Arri 16S 8V power
Posted 05 February 2013 - 11:26 AM
I know a lot of people are buying old Arris then trying to figure out how to power them. I don't know how many people are interested in getting 8V to their Arri 16S or S/B. Most people will want to convert to 12V if you plan to use it a bunch. There are a bunch of professional shops that will do that if you want to. I thought I'd share how I powered mine, if anyone wants to go down the same path.
I modelled a shell in Solidworks, then sent it out to be 3d printed in Nylon from Shapeways. It cost about $10. When it came in, I needed to drill out the holes. Otherwise it was ready to go.
I pulled out my old Quantum batteries. These were intended to power handle flash units. Also old digital cameras. These can be bought fairly cheap on ebay (~$30/ea). But most need to be re-celled. The cells cost about $20/each. This was a good solution, since they run 8V DC in a portable package. Also they are sealed lead acid, so high current draw isn't a big problem. Also, I already had them on hand, as well as a sacrifical cable.
I cut the end off the sacrificial cable. Positive goes to the big pin on the left (9/64"), negative to the smaller pin on the right (7/64").
I had intended to build plug sockets out of 240 Brass tube. But I got impatient, and just ran the wire through, and bent it at the edge. I press fit the shell, with wires, over the pins with a hammer using light taps. It's all in the wrist. They make a good contact. I ran a few feet of film through and everything seems to be working well.
This is a semi-permanent installation. I don't intend to remove the cable, but could if I ever had to.
Posted 06 February 2013 - 05:24 AM
After for the battery pack, I bought on ebay a 8,4V - 5000mah Nimh battery pack, originaly for RC cars or planes. Bought it for 30€ in germany. I've cut the original plug and welded an XLR female pin. For carrying the battery, I put it on a little bolex 8mm camera leather case.
And for the charger, it's a Imax b6, also well knowed in the RC cars/planes world. Like the battery pack, I welded a XLR plug at the end. You can set lots of things on it.
So know my camera run perfectly, fully charged, I have a good autonomy.
Posted 07 February 2013 - 03:59 PM
In a lot of ways, I like your solution better than mine. It probably weighs less and will run a little longer.
Those arri plugs are hard to find these days.