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External battery for Bolex EBM (wiring...??)


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#1 ericyeong

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Posted 11 January 2008 - 10:43 AM

Hi, hope you guys could help me to solve this... I'm trying to power up my EBM with external 12V battery instead of the hand grip battery, I salvaged the 7-pin plug from my burnt camera charger and tried to connect it to the 12v battery. When I opened the charger, it was marked -ve & +ve on wires and I connect them as per to battery. It ran but at higher frame rate ( was set on 25 fps)... sound like 50 fps?? I unplugged immediately, my camera still working as normal on the hand grip battery...

Question;
-does the wiring on the connector pin different between charger and power up cable?
-if yes, how is it suppose to be?
-the battery that i tried is Lithium-polymer type, 11.1V 2200mAh 20c, does this battery work on this camera?

Thanks,
Eric

Edited by ericyeong, 11 January 2008 - 10:44 AM.

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#2 Jean-Louis Seguin

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Posted 11 January 2008 - 01:03 PM

Hi, hope you guys could help me to solve this... I'm trying to power up my EBM with external 12V battery instead of the hand grip battery, I salvaged the 7-pin plug from my burnt camera charger and tried to connect it to the 12v battery. When I opened the charger, it was marked -ve & +ve on wires and I connect them as per to battery. It ran but at higher frame rate ( was set on 25 fps)... sound like 50 fps?? I unplugged immediately, my camera still working as normal on the hand grip battery...

Question;
-does the wiring on the connector pin different between charger and power up cable?
-if yes, how is it suppose to be?
-the battery that i tried is Lithium-polymer type, 11.1V 2200mAh 20c, does this battery work on this camera?

Thanks,
Eric



Measure the voltage on the pins of the handgrip to camera plug.
I think it is pins 3 and 4 but I don't have my documentation in front of me to tell you which is pos and which is neg.
Duplicate the connections on your other 7-pin plug.

11.1V may a bit borderline to run the camera. The minimum voltage required is around 11 volts.

Cheers,
Jean-Louis
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#3 Bo Svalin

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Posted 12 January 2008 - 10:26 AM

NEVER NEVER!!! Use the charger directly to the camera, it destroys both the charger and the camera.
I advice you to use Ni-MH cell these leaves 1,2 Volt per cell, 10 off this in serial
will give you 12 Volt, and you have a very competent battery.
Go to http://www.apecity.com/manuals/ here can you download H16 EBM Electric manual .
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