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Adafruit WiFi Kit + Battery + Led INFO
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Adafruit WiFi Kit + Battery + Led INFO

by gianjohn on Mon Jul 29, 2019 11:13 pm

Hi, I am trying to build couple of big remote Joysticks (30cm x 16cm x 9cm) for Raspberry pi and I've seen some Adafruit parts that would be perfect for me.
Before I buy the wrong products may I ask your help please?

1) I need to buy your WiFi kit (Bluefruit EZ-Key + Adafruit Micro-Lipo Charger + 500 mAh Battery) but I need a 2500 mAh minimum and preferably rechargeable batteries like the ones showed in there https://learn.adafruit.com/assets/18328.
Is it possible to connect a 2500 mAh battery to the Adafuit Micro-Lipo and the EZ-Key?
And how could I solder it to my interface circuits (it's a new single EG Starts)?

2) I'd like to put also something like a 3 or 4 mini LED system to show the battery status.
What solution should I choose?
And how could I solder it to the circuits?

3) Last question is should I recharge the battery by USB or by an external power supply?
And how could I solder it to the circuits?

Thank you in advance for your kindness and curtesy!
All the best.

gianjohn
 
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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Tue Jul 30, 2019 2:19 pm

The EZ-Key is no longer in production, and didn’t use Wifi. It was a Bluetooth device.

We have devices that do Wifi.. the ESP8266 is specifically designed for Wifi projects.. but you’ll need to confirm that the device you’re connecting to can accept joystick input through a Wifi interface.

Once you nail down the connection protocol, you can move on to other details.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by gianjohn on Fri Aug 02, 2019 12:27 am

Thank you Mike.
I Understand.
What kind of battery does it use?
I am building a Joystick with an EG Starts interface (the new one for 1 player).
I really don't know but I hope that because I'd like to buy your products.
They're amazing.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Fri Aug 02, 2019 1:34 am

The ESP8266 can run from several different power sources, but we have a Feather that runs from a LiPo:

https://www.adafruit.com/product/2821

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Re: Adafruit WiFi Kit + Battery + Led INFO

by gianjohn on Fri Aug 02, 2019 9:32 pm

Thanks!
I am seeing there are several LiPo to choose from the Feather HUZZAH page but the maximum mAh is the LiPo 3.7v 350mAh.
It would be possible to add your LiPo 2500 mAh?
https://www.adafruit.com/product/328
And what circuit for charge the LiPo should I buy from your store?
I've seen the Micro LiPo Charger but I don't know if it would be possible to connect all together.
https://www.adafruit.com/product/1904
Sorry for being so boring but I wish to get the best Adafruit choice to build my Joystick.
Thanks.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Sat Aug 03, 2019 1:25 pm

Any LiPo we carry will work with the Feather.. up to and including the 6600mAh 3P pack:

https://www.adafruit.com/product/353

You have to choose the LiPo you want based on the amount of power the Feather uses, the amount of battery life you want, and any size constraints you want on the final assembly. The ESP8266 uses about 80mA, so a 350mAh LiPo would last a bit more than 4 hours before needing to be recharged. The 6600mAh battery would last around 80 hours, but would be bigger and heavier.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by murdythefrog on Sun Aug 04, 2019 11:40 am

Hey Mike, I also have a feather (sd adalogger though) and have been using 6600mAh's on my project using a little over 500 LEDs (pretty much the max)
Until I recently tried charging up both of my 6600mAh batteries on the micro-LiPo charger(on 500mA mode), they ran both 255 LED boards completely. Now both of the 6600mAh batteries I have are shorting out when the load is high. I have a 2200mAh as well that I haven't put on the chargers yet that can still run all my programs on all 510 LEDs on max load.

Did the micro-LiPo charger kill cells in my battery? I see on the info for the microlipo that it says for single batteries only. Does this mean non-parallel, because I'm not sure why it would start shorting out now.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Sun Aug 04, 2019 1:39 pm

‘Single batteries’ refers to the number in series, or ‘1S’ LiPos, to use the jargon. 7.4V LiPos are 2S packs, 11.1V batteries are 3S packs, and so on. Our chargers only work with 1S packs whose full-charge voltage is 4.2V.

The 6600mAh pack has three cells in parallel, so it’s called a 3P pack.. or 1S,3P to be complete.

The Micro-LiPo Charger works with the 6600mAh pack, but will take several hours to charge the pack fully.

What exact symptoms are associated with the term ‘shorting out’? In my vocabulary, that term is equivalent to ‘catching fire’ when applied to LiPos.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by murdythefrog on Sun Aug 04, 2019 2:47 pm

I think it could be triggered from the overcurrenting possibly. I didn't realize the program would cut off if the load was too high on the battery. The static reading on the batteries was around 3.9v to 4.1v, and the 2200 was at 3.6v

I'm guessing I hit a problem from the animations running at 60fps on the 510 LED chain. When the batteries aren't as full they're able to handle more of a load?
https://learn.adafruit.com/lightship-le ... -over-wifi

My mistake, was confused from them working before then cutting out after getting fully charged. I guess all I have to do is drop the fps to 30?

EDIT: nevermind, they were already running at 30 fps. Not sure what to do now haha

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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Sun Aug 04, 2019 10:25 pm

The LiPos have a built-in protection circuit that cuts off the output if the current load rises too high. For the 6600mAh LiPo, the limit is around 3.3A.

It's possible that your animation has enough LED lit at the same time to exceed that limit. 510 LEDs can draw a maximum current of 10.2A, and 510 NeoPixels have a worst-case current load three times as high.

The solution there is to add another power supply, or to use a power supply with a higher current rating for the whole project.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by murdythefrog on Mon Aug 05, 2019 12:36 am

thanks, also turns out if i lowered the overall brightness being output it can lower that current too, sorry my problem wasn't relevant to this thread I just thought it had something to do with the microlipo and the large battery at first

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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Mon Aug 05, 2019 12:08 pm

No worries.. microcontroller-related issues were on the list of things to rule out. Glad to hear you got things working.

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Re: Adafruit WiFi Kit + Battery + Led INFO

by gianjohn on Sat Aug 10, 2019 10:57 pm

Thank you guys for your courtesy.
So please would you be so kind to write what parts should I buy for my project:

- WiFi interface
- LiPo battery
- info about how to charge the battery (by USB or by power supply)
- Info about the possibility to bring a led as battery status indicator on the outside of the joystick case
- info about how to solder all together

By the way I've an illuminated coin-pushbutton with a 14v mini lamp.
It would be possible to use that as indicator or 14v are too much and I better use a normal led?

Thank you guys!

gianjohn
 
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Re: Adafruit WiFi Kit + Battery + Led INFO

by adafruit_support_mike on Sun Aug 11, 2019 12:33 pm

The ESP8266 Feather has Wifi and a built-in LiPo charger:

https://www.adafruit.com/product/2821

Any LiPo in the shop will work with it, but battery life will depend on the size of the cell. The ESP8266 uses about 80mA, so you can expect a little more than an hour of life per 100mAh of storage capacity:

https://www.adafruit.com/category/574

The ESP8266 only has a few GPIO pins, and can only measure one analog voltage between 0V and 1V, so depending on the number and kind of inputs you want, you might need an external device to read the signals. The Seesaw breakout was designed to be a helper for ESP8266 projects, and only uses two of the ESP8266’s pins:

https://www.adafruit.com/product/3657

For information on soldering, Bill wrote a good tutorial over in the Learning System:

https://learn.adafruit.com/adafruit-gui ... -soldering

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Please be positive and constructive with your questions and comments.