Question on GD400

[Hockeymoose]

Hi guys,

I want to use a SSC P4 with a GD 400. Input voltage will be 4,5V ( 3 AA- alkalies). My question is: Is it possible to build a two-stage mode with a resistor (like using a BadBoy)?

THX,

moose

 

[Mel_PL]

Hi guys,

I want to use a SSC P4 with a GD 400. Input voltage will be 4,5V ( 3 AA- alkalies). My question is: Is it possible to build a two-stage mode with a resistor (like using a BadBoy)?

THX,

moose

I tried to but gave up. The wire and switch resistance must be taken into account as the sense resistors are below 1R.

-- M.

 

[Nereus]

Hi guys,

I want to use a SSC P4 with a GD 400. Input voltage will be 4,5V ( 3 AA- alkalies). My question is: Is it possible to build a two-stage mode with a resistor (like using a BadBoy)?

THX,

moose

Do you mean sense resistor or a "choke" resistor connected in series with the load to limit the input current?

-N

 

[Mel_PL]

Do you mean sense resistor or a "choke" resistor connected in series with the load to limit the input current?

-N

Good idea but mAmps eaten from the battery (i.e. runtime) will be the same in both levels.

-- M.

 

[Hockeymoose]

Originally I planed to put in a two- stage switch with a resistor to lower the input current. But if the runtime could not be enhanced...I have to think of an other solution. How long do you think will the estimated runtime be on my setup?

 

[Nereus]

Originally I planed to put in a two- stage switch with a resistor to lower the input current. But if the runtime could not be enhanced...I have to think of an other solution. How long do you think will the estimated runtime be on my setup?

I have no experience on that kind of mod but I think it should work. :thinking: If you add a resistor to the input side of the GD converter, there will be a voltage drop across the resistor. If the voltage drop is big enough the GD converter will act as if it was a BB converter (step-up converter). And like you said, with BB you can use the input side resistor to limit input current. So why not with GD as well?

I suggest that you try it.

-N

 

[Hockeymoose]

Yes, I will give it a try. Just have to wait a few more days until my GD arrives, I think I can tell you about my experiences in a week or so...
By the way, does anyone has got a wiring diagramm of a GD converterboard?

 

[Nereus]

Yes, I will give it a try. Just have to wait a few more days until my GD arrives, I think I can tell you about my experiences in a week or so...By the way, does anyone has got a wiring diagramm of a GD converterboard?

On Sandwich Shoppe web page they say that you should have a look on BB NG wiring diagram.

-N