From 7cb9bbe7a285867d76c9d535709383a425cba7c7 Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Thu, 16 Nov 2023 09:28:21 -0700 Subject: [PATCH] add a paragraph about how to hook up a pressure sensor to an EasyMotor --- doc/motortest-installation.inc | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/doc/motortest-installation.inc b/doc/motortest-installation.inc index 3914bc70..778a914f 100644 --- a/doc/motortest-installation.inc +++ b/doc/motortest-installation.inc @@ -57,6 +57,16 @@ connector, are readily available through various vendors including Amazon, eBay, and AliExpress. + These pressure sensors have three wires and sometimes a + shield around those wires. The colors of the wires can vary, + but typically are red for power, black for ground, and green + for the analog output. Hook red to '+5', green to 'PRES', and + black to one of the two 'GND' screws on the board. The other + 'GND' screw is available for connecting the shield if one is + present. This is mostly relevant if you're using the product + for static testing on the ground with a longer than usual + cable. + To log in-flight chamber pressure, a typical approach might be to drill a 1/8" sampling hole all the way through the center of the motor's forward closure, then @@ -68,4 +78,5 @@ If you aren't up for machining closures yourself, link:http://lokiresearch.com[Loki Research] sells 54mm and 75mm "experimental bulkheads" with threaded - sensor ports that can be used with snap ring cases. + sensor ports that can be used with snap ring cases, + and other related mechanical bits and pieces. -- 2.30.2