Difference between revisions of "Digital Pressure Gauge for Keg"

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More info to come.
 
More info to come.
  
==Goal==
+
===Goal===
 
Monitor and adjust CO2 pressure on a keg, for carbonation and serving.
 
Monitor and adjust CO2 pressure on a keg, for carbonation and serving.
  
==Plumbing==
+
===Plumbing===
  
 
Corny keg gas quick-disconnect (1/4" male flare) -> 1/4" female flare nut -> short 1/4" aluminum tubing, flared -> 1/4" compression-to-FPT adapter -> 1/4" MPT w/ Schrader (tire) valve
 
Corny keg gas quick-disconnect (1/4" male flare) -> 1/4" female flare nut -> short 1/4" aluminum tubing, flared -> 1/4" compression-to-FPT adapter -> 1/4" MPT w/ Schrader (tire) valve
  
The FPT side of the compression adapter was drilled from the side to accept the nozzle of a piezo pressure sensor from AllElectronics, which will be JB-Welded in place.
+
The FPT side of the compression adapter was drilled from the side to accept the nozzle of a piezo pressure sensor (see [Circuit] below).  Pressure sensor was JB-Welded in place.
  
==Circuit==
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===Circuit===
 
+
* Input: PRESSURE TRANSDUCER TDR-120 from [[allelectronics.com]] ($1/ea, surplus; no longer available)
TBD. Will use AVR to read analog voltage/resistance from sensor. Segment display? Web-enable?
+
* Logic: Will use AVR to read analog voltage/resistance from sensor.
 +
* Output: Segment display? LCD? Web-enable? Bluetooth?

Revision as of 07:57, 14 March 2012

More info to come.

Goal

Monitor and adjust CO2 pressure on a keg, for carbonation and serving.

Plumbing

Corny keg gas quick-disconnect (1/4" male flare) -> 1/4" female flare nut -> short 1/4" aluminum tubing, flared -> 1/4" compression-to-FPT adapter -> 1/4" MPT w/ Schrader (tire) valve

The FPT side of the compression adapter was drilled from the side to accept the nozzle of a piezo pressure sensor (see [Circuit] below). Pressure sensor was JB-Welded in place.

Circuit

  • Input: PRESSURE TRANSDUCER TDR-120 from allelectronics.com ($1/ea, surplus; no longer available)
  • Logic: Will use AVR to read analog voltage/resistance from sensor.
  • Output: Segment display? LCD? Web-enable? Bluetooth?