|Feb 19, 2009, 05:14 PM|
12V Power supplies 30A $40 and 46A $60 for your chargers
Let's call these Feather power
Anyway I have 2 kinds of supplies to power your chargers wherever you have access to 120V. They are pulled from file servers and so they provide a well regulated supply suitable for any charger that needs 12VDC. They will not burn up if overloaded but will just shut down. Just disconnect everything and wait about 30 seconds and reconnect.
The first will provide 12V up to 30A. I have used one of these every week at the field for about a year. I can power two Astro 109's and 2 Triton II's.
I have found I can also use one to power my Hyperion Duo and charge two 6S 5000 packs at once at 5A on each pack.
All this supply needs is a PC power cord and for you to solder/clip/etc your charger onto it.
I am selling these for $40 shipped in the CONUS.
The second power supply will do 12V and 46A on 120V and 12V 86A on 240V. I have not tried these on 240V yet but the specs are straight off the nameplate. These supplies have 6 male blades for outputs. 3 are 12V and 3 are ground. The blades are spaced perfectly for clipping charger leads onto. I think these supplies would be great for a club to have at the field all the time.
These supplies require a power cord soldered to some short wires in the supply. Not hard for some of us and I'll post pictures and instructions here. But some may want a plug and play solution so for $10 I'll add a cord.
I'm selling these for $50 shipped CONUS without cord or $60 shipped CONUS with the cord.
You can order here:
The wires soldered to the supplies as shown on the website are not included. PM me if you want any special work.
|Feb 19, 2009, 05:27 PM|
Sure Here's a Triton II sitting on top.
|Feb 24, 2009, 05:27 PM|
I've had several questions about how I connect multiple chargers to one supply so I took some pictures.
Basically they are just in parallel so each charger sees 12V.
Of corse the power supply has to be ale to supply current (Amps) to each charger depending on the charger's needs.
To find out how many amps a charger requires, read the manufacturer's instructions or calculate the number yourself. The supplies have a label on them that says how many Amps they can put out.
The calculation is pretty simple grade school math. A fully charged LiPo is 4.2 Volts. The charge rate is up to you but is usually 1C or 1 times the capacity of the cell. We charge 2100 cells at 2.1 Amps. So for our one cell example that would be 4.2V X 2.1A = 8.8 Watts. Stay with me here.
To see how many Amps 8.8 Watts is at 12 Volts take 8.0 / 12 = 0.67 Amps. Not a lot but this is only one cell.
A 3 cell 2100 pack would take 3 times the Amps at 12 Volts to charge or 2.2 Amps. Still pretty small.
How about a 6 cell 5,000 pack? Well 6 X 4.2 Volts X 5 Amps = 126 Watts or about 10 Amps at 12 Volts.
The only other thing you need to remember is that chargers are not perfect at putting power from the supply into the battery. That means we actually need a little more power for the charger to operate. A good estimate is to multiply the Amp figures above by 1.2 to get close to actual requirements. So for the 6cell example, thet means about 12 Amps at 12 Volts.
So with these supplies you could run a lot of small chargers or 1 or 2 large ones.
|Feb 24, 2009, 10:58 PM|
I bend each wire to form a hook after tinning and then these hooks are joined and squeezed together with pliers to make a good physical connection before soldering. Don't forget to heatshrink everything.
|Mar 02, 2009, 07:16 PM|
Glad you like it. Someone asked if the $60 supply came with the power cord attached or just in the box. In Post 7 and 8 I detail how I add the cord to the supply for an extra $10. So if you buy a supply with the cord it will be installed as in those posts. No way I'd charge $10 to put a cord in the box.
|Mar 03, 2009, 01:28 AM|
Joined Aug 2008
Trader Rating: 1
Are these 2 Power supplies still available? Just ordered
the iCharger 106B+ today. After reading a couple of your
posts,it seems the first charger would work.( 12V up to 30A)
If I'm wrong please let me no before I send payment.That is
if there still available. Thanks in advance.
PS The most I will charge this year will be 1 6S cell.
But I think I will be growing in this sport,so I'm trying to buy
a little bit bigger setup just in case.
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