homemade box mod

[robertgoldring]

Evolv's micro USB charging module lets you add the functionality of onboard charging to your DNA 12 and DNA20D, DNA30D, DNA40 projects or can be used as a standalone charger for non-DNA projects.

It is designed for charging 3.7V 1S Li-Ion and Li-Poly cells. An onboard status LED illuminates red when charging, green when fully charged, and orange when no battery is present. Mounting holes for #2 screws are provided for easy attachment.
• Input Voltage: 4.5-5.5VDC
• Charge Current: 500mA
• Charge Voltage: 4.2V
• Input Interface: Micro-USB

• Dimensions: 0.5" x 0.6" x 0.14"


• Mounting: #2 screws 0.30" apart on center


• Purpose: charger for 3.7V 1S Li-Ion & Li-Poly Cells

 

[the mutt]

A lipo built would be good, I have several spare lipos sat and as they are 7.4v they will last for a week between charges

 

[robertgoldring]

Cool. These are just thoughts at the minute. I can't start buying for a week or so

 

[robertgoldring]

I'm getting into this idea loads. I'm so eager it's unbelievable.
Right so, raptor 120w. From a quick squizz on the tweb, most folk seem to use a standard voltmeter/lcd jobby, is there a reason behind this?
Also lipos, 7.4v but what mah should I be looking for?
What size box should I look for, I want a bit of spare space inside cos I've got an idea I wanna try, (asthetically only),


Thanx

 

[the mutt]

The larger the meh the longer it will last between charges and more power you can squeeze out of it over a longer period,

You also need to consider the discharge rating (C rating) as this may have an effect although the chip will probably regulate that.

Lipos are pretty small for the power so won't take much space (component shop give the dimensions for each battery) but I would advice taking extra care and they do require a balance charger so not sure how that would work with the pass thru charging option etc.

 

[robertgoldring]

The larger the meh the longer it will last between charges and more power you can squeeze out of it over a longer period,

You also need to consider the discharge rating (C rating) as this may have an effect although the chip will probably regulate that.

Lipos are pretty small for the power so won't take much space (component shop give the dimensions for each battery) but I would advice taking extra care and they do require a balance charger so not sure how that would work with the pass thru charging option etc.

I did think about the charger aspect of it, so do most people simply just remove their batteries and charge separately?
What kind of mah would be classed as decent, I need really to balance size and mah , I've seen all from 650 ish ip to over 4000,
Would 25c suffice?

Thanx

 

[the mutt]

To be honest my experience of lipos is limited to use with Airsoft guns (moving gears and pistons to produce air to fire BB) so in a box mod I am not sure,

I would say that the massive MEH levels will mean you (in theory) can crank the power up and still get a decent life out of a charge.

I would seriously do some research on lipos before venturing into working with them and check what the chip etc will handle input wise, last thing you want is to spend out cash and time to end up frying it all when you plug in a lipo.

I am sure there are people who have built mods with them (I know one of the guys at my local vender has but haven't picked his brain about it) so there will be some info out there

 

[robertgoldring]

To be honest my experience of lipos is limited to use with Airsoft guns (moving gears and pistons to produce air to fire BB) so in a box mod I am not sure,

I would say that the massive MEH levels will mean you (in theory) can crank the power up and still get a decent life out of a charge.

I would seriously do some research on lipos before venturing into working with them and check what the chip etc will handle input wise, last thing you want is to spend out cash and time to end up frying it all when you plug in a lipo.

I am sure there are people who have built mods with them (I know one of the guys at my local vender has but haven't picked his brain about it) so there will be some info out there

Haha. Some of the lipos I was looking at were airsoft batteries,

Yeah ill have to do some more research, thankyou

 

[the mutt]

I will be keeping my eye on your progress and hopefully see how it goes if you go down the lipo build route.

I had heard that the one done locally only needs charged once a week so can imagine it is a big capacity battery.

 

[BaDaBooM]

You can stick 2x26650's in a hammond 1590b + a raptor and efest do a 50amp 26650 4100mah battery. 2c lipo's need a special charger and are not practical.