Tell us about yourself!
Thank you very much!I'm just going to add that your router's IP will change periodically, so it might be a good idea to also set up dynamic DNS: https://www.andreagrandi.it/2014/09/02/configuring-ddclient-to-update-your-dynamic-dns-at-noip-com/Also, if you're opening yourself up to the whole internet, it might be worth doing some extra security stuff https://www.raspberrypi.org/documentation/configuration/security.md
Hi, the arduino can sample the ADC at only about 9kHz, which gives much less precise than with your examples. It has an accuracy of +-25Hz when measuring a signal of about 700Hz, since the wave period is only 13+-1 samples (9000Hz/700Hz). Is it feasible to improve this program so it takes into account not just one but all the peaks in the autocorrelation output for grater accuracy? (measuring and averaging the period of 10 consecutive waves is more accurate than just measuring one)
Ode to the Uno
I'd be very interested in seeing that! The proof of concept exists, (https://www.youtube.com/watch?v=CDohWwEXQ68) but its not very functional. The next step would be to include simple sensing and decision making (even as simple as stopping when it hits an obsticle)
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a simpler circuit with an opto-isolator (although the resistor value needs to be higher to work with 230v)http://www.windandwet.com/software/datalogger/frequency.php
Of course, its physically impossible to make a microfluidic chip on par with the complexity and speed of an electronic chip. Research is still ongoing in this field, so the number of valves that can fit on a chip is increasing as manufacturing methods get more precise. Still, future chips will most likely not have more than a couple of bytes of memory and preform very simple functions.This is still useful as they can be integrated into devices like lab-on-a-chip or soft robots and provide control without external electronics and electromechanical valves
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Agreed. It would also make the circuits more compatible with soft robotics
Thanks for the advice.I found footage of a braille display based an a fluidic shift register https://www.youtube.com/watch?v=7A9vwt2aj5Y
3D Printed Pneumatic Logic GatesView Instructable »
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Will do! Thanks for letting me know. I've been working on an SLA 3d printed version of this project, I'll publish that soon.
Creative use of the solar powered turntable, I like it
Is there a cheaper alternative to the Electro-Technic BD-20AC handheld corona treater?
Can you use the jam to make a perfect replica of their papillary ridges and press it against their touch ID protected iphone to unlock it? X)
Puzzling... My buffer should have a very high gain - the output is connected directly to the source or atmosphere.I've not yet considered miniaturising my gate, at the moment Im trying to make a 3d printed mold (using laser cut plexiglass for the top and bottom to achive a smooth surface) that I can pour silicone into and get the flow layer and membrane as one peice
I have figured out how to turn heaphones into electromechanical valves - this will be my 2nd instrucable
I have included the STL files for a mould. I'm having a friend print it for me
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.
Im glad you like it
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
Thanks, but I dont think these are designed accurately cut rubber, it would probably stretch and cause some lines to be longer than others
Pneumatic Logic Gates Made With Simple ToolsView Instructable »
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?
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
I guess by adding a transistor which connected the output to the input when a pulse is sent to it.
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 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
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
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.
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