witilt 3 charging and connection problem

Wireless & IoT
1

Hi, I just bought Witilt 3.0 to use it for my final year project.

I really need your help on certain issues.

A) Charging issue

  1. How do I charge Witilt 3.0?

  2. I did not buy the charger but i know that Witilt 3.0 has a built in charger. How do i use that to charge my battery?

  3. What is the maximum current rating that the charger can withstand?

  4. How long should i charge my witilt?

B) Pairing and connection

  1. How do i pair with Witilt 3.0 with my computer?

  2. I use bluesoleil to pair my computer with Witilt, it paired but it could not create a virtual serial port? What is the problem? Is it the bluetooth dongle problem? or the software problem? or Witilt problem?

  3. After connection, how do i bring up the configuration menu?

Please help me…thanks

2

A)

I think they use MCP73843’s for the WiTilt v3.0 and from the charger IC datasheet it says it requires

4.5 - 12V and it will only use as much current as it needs (probably about 1amp) and built in timers will

turn it off when it’s finnished charging…

Relevent Product Summary - [MCP738XX Li-Ion/Li-Polymer Linear Battery Charger IC Family

Datasheet - [MCP73841/2/3/4 Datasheet

(Please don’t blame me, if you set free, the pretty blue smoke… :wink: )

B)

I use bluesoleil to pair my computer with Witilt, it paired but it could not create a virtual serial port?

What is the problem? Is it the bluetooth dongle problem? or the software problem? or Witilt problem?

Most likely a software issue... Have you been able to install the Bluesoleil drivers without problems?

After connection, how do i bring up the configuration menu?

I haven't got a clue... :lol:](http://ww1.microchip.com/downloads/en/DeviceDoc/21823c.pdf)](http://ww1.microchip.com/downloads/en/DeviceDoc/DS21699B.pdf)
3

can i use a usb connector to jst…to charge my witilt? the voltage is 5 V and the maximum current output is 500mA

4

Probably not because the actual maximum current for an unknown USB device is only 100ma, so with a the

WiTilt fast charge current of around 1Amp (most Likely) it may not charge at all… :frowning: (or ten times as slow… :roll: )

5

can i use a wall adapter with 450mA and 4.9 V ? what is the minimum current needed for the charger circuit to work?

6

alan25:
can i use a wall adapter with 450mA and 4.9 V ? what is the minimum current needed for the charger circuit to work?

That would most likely work fine (as long as it's DC), you just won't get to do a fast charge. (for the best, not sure

how many fast charge cycles the Sparkfun Li-ion batteries can handle before they lose noticeable capacity… :wink: )

7

thanks ya…hope if i need ur help again, i will tell you

8

I bought a power adapter with 5 v and 1.5 A rating,will it work?

9

Yup, as long as it outputs DC and is reasonably well regulated. :wink: