LatchPowerCircuit - Revision history

Krdarrah at 16:23, 30 July 2018

2018-07-30T16:23:07Z

Krdarrah at 15:51, 30 July 2018

2018-07-30T15:51:16Z

Krdarrah at 03:51, 26 July 2018

2018-07-26T03:51:20Z

Krdarrah at 03:49, 26 July 2018

2018-07-26T03:49:09Z

Krdarrah: 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..."

2018-07-26T03:43:54Z

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..."

New page

...Back to [[Projects:]]

[[File:epaperdisp.JPG|600px]]

= 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 ==
[[File:epaperboardsch.png|1000px]]

== Purchase ==
Given out through Patreon, but contact me if interested.

== Parts ==
The parts list can be downloaded [http://www.kevindarrah.com/wp-content/uploads/2018/07/epaperBOMv2.xlsx **HERE**]. This can be directly uploaded into [https://www.digikey.com 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.

[[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]

← Older revision		Revision as of 16:23, 30 July 2018
Line 24:		Line 24:
	== Assembly ==		== Assembly ==

−	[[File:latchAssembled.png\|~~400px~~]]	+	[[File:latchAssembled.png\|600px]]
		+
		+	[[File:rPiPowerback.png\|600px]]

← Older revision		Revision as of 15:51, 30 July 2018
Line 23:		Line 23:

	== Assembly ==		== Assembly ==
		+
		+	[[File:latchAssembled.png\|400px]]

@@ Line 20: / Line 20: @@
 == Parts ==
-The parts list can be downloaded [http://www.kevindarrah.com/wp-content/uploads/2018/07/epaperBOMv2.xlsx **HERE**].  This can be directly uploaded into  [https://www.digikey.com Digikey] if you'd like.
+The parts list can be downloaded [http://www.kevindarrah.com/download/rPiBOMv1.xlsx **HERE**].  This can be directly uploaded into  [https://www.digikey.com Digikey] if you'd like.
 == Assembly ==

@@ Line 1: / Line 1: @@
 ...Back to [[Projects:]]
-[[File:epaperdisp.JPG|600px]]
+[[File:rPipowerOnPi.png|600px]]
-= The Electronic Paper Display Adapter Board =
+= 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 ==
-[[File:epaperboardsch.png|1000px]]
+[[File:rPiSCH.png|1000px]]
 == Purchase ==
@@ Line 18: / Line 23: @@
 == Assembly ==