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I tried this, and it cut fine, but the silicone wouldnt stick together even after I cleaned it with acetone - its surface felt more like plastic than of rubber. I think the 3d printed mould is a better solution.
I have included the STL files for a mould. I'm having a friend print it for me
Im glad you like it
Thanks, but I dont think these are designed accurately cut rubber, it would probably stretch and cause some lines to be longer than others
Yes, engineers came up with very creative solutions to these problems before microcotrollers existed. I read about fluidics being used in everything from autopilots to industrial control systems in the 1960s. Maybe this technology could be revivied with 3d printing and modern manufacturing techniques
Pneumatic Logic Gates Made ...View Instructable »
Intro to Fusion 360: Lamp Design
Nice!I just designed and made a fluidic D-Latch with no static power consumtion, currently working on the instrucable.
does silicone rubber work instead of PDMS?
3D Printing Class
Nice! Just one suggestion:You might want to include the resistor in the LED module, since beginners might break the LED if they forget to add the resistor themselves. This would also allow other modules which dont require a resistor to be added after the LED.
Yes, I used the laser to cut the holes. However, the cut holes have an edge that sticks out, which I had to cut down with a knife, as it prevented the membrane from making a seal. I will proboably drill them separately next time. I am looking forward to seeing your shift register. Another project that could be done with latches would be a state machine, but that would require many more transistors to implement the rest of the circuitry. A paper on the subject (in case you havent read it already): https://drive.google.com/open?id=0B2WWZT7UHlGyTGVhYmxPSFlwRUE
Well, I guess it didnt work as I expected. Thank you for testing it. Hopefully I'll get a chance to play around with this myself when I learn how to use CAD software properly (which might not be for a while, since I've got my final exams coming up). I did mange to design and laser engrave a braille display character cell (its far from a working prototype, but I'll keep working on it).
I guess by adding a transistor which connected the output to the input when a pulse is sent to it.
I have thought of a latch design which would furtherer reduce air consumption.It works based on capacitance, and only consumes air while being read or written to. There might be some leakage current from the fluidic transistors and it may have to be refreshed every couple of minutes, although that time can be extended by adding a capacitor at the cost of a bigger current when setting the latch.Sources which I go the idea from:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC41406...http://www.northdownfarm.co.uk/rory/tim/tim-8.htm
There is no need for a separate resistor. The resistor which is part of the 3rd inverter is used to connect the buffered output with the input. I though it would be useful with prototyping if you don't have to design a new chip every time, and instead just rearrange the tubes. For example connecting inverters in parallel or series and blocking off some vacuum sources would make NOR and NAND gate chips. I also thought of an implementation of a 4 transistor XOR gate design.
Nice! You dont have to convince to start making these circuits, Im just having some troble getting the tools together. I might try using a laser engraver at my local hackerspace, since I dont have any experience with CNC
Mold Making & Casting Class
I was thinking about how the inverter chip used here could be connected up in different ways to perform different functions, not just as a NOT gate. Here is a D-latch design that could be used to make a shift register. (1st diagram from Figure 8 of https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2917228/ )
Im having trouble finding the right sized tubing that isnt so expensive. Could you pint me in the right direction?
If the logic circuits were made smaller, a compact multi-line braille display could be made https://www.youtube.com/watch?v=0fIg4rI4cDw
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