eggfinder TRS USB power?

[taiwanluthiers]

I'm looking on ebay for 2s batteries but I don't have a charger for it... actually I have no idea how I'd charge it either.

I have one of those USB batteries that are used to extend the battery life of iphones or whatever. I'm wondering if those will power the eggtimer and fire matches?

 

[rc dude]

I don't think that those USB battery packs can supply enough fire current, plus they are bulky and heavy. I would look into just getting a cheap lipo charger, like this: https://www.hobbyking.com/hobbyking/store/__41163__Turnigy_12v_2_3S_Basic_Balance_Charger_US_Warehouse_.html
It won't charge with much current, but usually flight batteries are small, so a 500mah will be charged in about 45 mins.
Good luck,
Kyle

 

[bobkrech]

For LiPo battery packs and chargers goto hobbyking.com They have thousands of options and the best prices around.

https://www.hobbyking.com/hobbyking/store/__86__85__Batteries_Accessories-Li_Poly_All_brands_.html All LiPo batteries.

https://www.hobbyking.com/hobbyking...AC_Charger_Discharger_1_6_Cells_GENUINE_.html is the best battery charger for hobby use. It

It will charge virtually any battery you have either at home or in your car.

Features:
•AC 100~240v or 12V DC input
•Microprocessor controlled
•Delta-peak sensitivity
•Individual cell balancing
•Li-ion, LiPo and LiFe capable
•Ni-Cd and NiMH capable
•Large range of charge currents
•Store function, allows safe storage current
•Time limit function
•Input voltage monitoring. (Protects car batteries at the field)
•Data storage (Store up to 5 packs in memory)
•Battery break in and cycling.

Spec:
Input Voltage: 11~18v
Circuit power: Max Charge: 50W / Max Discharge: 5W
Charge Current Range: 0.1~5.0A
Discharge current range: 0.1~1.0A
Ni-MH/NiCd cells: 1~15
Li-ion/Poly cells: 1~6
Pb battery voltage: 2~20v
Weight: 580g
Dimensions: 133x87x33mm

This charger has a JST-XH charge plug, which makes it compatible with Zippy, HXT, TURNIGY and any pack with a JST adapter.
This is a Genuine iMAX B6AC charger. If you want a cheaper price, purchase the FAKE iMax B6. (search on the left for FY-B6AC)

You can get a cheaper unit but this will do everything you want anywhere, anytime.



Bob

 

[Wayco]

I power all three of my Eggfinders with this:
https://www.hobbyking.com/hobbyking/store/__20388__Turnigy_nano_tech_950mah_2S_25_50C_Lipo_Pack.html

It's a little large, but will keep running for 8 hours, handy if you forget to turn it off while at the launch.

I also purchased this charger:
https://www.hobbyking.com/hobbyking..._6_80W_10A_Balancer_Charger_LiHV_Capable.html

It works well on many of the different LiPo batteries I have and will also charge the lead/acid battery I use for my wireless launch system. It does not come with the JST plug you need to charge the LiPo's:
https://www.hobbyking.com/hobbyking/store/__19435__XT_60_to_JST_Charging_Adapter_2pc_.html

 

[ksaves2]

I power all three of my Eggfinders with this:
https://www.hobbyking.com/hobbyking/store/__20388__Turnigy_nano_tech_950mah_2S_25_50C_Lipo_Pack.html

It's a little large, but will keep running for 8 hours, handy if you forget to turn it off while at the launch.

I also purchased this charger:
https://www.hobbyking.com/hobbyking..._6_80W_10A_Balancer_Charger_LiHV_Capable.html

It works well on many of the different LiPo batteries I have and will also charge the lead/acid battery I use for my wireless launch system. It does not come with the JST plug you need to charge the LiPo's:
https://www.hobbyking.com/hobbyking/store/__19435__XT_60_to_JST_Charging_Adapter_2pc_.html

If one has to add nose weight might as well add something useful like a battery.:wink: If it's a large capacity, can do a wiring harness and use it to power the unit and the pyro circuit as well. I have a 1300mah LiPo pack for that purpose. I use a screw switch on the pyro circuit I access through the static port and manually plug in/secure the battery connector to the harness to power up the computer. I then seal it up into the ebay and ready to go after on the pad and the pyro screw switch is turned on and the TRS activation routine started.

Nice links Fred. I remember when chargers were a relative fortune. Can get some pretty nice ones for an economical price. I remember using a potentiometer, ammeter and a wall wart to charge nicads in the past. No need for that anymore! Kurt

 

[taiwanluthiers]

So this charger, how do I power it, do I just connect it to the USB?

Also make sure you click on USA EAST or USA WEST if you are in the USA, otherwise it ships from some other country and it will not only take forever, you also pay more shipping too!!

 

[conman13]

So this charger, how do I power it, do I just connect it to the USB?

Also make sure you click on USA EAST or USA WEST if you are in the USA, otherwise it ships from some other country and it will not only take forever, you also pay more shipping too!!

I also do RC. I use this just fine. https://www.hobbyking.com/hobbyking...ger_Cell_Checker_30w_2s_4s_US_Warehouse_.html

it comes with battery clips to charge it with a car battery or you can get one of these to plug it into the wall.
https://www.hobbyking.com/hobbyking..._Switching_DC_Power_Supply_US_Warehouse_.html

 

[taiwanluthiers]

Maybe I can just charge it with my computer power supply... it has a 12v output (I have to open up the computer and gut a molex connector to make this work). I'm just getting frustrated at buying more and more stuff just to make ONE freaking rocket fly!!!

 

[JDcluster]

NO!
Cutting corners has it's consequences.

Unless you would like an explosion followed by possible fire.
Lipo batteries WILL explode if not properly charged.
The chargers are needed to charge each cell at the right rate and correct voltage.

Plugging in any old PSU will damage the cells leading to what I just mentioned.

JD

Maybe I can just charge it with my computer power supply... it has a 12v output (I have to open up the computer and gut a molex connector to make this work). I'm just getting frustrated at buying more and more stuff just to make ONE freaking rocket fly!!!

 

[taiwanluthiers]

No what I mean is, I have that charger unit, then hook that unit to a computer PSU to power it. Then the charger to the battery. I will not ever connect a computer power supply directly to a LiPo battery.

That's what I'm asking, is that charger has no way of plugging into the wall.

 

[zanfar]

Maybe I can just charge it with my computer power supply... it has a 12v output (I have to open up the computer and gut a molex connector to make this work). I'm just getting frustrated at buying more and more stuff just to make ONE freaking rocket fly!!!

As a supply for a charger, that should work fine. PSUs have pretty beefy 12V rails. From what I can find the DC-4S needs about 2.5 A on a 12 V supply, so your average wall wart isn't going to cut it.
You sound like you have your head on straight, but just to be sure, I would pull the PSU from the computer if you are using it this way, and take a quick look at the label just to make sure you have a 30W 12V rail.

 

[bobkrech]

So this charger, how do I power it, do I just connect it to the USB?

Also make sure you click on USA EAST or USA WEST if you are in the USA, otherwise it ships from some other country and it will not only take forever, you also pay more shipping too!!

Maybe I can just charge it with my computer power supply... it has a 12v output (I have to open up the computer and gut a molex connector to make this work). I'm just getting frustrated at buying more and more stuff just to make ONE freaking rocket fly!!!

No what I mean is, I have that charger unit, then hook that unit to a computer PSU to power it. Then the charger to the battery. I will not ever connect a computer power supply directly to a LiPo battery.

That's what I'm asking, is that charger has no way of plugging into the wall.

https://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=75598 is the hobbyking link for the US warehouse for this product.

You probably shouldn't use an internal computer power supply to power the charger unless it is disconnected from the computer as it will draw more than 50 watts. You can most likely use any DC output laptop charger as the required input voltage for the DC battery charger calls for 11-18 VDC and most laptop chargers are at least 60 watts......

Bob