I know you want to finish this project sooner than yesterday, but it might pay you to get a copy of the Parts Express catalog. They have just the automotive connection devices you're looking for on pages 320-22 of their current catalog. There's a distribution block, heavy duty lugs, and battery...
That leads to one last question: If there is a switchmode regulator feeding the output of the mobile pack, how much current is it capable of? The OP needs about 5A of current (at 5 Volts), and that could damage the regulator in the mobile pack or cause it to shut down if it's not rated for that...
I stand corrected. My understanding of USB charging was incomplete. Thank's to milesyoung for clarifying this.
Now I can understand how this would work if the charge circuity were in the phone and the battery pack simply acts as a 5V source. I would question though, that if the battery in a USB...
The device the OP described is sometimes called a "mobile battery pack". Rather than substituting for the depleted battery in a cell phone or device it's being used with, it connects, and fast charges the battery in that device, using a micro USB connector which is the standard for charging many...
I fully understand USB specifications, but the OP was talking about using a USB quick charger battery pack, which is a different case. One approach used in chargers is to employ a higher voltage source, and current limit it to the charge current value (50 mA or whatever). This could potentially...
The problem with your original UPS is its battery. Most UPS devices use a lead-acid battery and a lot of them undersize the battery, meaning that it undergoes a significant discharge at high current each time it's called upon to do its job. That current can be significantly higher than what the...
Now I understand what you're after. You either need a 5V battery equivalent delivering about 5A, the output of which is converted to 12V, or you need a 12V battery capable of 2A.
I don't think you'll find a USB charger suitable since it isn't going to source 5 Volts. If it did, no current would...
I'm not that familiar with the LVTTL topology, but I think the same solution would apply. There really aren't any formulas - just experience with the behavior of sensitive inputs. It certainly won't cause any damage to apply the pull-down resistors to the sense lines so I would try that as a...
If your membrane pad is the same as some I'm familiar with, when a button is pressed, it simply completes the circuit between a single X and a single Y line to signal which button is being pressed. With that, I assume you're interfacing by driving one X (or Y) line high at a time (scanning...
The battery packs you're talking about are intended to charge a device, so to push that current into the charging device, the voltage could well be above the 5V that you desire (not sure what your goal is since USB chargers are intended to charge 5V batteries, but you also mentioned 12V).
You...
A lot of cars have a "fusible link" located very near the battery which acts as a main fuse for the entire electrical system. It's kind of intended as a last resort if fusing elsewhere fails to protect, or a main feeder rubs its insulation through and shorts to the frame of the vehicle. Even...
The last post from montoyas7940 and his suggestion would serve you best. Since your router draws such a small amount of power, just get a small UPS and plug the router supply into it. This way, you don't have to worry about the router needing AC or DC, and voltage concerns. A UPS rated at 200VA...
The original statement is a lot like saying "Fords get better gas mileage than Chevys", without any other information provided. You can't make this type of comparison without talking about the type of circuit (the application), the type of BJT & FETs involved, and possibly several other things...
All good suggestions so far. Just note, you're fusing to protect the wiring - not the attached devices. If you wire with #12 wire and come off a single point (star feed), all you have do is use one fuse to that point and size it for #12 wire. If anyone load draws more than the fuse rating, that...