#Adafruit trinket backpack how to#
#Adafruit trinket backpack full#
#Adafruit trinket backpack pro#
#Adafruit trinket backpack Bluetooth#

#Adafruit trinket backpack how to#

This guide explores how to use LED matrix, 7-segment, and 14-segment quad alphanumeric displays with CircuitPython and MicroPython!Д«e sure to check out the Adafruit LED Backpack guide for details on all of the LED backpack modules. Because these displays use LEDs they're bright and easy to read-perfect for showing simple measurements, time, basic graphics, and more.ДЄnd now you can use LED backpack displays with Python. These displays come in all sorts of varieties, like matrices that are a grid of LED pixels or segment displays that can show numbers and characters. LED backpacks are bright and beautiful LED displays with a built-in controller chip that makes them super easy to use. Follow the guide to see both CircuitPython and MicroPython versions of the LED backpack library. That means, back to the design table for the 3D printed housing.! Note the video above was made showing the MicroPython version of this library.

#Adafruit trinket backpack full#

The trinket output is limited to 150mA, thus the neopixel should be powered externally, thus I answer myself: I need to use the powerboost500 to fully power the neoring if I want, giving me 2 hours of operation with a 1Ah battery or 20 with a 10Ah external usb bank, right?ДЄlso, 30 gauge will work up to 150mA (perfect if I only use the trincket), but if I want to use the neoPixel to full power I'd need to use 24 AWG or less (24 can deal with more than 500mA).

So either I use them dimmed or I use an external battery bank.ДЄnyway, that would mean I would be at a peak of 500mA and usually around 200mA. The 24RGB_Neopixel ring is 24*19mA(datasheet for the WS2812)? -> About 456 mA at maximum output.

#Adafruit trinket backpack Bluetooth#

That means for power consumption, power supplied through the trinket, I've got to count the ring and the bluetooth module. (A variation of the camera ring but being able to change colors/scenes on the fly). *Trinket+two/three buttons+bluetooth module+24RGB_ring. My only concern now is what is the difference between those options to power my project. That is essentially what I want to do with the PowerBoost. That way you can shut it off when the project is supposed to be off, reconnect for power or to allow it to be charged through the micro-usb. Yup, the LiPo backpack can be embedded with a switch for the battery. 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. The two 0.1' holes with a box around them are the battery output line. If you want to add an On/Off switch, we also made that really easy.

#Adafruit trinket backpack pro#

I now will change the setup and use a 3V Pro Trinket instead, w/LiPoly backpack and 3.7V LiPoly battery attached, and a step-up regulator (3-5V) as well as a logic level shifter to get the 5V devices running. Good that I asked before building the solution. When you disconnect 5v, the boost circuit gets power from the battery. When you connect 5v from a wall supply, the LiPo charger drops the voltage to match the LiPo, but provides most of the current that goes to the boost circuit. That has a built-in LiPo charger connected upstream from the boost circuit. You'd be better off using a PowerBoost 500C. You lose 20% of the power through the PowerBoost, so the battery will basically drain itself. Is that correct?ДЄdafruit_support_mike wrote:You have a power loop.Д¬urrent from the LiPo will go through the PowerBoost, get boosted to 5v, go into the Pro Trinket to the LiPo Backpack, then back through the LiPo charger to the battery. Can you confirm that this setup will work and will not break the components?ДЄdditional question: if the LiPoly Backpack power switch is used, it will only turn on/off the Pro Trinket when not plugged into USB, or? My understanding (even with the standard use of the LiPoly backpack) is, that as soon as USB is plugged in, the Pro Trinket will switch to use the USB power, and it does not matter, whether the switch is on or off.

So the Pro Trinket should run with power around 5V in both cases, with USB plugged in or with LiPoly battery used. Power Boost output 5V and GND -> input to Pro Trinket BAT+ and GND LiPoly Backpack output BAT and GND -> input to Power Boost BAT and GND This is needed to charge the battery when the Pro Trinket is plugged to USB. Battery connected to LiPoly Backpack, Pro Trinket BUS -> LiPoly Backpack 5V, also GND. provide 5V (and not only 3.7V of the LiPoly battery) to the Pro Trinket Also, the box is already done, and I'm going to use the USB port of the Pro Trinket and cannot change to a separate USB socket. I need to work with ~5V in this project, because some of the devices I'm going to attach don't work with 3.3V. Adafruit PowerBoost 500 Basic (or similar step-up regulator) ( ) Adafruit Pro Trinket LiIon/LiPoly Backpack Add-On ( )