Any cheap regulator/resistors to patch a 14v V-mount to 7.2v?

powervideo

powervideo

Well-known member
Just wondering if anyone knows where I can find an inline regulator that could reduce the >15v output of a V-mount battery to the 7.2 (?) voltage of a 7D. I've seen one solution running a XL2 V-mount but that means buying a whole new V-mount plate which costs twice as much as a regular V-mount.

Cheers,
Peter
 
590425.jpg

http://www.bhphotovideo.com/c/product/590425-REG/Canon_3352B001_DR_E6_DC_Coupler.html

655669.jpg

http://www.bhphotovideo.com/c/product/655669-REG/Switronix_XP_DSLR_C_XP_DSLR_C_Power_Tap.html
 
Cool. Can I assume you snip off the dummy batt and replace it with a D-tap connector? That wo9uld be the cheapwer option (than the Swit)
 
you need the dummy battery in the camera for the camera to turn on. then you connect the other side to the switronix regulator. then the regulator to your battery.
 
ooo.... looking a bit messy and expensive now. But I guess it 's better than swapping out batts all day.
 
I built one by tearing apart a cheapo hong kong battery and installing a voltage regulator inside. It can take anything from about a 10v to 35v input and sends 7.2 to the camera. Works brilliant and the big 12v battery acts as a counterweight on the shoulder mount.


Parts list-

Adjustable voltage regulator from radioshack- LM317
Resistors- 100 Ohm, 220 Ohm, 1.2k Ohm

Total cost with an extra (non metering) battery left over was about $25
 
Scratch that. I spoke too soon.
The regulator heats up A LOT and the camera shuts down, losing the clip you were shooting. It must be pulling more than the 1 amp that the regulator is good for.
 
Tim Joy said:
Scratch that. I spoke too soon.
The regulator heats up A LOT and the camera shuts down, losing the clip you were shooting. It must be pulling more than the 1 amp that the regulator is good for.
Click to expand...

Tim, when you try to use a linear regulator like this, excess voltage (anything above 7.2V) which is about 5V-7V in this case, has to go somewhere, which is the regulator. In other words, if your battery is 12V-14V, 7.2V is used to power the camera, while 5V or more heats up the regulator. Effectively, your battery charge is wasted as heat, with only slightly more than 50% of the battery energy going to power the camera. HTH
 
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