3 ms·

I have had similar impulses over the years, and I am currently applying myself to learning the fundamentals of pinball mechanisms. It is so satisfying to wind

I have had similar impulses over the years, and I am currently applying myself to learning the fundamentals of pinball mechanisms. It is so satisfying to wind ones own servo and use it for different purposes. There's a whole world of things to start building if you start with a generalized interest of first principles in a subject. These pneumatics have got me seriously wondering about building a pneumatic pinball machine using the same principles ..

markovs_gun 3mo ago
I'm a chemical engineer and I've worked in some old plants. Before modern electronic control, everything was controlled by pneumatics. A control loop would literally be something like a pressure gauge connected to an air valve, so that when pressure increased the air flow would change and proportionately close off another valve upstream, and when it would decrease, the air would open the valve up. There were also complex logic circuits set up this way entirely with air pressure. Really amazing stuff when you can look at the control panels because operators were opening and closing air valves to control everything and it works just like an analogue circuit, but it's all air pressure instead of voltage and air lines instead of wires.
- MomsAVoxell 3mo ago
  Oh that is indeed fascinating! Especially when you consider that it is these kinds of forces at work, at a different scale and medium, anyway. I think some kind of combined water/air pinball machine could be constructed, with the right balance in choice of materials for the ball, it could result in a playable pneumatic pinball mechanism. It's just a matter of leverage. ;)
  - markovs_gun 3mo ago
    I think you'd really only need pneumatics/hydraulics for the scoring and any special effects. You can accomplish ball launches and paddles completely with basic mechanical parts. For example, you could have the score be represented by a water reservoir filling up and score events could just open the valve to fill. Ball counter could also be completely mechanical.
- NetMageSCW 3mo ago
  The HVAC in my work building (which is absolutely terrible) is controlled by pneumatic air pressure to each thermostat and to a valve controlling hot water flow in the air vent path.

markovs_gun 3mo ago

I'm a chemical engineer and I've worked in some old plants. Before modern electronic control, everything was controlled by pneumatics. A control loop would literally be something like a pressure gauge connected to an air valve, so that when pressure increased the air flow would change and proportionately close off another valve upstream, and when it would decrease, the air would open the valve up. There were also complex logic circuits set up this way entirely with air pressure. Really amazing stuff when you can look at the control panels because operators were opening and closing air valves to control everything and it works just like an analogue circuit, but it's all air pressure instead of voltage and air lines instead of wires.

MomsAVoxell 3mo ago
Oh that is indeed fascinating! Especially when you consider that it is these kinds of forces at work, at a different scale and medium, anyway. I think some kind of combined water/air pinball machine could be constructed, with the right balance in choice of materials for the ball, it could result in a playable pneumatic pinball mechanism. It's just a matter of leverage. ;)
- markovs_gun 3mo ago
  I think you'd really only need pneumatics/hydraulics for the scoring and any special effects. You can accomplish ball launches and paddles completely with basic mechanical parts. For example, you could have the score be represented by a water reservoir filling up and score events could just open the valve to fill. Ball counter could also be completely mechanical.
NetMageSCW 3mo ago
The HVAC in my work building (which is absolutely terrible) is controlled by pneumatic air pressure to each thermostat and to a valve controlling hot water flow in the air vent path.