Power Management IC Development Tools Adafruit Pro Trinket

Power Management IC Development Tools Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On (1 piece)
- Comes assembled and tested
- Uses the 5V input via Micro-B USB connector on the Pro Trinket
- For charging single Lithium Ion/Lithium Polymer 3.7/4.2v batteries (not for older 3.6/4.1v cells)
- 100mA charge current, adjustable to 500mA by soldering a jumper closed
- Batteries and Pro Trinket not included.
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 only be charging batteries with 500mAh size or larger.
Country USA
Brand Adafruit
EAN 0720189973253
Label Adafruit Industries
Manufacturer Adafruit Industries
Model 2124
MPN 2124
PartNumber 2124
Publisher Adafruit Industries
Studio Adafruit Industries
ReleaseDate 0000-00-00

Country	USA
Brand	Adafruit
EAN	0720189973253
Label	Adafruit Industries
Manufacturer	Adafruit Industries
Model	2124
MPN	2124
PartNumber	2124
Publisher	Adafruit Industries
Studio	Adafruit Industries
ReleaseDate	0000-00-00

Power Management IC Development Tools Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On (1 piece)

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