510 electrical specs needed

[o4_srt]

Looking for electrical specs for the 510

I'm in the process of designing a switchable passthrough to allow both 3.7v and 5v.

Input to the passthrough will be 5v, need to figure out what resistor to use to drop 5v to 3.7v

In actuality, actual voltage dropped will be less, as I am incorporating an LED in the circuit.

Typical voltage drop of a diode is 700 mV, so figure 4.3v down to 3.7 v.

Voltage drop would be 600 mV.

 

[o4_srt]

Did some playing around with some sim software:

without LED's, using a 1 ohm resistor, and assuming 2.5 ohm atty resistance, I'm getting about 3.57v to the atty, resulting in 7.14 watts.

More experienced modders: does that sound about right?

 

[WillyB]

Input to the passthrough will be 5v, need to figure out what resistor to use to drop 5v to 3.7v

5V on it's own doesn't mean much, you need the proper amount of current (amps) behind it.

If you want to drive a Joye 510 (2.2Ω) at 5V you'll need 2.3A. A typical diode should drop that about .6 -.8V for about 4.3V, which is actually a great place to be. Lot's more watts than stock and decent atty life.

If we use your 2.5Ω @ 5V we get 10 watts.

If we add an ohm, 3.5Ω @ 5V we get 7.14 watts, but 29% of those watts is the resistor.

3.57V is close enough, but the atty is actually accounting for about 5 watts.

You can ignore the LED.