Difference between revisions of "LatchPowerCircuit"

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(Created page with "...Back to Projects: 600px = The Electronic Paper Display Adapter Board = == Introduction == Simple circuit that can be used to power ON/OFF anyt...")
 
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...Back to [[Projects:]]
 
...Back to [[Projects:]]
  
[[File:epaperdisp.JPG|600px]]
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[[File:rPipowerOnPi.png|600px]]
  
= The Electronic Paper Display Adapter Board =
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= Latch Circuit Board =
 
== Introduction ==
 
== 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.   
 
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.   
  
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== Schematic ==
 
== Schematic ==
[[File:epaperboardsch.png|1000px]]
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[[File:rPiSCH.png|1000px]]
  
 
== Purchase ==
 
== Purchase ==
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== Assembly ==
 
== 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. 
 
 
[[File:epaperboardfront.JPG|400px]]
 
 
[[File:epaperboardback.JPG|400px]]
 
 
[[File:epaperboardondisplay.JPG|400px]]
 
 
== Displays Tested ==
 
 
* [https://www.waveshare.com/product/modules/oleds-lcds/e-paper/7.5inch-e-paper.htm 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 [https://github.com/ZinggJM/GxEPD 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 [http://www.kevindarrah.com/download/GxEPD-master.zip 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. 
 
 
[http://www.kevindarrah.com/download/trigBoard7p5epaper_FORVIDEO.zip Hello World Code]
 

Revision as of 20:49, 25 July 2018

...Back to Projects:

RPipowerOnPi.png

Latch Circuit 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

RPiSCH.png

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