McC2S, how much current?

[abuhannibal]

Will the McC2S handle enough current to be used with a direct-drive P7 or MC-E? I am thinking of using one with my new Milkyspit roomsweeper (Leef C-C 2x18500 body, Milky-modded C2 head with an MC-E.)

The plan would be to only hit the max output for a few seconds at a time, say half a minute at most.


Thanks!

-- Bob

 

[Ms_SS]

Please ask on the McGizmo forum since Don designed and knows this stuff.
Then please post your answer here so we all know.

 

[TranquillityBase]

Please ask on the McGizmo forum since Don designed and knows this stuff.
Then please post your answer here so we all know.

Wouldn't Wayne be qualified to answer the question?

 

[dat2zip]

Wouldn't Wayne be qualified to answer the question?

No, I don't have an answer on this. It varies from unit to unit so there is no answer.

Wayne

 

[Chrontius]

Can you give even a rough estimate for the McE2s and the McC2s?

I'd be more worried about the surface-mount resistor eating itself on low beam, honestly.

 

[dat2zip]

The resistors used are 1206 and in most cases we use two resistors to get the desired resistance. Each resistor has 1/2 the total power loss across the switch. A standard 1206 resistor is rated for 0.25W. Together two resistors is ~0.5W.

Industry standard practice is to derate resistors by 1/2 of the specified wattage. This puts the two resistors at a safe 0.25W.

Power across the two resistors if you know the current is:

Current^2 * Resistance = Watts.

A 60 ohm switch uses two 120 resistors. (use 60 ohms in the equation).

Working backwards re-arranging the formula we compute the max current as:

0.25W / 60 ohms = max_current^2 = 64mA

For other resistor values you will have to plug them into the equations to determine the max current.

Wayne