. I see yhat now.Have any suggestions as to why one mod your use 2 fuses and the other wouldnt?

 

[Robert Cromwell]

Thanks for the reply. I see yhat now.Have any suggestions as to why one mod your use 2 fuses and the other wouldnt?

Most mods have no fuses at all. Fuses are a good safety device.

 

[dc99]

The fuses can also be for reverse polarity protection.

 

[Robert Cromwell]

True. But a low forward drop diode works better. No sparks no replacement. Will drop your voltage by .4 but in a regulated mod that is not an issue.

 

[K3nn0Q]

And a pFET is even better since there's even less Vdrop, and an LED can light to tell your batteries are backwards

 

[Robert Cromwell]

And a pFET is even better since there's even less Vdrop, and an LED can light to tell your batteries are backwards

Less than .4 fwd voltage?
http://www.amazon.com/Schottky-Diodes-Rectifiers-Amp-Volt/dp/B00HKSD7CS

Have not played with pFets yet.

 

[K3nn0Q]

The SUP70P03 that's typically recommended has an RDS(on) spec of 0.007 Ohms @8V
Which at 20A would equate to about 0.14V of drop - and that's pretty much worst case
http://www.vishay.com/docs/71109/supsub75.pdf

 

[Robert Cromwell]

The SUP70P03 that's typically recommended has an RDS(on) spec of 0.007 Ohms @8V
Which at 20A would equate to about 0.14V of drop - and that's pretty much worst case
http://www.vishay.com/docs/71109/supsub75.pdf

COOL! Thanks.