This is my last post on this thread for the time being. You are advised to download these PDF files, even if you do not understand them. The technology mentioned is probably two RepRap generations away, but what is important is to realize THIS IS POSSIBLE, and this information has value. Dr. Boyer has alluded to what is rapidly becoming reality... The new paradigm is NATURAL RESOURCES and Iby savecore - Controllers
Okay, thanks I'm gonna drop the UF4005 into my Reprap PCBs. Oh UF4005 !!, you are the Cadillac of diodes...by savecore - Controllers
Okay first on switching resolution and the flyback diodes: I think we should make the physical resolution as high as possible. As we progress, it will be important that we can extrude with high resolutions (first millimeters, then micrometers), and this is partly dependent on the capabilities of the electronics and motors. Regarding emf's suggestion: Can UF4005 be used as a "drop in" replacby savecore - Controllers
Okay, I have confirmed the C30 is basically a hacked GCC . You can download C30 compiler for free, but it will only compile at high optimization for 60 days. After 60 days , you may see your code grow as the compiler defaults back to a lower optimization level. You can download and recompile the compiler (C30) to get around the 60 day limitation, and then you will have a fully functioning highby savecore - Controllers
I have a friend at work who has extensive experience with dsPIC and has used a *nix platform and gcc to compile code for dsPIC. I will post more when I find out details.by savecore - Controllers
8-bit PICs: PIC16F628A: no PWM channels PIC16F648A: no PWM channels PIC16F877A: 2 PWM channels, 10 PWM bits PIC18xxxxx: depends 16-bit dsPICs dsPIC30: can be 0, 4, 6, or 8 motor control channels dsPIC33: either 0, 6, or 8 motor control channelsby savecore - Controllers
Everyone seems to like *thiophene as a semiconducting polymer! High mobility, low voltage polymer transistor Hyewon Kanga, Keon-kook Hana, Jeong-Eun Parka and Hong H. Lee Corresponding Author Contact Information, a, E-mail The Corresponding Author aSchool of Chemical Engineering, Seoul National University, Seoul 151-744, Republic of Korea Received 29 January 2007; revised 3 March 2007; accepby savecore - Controllers
Too big to attach the pdf, here's the important figures from the paper. This is the 0day.by savecore - Controllers
This one is absolutely mind-blowingby savecore - Controllers
Realization of a 5-stage divider circuitry in p-type polymer transistor technology Lackner, C.; Klauk, H.; Gut, W.; Halik, M.; Spilka, R.; Zschieschang, U.; Tanda, A.; Eder, F.; Rohde, D.; Ostermann, T.; Schmid, G. Electron Devices Meeting, 2005. IEDM Technical Digest. IEEE International Volume , Issue , 5-7 Dec. 2005 Page(s): 113 - 116 Digital Object Identifier 10.1109/IEDM.2005.1609281 Abby savecore - Controllers
A polymer transistor circuit using PDHTT Krumm, J.; Eckert, E.; Glauert, W.H.; Ullmann, A.; Fix, W.; Clemens, W. Electron Device Letters, IEEE Volume 25, Issue 6, June 2004 Page(s): 399 - 401 Digital Object Identifier 10.1109/LED.2004.829669 Summary: A digital circuit using polymer thin-film transistors on polyester substrate is presented. The circuit consists of 171 transistors and convertby savecore - Controllers
It seems to me to make sense to upgrade the BOM to PIC16F648A since it is a drop-in replacement, and is only slightly more expensive. Plus it doubles memory, a precious commodity in any embedded system. ---- As for v1.x or 2nd gen technology , I personally prefer the dsPIC, depending on how system requirements begin to manifest themselves in practice. As a counterargument, it may turn out theby savecore - Controllers
Can't answer your question emf, but I can drop statistics on the two chips: (Basically the PIC16F648A has twice the program memory, twice the EEPROM, and approx 14% more RAM). PIC16F628A (existing): Volume Price: $1.29 Architecture: 8bit Program Memory Type: Standard Flash KBytes: 3.5 KWords: 2 Self-write: -- Data EEPROM: 128 bytes RAM: 224 bytes IO: 16 ADC channels: 0 Comparators: 2 Timers/by savecore - Controllers
High-Resolution Inkjet Printing of All-Polymer Transistor Circuits Science 15 December 2000: Vol. 290. no. 5499, pp. 2123 - 2126 DOI: 10.1126/science.290.5499.2123 H. Sirringhaus,1* T. Kawase,1dagger R. H. Friend,1* T. Shimoda,2 M. Inbasekaran,3 W. Wu,3 E. P. Woo3 Direct printing of functional electronic materials may provide a new route to low-cost fabrication of integrated circuits. However,by savecore - Controllers
Conjugated Polymers: Electronic Conductors "the is simply a boundary between two moieties of equal energy -- the infinite conjugation chain on either side -- can migrate in either direction without affecting the energy of the backbone, provided that there is no significant energy barrier to the process. It is this charge carrier mobility that leads to the high conductivity of these polymers.by savecore - Controllers
Okay, I'd like to start a thread about a RepRap transistor. I know the priority / viability of a Reprap transistor is arguable (ie. "If we get PCB's to print using copper, we don't need in-house transistors for awhile", etc). I am not arguing with these points as they are valid ones. Instead, I'd like this thread to be a discussion of the various polymer technology which could be used to impleby savecore - Controllers
I also agree with Zach here. EEPROM survives power down. The idea he mentioned is actually a good layer of abstraction between the computer system settings and the microcontrollers. (That is , store default extruder head parameters and ancillary data in microcontroller EEPROM). How many extruder head IDs are we expecting to see within the current generation of technology? Probably < UCHARby savecore - Reprappers