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Forum: Pentax Q
11-27-2019, 06:44 PM
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As I mentioned earlier, the USB leads to inefficiency so just link the cell directly Is fine. This guy’s 3D printed contraption is pretty much what I wanted to do. He is amazing. He put a compartment in the right hand grip to hold an IR remote with a trigger. The left handle cylinder to hold a very generous 3000mAh power cell. Twitter |
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Forum: Pentax Q
11-26-2019, 12:45 AM
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No more developments needed, because of this...
TwitterLink
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Forum: Pentax Q
11-06-2018, 01:59 AM
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It’s just a power bank so I can already hook it up to a USB wall wart if I wanted, but the battery life is already very very long.
I wish I had some skill in 3D printing to make a mini DSLR looking vertical grip battery case to fit all this stuff in. Make it ergonomic.
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Forum: Pentax Q
06-24-2018, 03:40 AM
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Forum: Pentax Q
05-08-2018, 09:42 PM
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My dummy battery box came pretty much empty. No components to speak of besides the board with contacts that had 2 wires soldered to it.
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Forum: Pentax Q
05-05-2018, 05:40 PM
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Come back later to update us on how the Q holds up with having 5v input. I was worried that 5v was a bit too high a voltage but may ultimately have been unwarranted concern.
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Forum: Pentax Q
04-20-2018, 04:21 AM
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Just a note to say I now run a line that feeds from a pair of parallel wired 18650 lithium cells directly into the dummy battery. The output measures 4.1ish volts and it works a treat for Q, Q10 and QS1. No more charging circuit inefficiency.
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Forum: Pentax Q
04-02-2018, 05:25 PM
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Forum: Pentax Q
03-08-2018, 05:59 PM
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Yes and some plugins sites indicate Lightroom can shoot tethered with a Q? (Not tried it myself)
What I have tried is this time a double cell powerbank for additional room to work-in a tripod bolt fitting. Cut a small gap in the corner of the case corner to feed a short dedicated wire to power the dummy battery.
Not sure I like it any better as a powerbank bolted to the underside of the Q vs than having only the Q in hand a with long wire to feed from any sized powerbank to suit the occasion.
I have to stress test how long I can shoot timelapse images before hitting any overheating issues in the Q itself.
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Forum: Pentax Q
03-05-2018, 04:37 AM
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Concerned regarding damage from feeding the biggish 5v out of the powerbank directly into the Q as it seemed excessive beyond the 3.7v printed on the Q's battery label.
So my approach was to add a little 3.7v battery charging circuit that takes in a 5v input. Fits nicely into the otherwise empty dummy battery case. Turns out these charging cuircuits do not output at 3.7v but measures around 4.1v. However I settled for this being safe upon my further discovering 4.1v is very similar to what I see coming off a freshly fully charged Q battery.
Superficial tests indicates it works! Though I expect not very efficiently: inside the USB powerbank itself is a 3.7v 2200mAh 18650 lithium cell that feeds another circuit ramping its output up to 5v. That then feeds into my dummy battery charging circuit that drops the 5v back down to 4.1v...
I am seriously considering just wiring the Powerbank's 3.7v cell output (again around 4.1v fully charged) to the contacts of the dummy battery. What could go wrong!
Any input would be much appreciated.
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Forum: Pentax Q
03-04-2018, 07:15 PM
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Used an off brand dummy battery as a base. Already has a wire coming out of it.
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Forum: Pentax Q
03-02-2018, 11:36 PM
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Anyone else running their Q off a standard USB powerbank? I hope later to mount this with a tripod thread to bolt it under the camera. Make it a singe contiguous handholdable unit and so away with dangly wires. Kind of like a battery grip. If I were inclined, even go whole hog, canibalse an IR remote as a shutter button to have it working as a vertical battery grip.
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