GPIO breakout - Revision history

G8GKQ: /* Portsdown GPIO extender - version 2 */

2021-10-18T13:31:39Z

Portsdown GPIO extender - version 2

G8GKQ: /* GPIO Extender Card - version 1 */

2021-10-18T13:30:33Z

GPIO Extender Card - version 1

G8GTZ: /* Portsdown GPIO extender - version 2 */

2021-10-18T13:21:02Z

Portsdown GPIO extender - version 2

G8GTZ at 13:12, 18 October 2021

2021-10-18T13:12:53Z

G8GTZ at 13:10, 18 October 2021

2021-10-18T13:10:09Z

G8GTZ: Created page with "===GPIO Extender Card=== In the completed unit, there are 13 signals that need to be routed in or out of the GPIO interface on the RPi. Buying an extender card early in the..."

2017-04-07T17:08:43Z

Created page with "===GPIO Extender Card=== In the completed unit, there are 13 signals that need to be routed in or out of the GPIO interface on the RPi. Buying an extender card early in the..."

New page

===GPIO Extender Card===

In the completed unit, there are 13 signals that need to be routed in or out of the GPIO interface on the RPi. Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely. The card must break out all 40 pins of the GPIO, and have another connector on top for the LCD display.

Because of this the Portsdown team have designed a PCB for the job - the blank PCB is available from the BATC shop. ''(If you bought a [[Willow components breakout card|breakout card from Willow]] it can still be used, but we recommend you use this card and put the Willow card in your next project box.)''

[[File:screw t.jpg|400px]]

The BATC card is very simple to construct with no components other than plugs and sockets.

The circuit is available for download here:

[[:File:PORTSDOWN INTERFACE SCH.pdf]].

You can buy the GPIO Extender Card blank PCB from the [https://batc.org.uk/shop/portsdowntc Portsdown section in the BATC shop - item 6]

The "extra tall stacking header" to connect to the Rpi is available from Adafruit - https://www.adafruit.com/product/1979
Or from [https://thepihut.com/products/stacking-header-for-raspberry-pi-2x20-extra-tall-header?utm_medium=cpc&utm_source=googlepla&variant=1130974052&gclid=CPbW85HokdMCFW4R0woduG4LBw the Pi hut]

The white sockets in the picture above are used to connect to other Portsdown boards and are available from Farnell or you can just hard wire from the pads on the board and pass the wires through the large holes behind the pins.

5 Pin 9731636 http://uk.farnell.com/molex/22-05-7058/header-tht-right-angle-2-54mm/dp/9731636
4 Pin 9731628 http://uk.farnell.com/molex/22-05-7048/connector-header-tht-ra-2-54mm/dp/9731628
3 pin 9731610 http://uk.farnell.com/molex/22-05-7038/connector-header-tht-ra-2-54mm/dp/9731610

Or you can use screw terminal - Farnell part numbers as follows:

3 Way [http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=2396254&storeId=10151 2396254]
4 Way [http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=2396253&storeId=10151 2396253]
5 Way [http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=2112483&storeId=10151 2112483]
6 Way [http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=2396255&storeId=10151 2396255] (only required to connect to a DigiThin modulator - a previous BATC project and not part of the Portsdown project)

@@ Line 37: / Line 37: @@
 ==Portsdown GPIO extender - version 2==
-Designed for the Rpi 4.
+Designed for the Raspberry Pi 4 based Portsdown 4.
-Some changes to the original Portsdown interface were needed with some GPIO changes on the Raspbery PI 4, unused functions were removed and additional ones added.
+Some changes to the original Portsdown interface were needed with some GPIO changes on the Raspbery Pi 4, unused functions were removed and additional ones added.
 [[File:Interface V2-12.jpg|400px]]

@@ Line 3: / Line 3: @@
 ==GPIO Extender Card - version 1==
-Designed for the original Portsdown system.
+Designed for the original Portsdown system based on a Raspberry Pi 3.
 In Portsdown, there are up to 13 signals that need to be routed in or out of the GPIO interface on the RPi.  Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely.  The card must break out all 40 pins of the GPIO, and have another connector on top for the LCD display.

← Older revision		Revision as of 13:21, 18 October 2021
Line 36:		Line 36:

	==Portsdown GPIO extender - version 2==		==Portsdown GPIO extender - version 2==
		+
		+	Designed for the Rpi 4.

	Some changes to the original Portsdown interface were needed with some GPIO changes on the Raspbery PI 4, unused functions were removed and additional ones added.		Some changes to the original Portsdown interface were needed with some GPIO changes on the Raspbery PI 4, unused functions were removed and additional ones added.

← Older revision		Revision as of 13:12, 18 October 2021
Line 1:		Line 1:
		+	From November 2021 there will be 2 versions of the Portsdown GPIO PCB available from the BATC shop - https://batc.org.uk/category/portsdown/
		+
	==GPIO Extender Card - version 1==		==GPIO Extender Card - version 1==
		+
		+	Designed for the original Portsdown system.

	In Portsdown, there are up to 13 signals that need to be routed in or out of the GPIO interface on the RPi. Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely. The card must break out all 40 pins of the GPIO, and have another connector on top for the LCD display.		In Portsdown, there are up to 13 signals that need to be routed in or out of the GPIO interface on the RPi. Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely. The card must break out all 40 pins of the GPIO, and have another connector on top for the LCD display.

@@ Line 1: / Line 1: @@
-===GPIO Extender Card===
+==GPIO Extender Card - version 1==
-In the completed unit, there are 13 signals that need to be routed in or out of the GPIO interface on the RPi.  Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely.  The card must break out all 40 pins of the GPIO, and have another connector on top for the LCD display.
+In Portsdown, there are up to 13 signals that need to be routed in or out of the GPIO interface on the RPi.  Buying an extender card early in the project reduces the chance of damage to the RPi and allows these connections to be made safely.  The card must break out all 40 pins of the GPIO, and have another connector on top for the LCD display.
 Because of this the Portsdown team have designed a PCB for the job - the blank PCB is available from the BATC shop.  ''(If you bought a [[Willow components breakout card|breakout card from Willow]] it can still be used, but we recommend you use this card and put the Willow card in your next project box.)''
@@ Line 30: / Line 30: @@
 Way [http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=2112483&storeId=10151 2112483]
 Way  [http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=2396255&storeId=10151 2396255]    (only required to connect to a DigiThin modulator - a previous BATC project and not part of the Portsdown project)