Photon Pixel Shield v7 No Diode and No Fuse
author: bwshockley
2 layer board of 1.76 x 1.41 inches (44.7 x 35.8 mm)
Uploaded:
July 12, 2018
Shared:
July 12, 2018
Total Price:
$12.35
Photon Pixel Shield - No Diode and No Fuse Version
The photon pixel shield is a small board for interfacing between a particle.io photon and some WS2812 based LED strips. Specifically, this board was made to drive Neopixel strips.
Power Requirements
The board takes in 5V only and is used to power the photon and the pixel strip. Please note that current requirements are mostly driven by the number of LEDs being driven. Each WS2812 LED uses an estimate of 20mA, which can add up quickly.
50 Neopixels: 1A 100 Neopixels: 2A
This board version has no fuse or diode, so the only power requirement consideration is your power supply.
Digital Control
The WS2812 based LED strips can be controlled via the photon and the Neopixel library from Adafruit built by technobly. No digital pin is selected by default on the board. Pin D2 is the default in the library. To use the default connect the solder jumper for D2 on the back of the board. Otherwise, you may select almost any digital pin in both software on through the jumper on the board.
BOM
The majority of the BOM, which as of 12-JUL-18, can be found on Mouser.com for around $3.50.
Power LED
A simple 3mm power LED is required if you wish to have a power indicator. The resistor marked RLED on the board is for the LED. Populate with an appropriate resistor value for the LED chosen. You can use this calculate for sizing the resistor.
Photon Pixel Shield - No Diode and No Fuse Version
The photon pixel shield is a small board for interfacing between a particle.io photon and some WS2812 based LED strips. Specifically, this board was made to drive Neopixel strips.
Power Requirements
The board takes in 5V only and is used to power the photon and the pixel strip. Please note that current requirements are mostly driven by the number of LEDs being driven. Each WS2812 LED uses an estimate of 20mA, which can add up quickly.
50 Neopixels: 1A 100 Neopixels: 2A
This board version has no fuse or diode, so the only power requirement consideration is your power supply.
Digital Control
The WS2812 based LED strips can be controlled via the photon and the Neopixel library from Adafruit built by technobly. No digital pin is selected by default on the board. Pin D2 is the default in the library. To use the default connect the solder jumper for D2 on the back of the board. Otherwise, you may select almost any digital pin in both software on through the jumper on the board.
BOM
The majority of the BOM, which as of 12-JUL-18, can be found on Mouser.com for around $3.50.
Power LED
A simple 3mm power LED is required if you wish to have a power indicator. The resistor marked RLED on the board is for the LED. Populate with an appropriate resistor value for the LED chosen. You can use this calculate for sizing the resistor.
