What about these ideas: 1. Feed LCD back light (pin15 of LCD) using PC power +12V output? Resies resistor is needed to limit current. 2. or, use separate wired +5V output (maybe with some small resistor) line for LCD back light feeding. This means, that LCD back light is completely off until PSU and its 5V and 12V lines are online. 3. Feed LCD back light using suitable high valued resistorby mikropehmo - RAMPS Electronics
And if you separate Z motor enable to one of the last free A pins, you could disable Z motors, because during printing Z is the only one that even can be disabled (because stepper hold its main step positions very well - micro stepping mode is not used if threaded rod is used). But that is not necessary, only power saving is reason for this. Has anyone tested, could it be possible to combine Zby mikropehmo - Controllers
Hi, I have fried one arduino just similar way. I soldered broken USB CPU of and replaced it with separate USB to TTL converter board buyed from eBay for about $3 Uou can try to replace that broken bpart with awire but I quess that the USB processor is damaged anyway. But I think I do know what happened: I live in European country, where mains live and neutral swapping means nothing. I thinby mikropehmo - RAMPS Electronics
Yes, definitely hope so. Ready made or kit, not sure about that. It is expensive to make assembled PCBs to find out, that nobody is willind to buy them. But this might be the tinyest arduino+ramps type combination ever made. And definitely not a even "a clone". Some kind of "relative" might be correct word of calling it. Anyway I'll continue using this PCB size format in future for many otherby mikropehmo - Controllers
Hi, Thanks for info. I have used this picture sharing system only once before, sorry. On message editor area there seems to be direct buttons for adding links. If I click my previous link, it will link to my Picasaweb album correctly. Maybe just because I were logged into Google gmail at the same time. Confusing... But here it is all once more, is it better now: Picture album: album Well, dby mikropehmo - Controllers
Yes, That is right. Definitely it was not original Pololu. Thanks for making it clear for everybody. One example again that original products on the market are mostly good guality and too many clones may be scap. And that scap is for nothing: price difference between 16V cap and 35 or 50V cap is just some cents! Luckily, in my case, that scap were repairable quite easily, but sadly for otherby mikropehmo - Controllers
Traumflug Wrote: ------------------------------------------------------- > volts. It's true more current increases tourque > and more voltage is needed only if you can't reach > sufficient current. Yes, that is basic knowledge in not running static world, which is not a problem for anybody. But to know the real chopper controlled current of fast running motor, you should measure theby mikropehmo - Controllers
> "catch on fire the other day," I have fired all of my ready made Pololu steppers because of one simple reason: All pololus that I have buyed from the web marketplaces have equipped with 16 volt capacitors in stepper power input (biggest capacitors on board, possible 4.7uF, I quess). They burst into flame at about 19-20 volt. If using 12V PSU it still CAN be possible to have spikes aby mikropehmo - Controllers
Hi, I have done some set of ready PCBs for Reprap or robotics use. Schematics should be connector pinout and function compatible with Arduino - think so at least... My CPU is Atmega328. Size of PCB layout is 36*32 mm! That tiny PCB contain all basic Arduino function. USB is included underside on PCB usin FTDI chip or it can be made using commercial CP2102 module, which is cheaper than FTDI chiby mikropehmo - Controllers
Item: This is panelized 10*10 cm sized PCB which holds ALL PCB layouts (exept Atmega2560) needeed to build up Reprap machine. Item description: Sold as fixed panel. Individual PCB parts need to be separated. That is possible easily using saw or knife. 1. RAMPS PCB is based on version 1.31, but I have added holes for heater indicator LEDs and filter capacitors just before RAMPS (SMD) version 1.4by mikropehmo - For Sale
Good points, NoodMan .. Proteus have totally different mouse clicking principles than any other Windows based CAD, but when you get familiar with its logic, no one other CAD uses as less mouse clicks and cursor movements between menus for normal working tasks, thanks to its ability to "know" what your try to do. At the very begining, to my eyes and hands, Eagle had totally horable UI, but nowby mikropehmo - Next Wave Electronics Working Group
Traumflug Wrote: > Too bad you stick to closed source layout > software, but I hope Gen7 can improve a bit > from this anyways. You are right, I may be "stuck" on closed source (normally I use the most productivity CAD software I ever know, named Proteus) ;-) This development I have made for practicing of Eagle Light software. Light version restrictions are not problem, all routesby mikropehmo - Next Wave Electronics Working Group
Thanks for your rapid response! I have made some track routing to consider thinking that this tiny PCb idea might be useful for real life. Traumflug Wrote: > Myke Predko.... How is the programming interface of that? I see > loops there, which will be interrupted up to > 30'000 times a second. Does this work out with a 2 > wire interface? I have not tested this with any reprap codeby mikropehmo - Next Wave Electronics Working Group
Hi, Thanks for all developers, great work! I am very new in reprap and I am thinking similar details on my head. I post this message to this topic, because I don't like to open new with same basic question. I have now Generation7 schematics and PCB layout under EAGLE CAD. My PCB layout size is reduced to 10*10 cm and it is still makeable using toner transfer or photoresistive. Also millingby mikropehmo - Next Wave Electronics Working Group
Without knowing anything from parallel world and work going on, about month or two ago I have edited RAMPS version 1.3 little bit forward. I like to have LEDS, so I added them :-) Width of PCB is reduced to 100 mm to suit for some professional PCB factory limits to keep price down. Also tracks are wider, all stepper connectors are aligned and doubled (you can connect LEDs to stepper signals to sby mikropehmo - For Sale