Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On


Super Savings Item! Save 34% on the Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit at Sarswal Tour & Travels. MPN: ADA2124. Hurry! Limited time offer. Offer valid only while supplies last. If you have a Pro Trinket you probably know it's the perfect little size for a portable project. This LiPoly backpack makes it really easy to do! Instead of wiring 2 or 3 boards together to make a charging system, this little PCB sits on top of the Pro Trinket and allows a LiPoly/LiIon battery to plug in. When the Pro Trinket USB port is powered, the battery is recharged automatically. Unplug the USB port and the Pro Trinket will switch over to the rechargeable battery.Ideally, this backpack is


Images:
Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit (Image #1)
Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit (Image #2)
Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit (Image #3)
Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit (Image #4)
Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit (Image #5)
Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On by Adafruit (Image #6)
4.6 out of 5 stars with 18 reviews
Condition: New
Availability: In Stock
$7.49
$4.95
You Save: 34%


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Product Description & Reviews

If you have a Pro Trinket you probably know it's the perfect little size for a portable project. This LiPoly backpack makes it really easy to do! Instead of wiring 2 or 3 boards together to make a charging system, this little PCB sits on top of the Pro Trinket and allows a LiPoly/LiIon battery to plug in. When the Pro Trinket USB port is powered, the battery is recharged automatically. Unplug the USB port and the Pro Trinket will switch over to the rechargeable battery.Ideally, this backpack is for use with the 3.3V Pro Trinket, so that the battery voltage (3.7V-4.2V) will get regulated down to 3.3V on the Pro Trinket board. However, many times, you can run a 5V Pro Trinket + accessories off of the ~4V from the LiPoly battery with no problem. (Technically its overclocking but we've never seen that affect the Pro Trinket itself, AVRs are happy to overclock without complaint).Solder the backpack on with the extra long header so that it can still plug into a breadboard, or clip the long header leads short afterwards for a slim package. There are two LEDs - one red and one green. While charging, the red LED is lit. When the battery is fully charged and ready for use, the green LED turns on. Seriously, it could not get more easy.If you want to add an On/Off switch, we also made that really easy. The two 0.1" holes with a box around them are the battery output line. Carefully cut the trace between them with a hobby knife and replace with two wires from a switch like this slide switch , or this pushbutton one , for example.Charging is performed in three stages: first a preconditioning charge, then a constant-current fast charge and finally a constant-voltage trickle charge to keep the battery topped-up. The charge current is 100mA by default, so it will work with any size battery and USB port. If you want you can easily change it over to 500mA mode by soldering closed the jumper on the bottom, for when you'll

Features & Highlights

  • Adafruit Part Number: 2124
  • Stock Type: Power >> LiIon & LiPoly >> Accessories
  • In Stock & Ready to Ship

Additional Information

Brand:
Adafruit
Manufacturer:
Adafruit
Category:
Laptop Bags
Color:
Green
Model:
2124
MPN:
ADA2124
UPC:
720189973253
EAN:
0711978442814
Part Number:
ADA2124
Publisher:
Adafruit
Binding:
Personal Computers
Item Size:
3.35 x 0.39 x 4.72 inches
Package Weight:
0.05 pounds
Package Size:
1.61 x 0.31 x 2.6 inches

 


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