Jonas
Eurobricks Citizen-
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About Jonas
- Birthday 01/25/1957
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What is favorite LEGO theme? (we need this info to prevent spam)
Technic
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Website URL
http://www.brickshelf.com/cgi-bin/gallery.cgi?m=tacvud
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Gender
Male
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Location
Czechia
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Country
Czechia
Recent Profile Visitors
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Sinclair ZX Spectrum (1982) and LEGO Interface A (1986): #9750 controlled by a Speccy
Jonas replied to Toastie's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
If I remember well, one of the key circuits was damaged during my HW experiments in 1990s. I switched to PCs in my professional work and to embedded systems (like Arduino) in my hobby. See here.- 10 replies
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- lego technic control
- 8bitisbetter
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Sinclair ZX Spectrum (1982) and LEGO Interface A (1986): #9750 controlled by a Speccy
Jonas replied to Toastie's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi Thorsten, thanks for your warm response. And yes, it was so nice times with old good Speccys, I had built my interface in 1988. I have no schematic anymore, but I still remember that I used integrated stereo amplifiers to make small-footprint H-bridge drivers for motors. My programs were written mainly in Basic but the time-critical parts, such as controlling motors with opto-sensor feedback or joystick control, were coded in Z80 assembler. BTW, I had built also another interface with 8-bit AD and DA converters and used it for my experiments in those early times of speech recognition. A large part of my dissertation in 1980s was made on my Spectrum. Unfortunately, the computer does not function anymore. But it still has a place of honor in my private exhibition.- 10 replies
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- lego technic control
- 8bitisbetter
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Sinclair ZX Spectrum (1982) and LEGO Interface A (1986): #9750 controlled by a Speccy
Jonas replied to Toastie's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
A sweet topic for us, older Technic and computer fans! It reminds me my attempts to link the Lego and ZX Spectrum worlds back in late 1980s. I was lucky to have had the Spectrum+ version whose larger case allowed me to build in a 3-port parallel interface (8255) and additional memory banks. I have also designed and built an interface for controlling LEGO models (up to 4 motors, 8 LEDs and 4 photodiodes used for feedback control). Here are several pictures: It allowed me to control various manipulators ... ... and also vehicles (via a joystick connected to the parallel interface as well). Some other pictures can be seen on my Brickshelf.- 10 replies
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- lego technic control
- 8bitisbetter
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General Part Discussion
Jonas replied to Polo-Freak's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
If only the TLG would come with a Technic-compatible nut. The only available brick-type nut is not well suited for Technic constructions.- 4578 replies
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- Bionicle Technic
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Akiyuki Mangle rack clock
Jonas replied to GerritvdG's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Super! It is nice to see that somebody was able to recreate this Akiyuki's masterpiece. I would appreciate some more detailed photos. -
[TC23] Great Ball Contraption Contest - Voting Topic
Jonas replied to Milan's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
1: 10 3: 6 5: 4 2: 3 6: 2 4: 1 -
Pneumatic Automation - What's out there?
Jonas replied to DrJB's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
For me, the most sophisticated pneumatic contraption is Pneumatic Ball Factory by Quanix. He made at least 3 versions. Here is the last one: -
[TC23] Ferris Wheel GBC
Jonas replied to Berthil's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
This looks like a very interesting and - at the same time - space-friendly GBC module. -
Pybricks Q&A
Jonas replied to Pybricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Thank you David for this useful hint. Also thanks to Jos for his one. -
Pybricks Q&A
Jonas replied to Pybricks's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hello all, I have a question on using memory in EV3. I want to run a program in two modes. In the first one, I am going to do some calibration based on measurements from sensors and computation, and after that to store the computed values. This should be done only occasionally, especially in case when the working environment changes. In the main mode, the program should retrieve those stored values and use them for its repeated runs. What is the best way to do it in Pybricks? -
[MOC] 8 Legged Walker
Jonas replied to ord's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
This is a very clever design. Thank you very much for providing the sketch of the main linkage and the stud.io file. I have just build a pair of legs to learn how it works. I admire your creative solution to these three 2.5-stud-long arms. -
T-Bot (3axis gantry)
Jonas replied to Mr Jos's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
I like the new type of gripper. It seems to be well suited for small elements. -
[MINDSTORMS] Full automatic, interactive "Logistics center"
Jonas replied to Mr Jos's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
This is a real masterpiece of Lego construction and programming. -
Technic Pin Sorter XL
Jonas replied to Mr Jos's topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Again, you have created a wonderful machine. A nice inspiration for some of us, including me.