#Adafruit trinket current pro
Adafruit Pro Trinket 5V 16MHz (1 Piece) 12.82. Sold by kjdElectronics and ships from Amazon Fulfillment. Uses the 5V input via Micro-B USB connector on the Pro Trinket This item: Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On.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. The charge current is 100mA by default, so it will work with any size battery and USB port. When the battery is fully charged and ready for use, the green LED turns on.Ĭharging 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. There are two LEDs - one red and one green. 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. (Technically its overclocking but we've never seen that affect the microcontroller itself, AVRs are happy to overclock without complaint). However, many times, you can run a 5V microcontroller + accessories off of the ~4V from the LiPoly battery with no problem. Ideally, this backpack is for use with the 3.3V Pro Trinkets & ItsyBitsy, so that the battery voltage (3.7V-4.2V) will get regulated down to 3.3V on the board. Unplug the USB port and the microcontroller will switch over to the rechargeable battery. When the Pro Trinket or ItsyBitsy USB port is powered, the battery is recharged automatically. Instead of wiring 2 or 3 boards together to make a charging system, this little PCB sits on top of the PCB and allows a LiPoly/LiIon battery to plug in. This LiPoly backpack is great for the ItsyBitsy and Trinket boards.
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