 | | Re: EGAD! (pneumatics) —Rob Stehlik
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| | | (...) Yes! These are the adapters for the miniature airline I was talking about. I used them in my window walker to connect the pneumatic tubing to the suction cups: (2 URLs) Rob (21 years ago, 14-Jun-03, to lugnet.technic)
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| | | | | Re: EGAD! (pneumatics) —Mark Tarrabain
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| | | | (...) Sweet! So with these adapters, I can use regular aquarium hoses, which can be bought for pennies a foot -- way cheaper than LEGO tubing. Elbow, tee, and cross connectors for aquarium hoses are also really cheap, and I've seen aquarium hose (...) (21 years ago, 15-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | Re: EGAD! (pneumatics) —Soh Chio Siong
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| | | | (...) Is this what you're looking for? A 3/8 RCX Output Multiplexer for the FT solenoid valves: (URL) the circuit diagram is a piece of art from France :-) (21 years ago, 15-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | Re: EGAD! (pneumatics) —Mark Tarrabain
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| | | | (...) Close. What I would actually be wanting is eomthing that could use the voltage level being output from a *SINGLE* RCX port to do the addressing. So for controlling up to four devices from one port, for example, would require that 25% power to (...) (21 years ago, 15-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | Re: EGAD! (pneumatics) —Kevin L. Clague
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| | | | | (...) You are doing well Mark. You can use three voltage comparators to detect which voltage level is being output. What you need is three comparators. One for 25%, then 50%, and 75%. If 75% is on, then you'll need to gate off the 25% and 50% (...) (21 years ago, 15-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | | Re: EGAD! (pneumatics) —Mark Tarrabain
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| | | | | | (...) I was thinking that one could just use an ADC to directly convert the analog voltage level to a digital number of however many bits you could resolve it to and then taking that binary number to address a demux and have the demux's outputs (...) (21 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | | | Re: EGAD! (pneumatics) —Kevin L. Clague
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| | | | | | (...) When using LEGO's firmware and NQC the maximum number of power levels you have is 8 (plus off?), so the most you can identiy is 9. This of course presumes that current draw by your compressor's motors doesn't mess with the voltage going into (...) (21 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | | | Re: EGAD! (pneumatics) —Mark Tarrabain
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| | | | | | (...) Yes, the switches would need to remember their last set state. Ideally, this would be done through the use of electric pneumatic switches which, when not receiving any power, simply stay in the last position they were set in. If this isn't (...) (21 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | Re: EGAD! (pneumatics) —Soh Chio Siong
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| | | | | (...) Wow, that'll be great! (...) Keep at it. (21 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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| | | | | | Re: EGAD! (pneumatics) —Philippe Hurbain
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| | | | (...) IMHO, it would be much simpler and precise to measure directly pulse width instead of voltage, that could be done easily with a small microcontroller... Philo www.philohome.com (21 years ago, 16-Jun-03, to lugnet.technic, lugnet.robotics)
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