fischertechnik community forum

@Vleeuwen Thanks a lot! If I have a very small part of your knowledge I could also start up the Linux part. At my age it is no longer feasible for me to learn this knowledge. I suspect this will be one of my last small projects. Too many limitations, diabetes, bad eyes, oblige me to less activity. @...

I sometimes wonder if you are really aware what level of sheer power you have there. This board is heavily subsidized by Intel. Try to find a än official dealer for the FPGA alone will give you a price significantly higher than the one you paid for the entire de0 nano. This chip is expensive and po...

I'm close to believing that one day you'll present us with a homebrew ft based nuclear fusion reactor... Hi Peter, it won't run that fast. I'm just past 77 years old. Everything I make now is just for fun and to keep me busy. I don't need it at all. You may think why you need all these inputs for. ...

Testing of the spi motor module. The module contains 3 TB6612 motor drivers to control 6 motors. Full control of the motors is done in the De0 nano soc module. The commands are sent by the TXT controller over the I2C connection. The motors get support for quadrature encoders, min and max switch, hom...

With the new acquisition, a 4 channel analog scope, it is again easier to make measurements. The scope has a bandwidth of 50MHz and a sampling up to 1 Gs/sec. An extra large buffer makes a deep analyze possible. The scope is connected to 4 coax 50 ohm cables. To have no extra distortion of the signa...

The harware with the DE0-nano soc module for the TXT Controller is ready. Controller with DE0-nano soc module. This controller works together with the TXT controller of Fischertechnik via an I2C connection. The TXT is connected to the PC. With this own controller a lot of extensions are possible. Al...

Ich hatte auch ein Video. Dies illustriert die Funktionsweise der verschiedenen Module.

https://youtu.be/yZnnx5vvjQU

Frans.

Early 2018 I also assembled a number of modules. The control was via the TXT controller and a FPGA module that was connected via I2C. On the TXT control you can see better the different modules. Here are some links to the images: https://www.flickr.com/photos/fotoopa_hs/28132493079 https://www.flick...

Final assembly of the DE0-nano soc board for the fischertechnik control unit. Different connections can be provided via separate side plates. Because of this I have a more more flexible assembly. The TXT controller is connected via I2C. On the backside are already 4x SPI connectors and the I2C conne...

Basic housing for 6x motor control. Now I have to 3D print the cover and assemble everything. SPI refresch cycle is 14 usec. Besides the 6 motor outputs there are 24 digital inputs. These are connected via the cover. On top of that there is a rotary encoder, 4 pushbuttons and 2 leds that indicate wh...

I just make these modules for the fun of building something. They are very cheap and useful on all my DE0-nano versions. SPI is very simple and not time critical. The clock may even change between near DC to very high speeds during the transfer. So they are also suitable for micro controllers. In th...

More digital fast speed inputs (96) and outputs via spi modules. I made a basic spi module with 3x 74hc165 and 3x 74hc595 chips. On this basic module I can place different types of outputs. In total I provided 4x spi connections on the DE0_Nano soc board. With the existing step motor module together...

Thanks for both pictures with the data of the FT motors. I understand they mention 21.3 ratio. The error is small so this rounding will give little problems with normal use. I'm staying with my results of the measurements. The max measurement error I can have is +- 1 pulse on a total of 1000000 puls...

The first start with this beautiful new board goes very smoothly. The SPI connection has already been tested. It makes every 14 usec a new scan of the 24 inputs and the 24 outputs. The I2C connection with Fischertechnik's TXT-Controller is also tested and works at full speed. The LCD display with 4x...

I think all the readings are almost correct now. Except for the old type FT engine which really does have a reduction of 25, the other types are not integer values. I repeated the measurements with a higher resolution with the hardware counters now having 24 bit. This way they can handle a very larg...

Hello, Helmut, You make great efforts to determine the correct reduction factor of the engine. You try it with only a software solution. The weak point is still the TX or TXT controller. They are not suitable to measure reliable pulses at a higher speed. A second weak point is your mechanical switch...

The old version encoder motor was delivered by Amazon on 22 April 2018. From the Fischertechnik 511933 - TXT Automation Robots. Motor reducion: 25,3906. Picture show the wrong ration of 25,4! Fischertechnik encoder motor FT-135484 Detail of the motor: https://live.staticflickr.com/930/43941681551_1b...

Hey Frans, This is a tricky and fun one problem! 25 25 26 27 -- * -- * -- * -- = 25.390625 deltaRatio=0.000008 => counts=761718.75 countDiff=0.25 9 10 12 16 Maybe it's the last gear combination, at least it looks realizable and it deviates just a quarter of a tic from your measurement result. By th...

Hello Helmut, Thank you very much for the many details. Sorry about my late reaction. Because of the party yesterday, the grandchildren only returned home this afternoon. I've been able to make some new tests to see if there were any measurement errors. I can confirm that my results are still stable...

Hello Frans, Yes I know, this sight is hard to bear, but the patient survived (-; My little surgery - I counted twice - resulted an exact 1/25 ratio, at least with one of mine old type encoders. Helmut I have no reason to doubt your count. I adjusted my measuring setup to connect the FT encoder on ...