Difference between revisions of "LatchPowerCircuit"
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Revision as of 21:43, 25 July 2018
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Contents
The Electronic Paper Display Adapter Board
Introduction
Simple circuit that can be used to power ON/OFF anything and keep power consumption extremely low. This design was for a raspberry Pi, so that a single button can bee used to power up and safely shutdown the Pi.
Schematic
Purchase
Given out through Patreon, but contact me if interested.
Parts
The parts list can be downloaded **HERE**. This can be directly uploaded into Digikey if you'd like.
Assembly
The board hooks up to the trigBoard in the same way as other adapter boards - see WeatherBoard for a full walkthrough of the assembly.
Displays Tested
- 7.5" Waveshare Display NOTE!! Solder jumpers should be in the 0.47 and SPI-4 positions. Look closely at the assembly photos.
Code
NOTE: everything is tested with an ESP8266 and 7.5" Waveshare display!
Library
The library I started with is from HERE
But I found that I had to modify this to work with the 7.5" display - this modified library that I use is archived HERE
I basically just changed the ESP8266 code to use the same paged update that the AVR uses.
Hello World
This code just demonstrates basic wiring and configuration by displaying "Hello World" on the display. This is a good point to start from.
