About the author : Dalibor
The last part of the manifold was the pressure gauge, I had the 0-100 torr baratron, but no controller. The baratron needs supply of +15V and -15V. It gives linear output of 0-10V for 0-100 torr. So I build a simple power supply using two zener diodes (15V) and two 15Ω resistors. If You are interested in schematics, just write a comment. The input power is 40V, output ±15V. A cheap voltmeter from Ebay was used to display the output:
Its range is 0-10V, so I used it for output directly. I intentionally wanted to open it and swap the decimal point, but this would mean some extra time what I can’t afford now ;-) So when the baratron output is 5.25V, it means 52.5 torr, but the voltmeter shows just 5.25, I have to multiply it by ten to get right readout in torr.
In action, the controller reads 4.07V what means 40.7 torr. I plan to place another controllers (high vacuum one at least) into that box, so this is the reason for such a large one ;-)
Good thing is that the baratron is not dependent on type of gas inside as pirani or thermocouple gauges are.. It shows right pressure for all gases.
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Hi Dalibor, great baratron controller!
Would be great to see the schematic and component list if you have time.
Kind regards
Paul.
Hello.
Your Nixie Tubes and baratron controllers look amazing. Can you send me the schematics and component list of the baratron controller?
Thank you for your time.