Alright guys, I need help with my lab report suggestions. The problem is that I made a linear Voltage controlled frequency generator and am getting a 'ramping' effect on my integrator circuit. Do you guys know how i can possibly solve this? The output i should be getting is perfect square and triangle waves. pic related.
Hey /diy/, I'm trying to turn one of my rooms into an infinity room like the one by Yayoi Kusama (see image). So far, I'm thinking of making the mirrors from mylar stretched over wooden frames, and getting a few hundred LED's for the lights. I don't have firsthand experience with either of these things, so I wanted to see if anyone might know of better alternatives.
>>905842 LEDs come in strips now. The easiest thing to do is to buy Ikea LED strips, set them to change colors and run them around the perimeter of the ceiling. As for mirrors, mirrored walls use to be a big thing. You could probably still buy them from any company that specializes in wall coverings. It's going to be expensive though. Any mirror you make will not be of good quality, and the 'infinite effect' is ruined by shitty quality mirrors. If a mirror has even a slight green hue, about 10 reflections in... Comment too long. Click here to view the full text.
>>905858 Thanks for the advice, I'll definitely go with the led strips. That's what I feared with the mirrors though. I already ordered some mylar, so I guess I'll make small test box to see how well it reflects. If it ends up being bad, I guess I'll just have to save for decent mirrors.
New thread, as I let the old one die. Really appreciate the interest the first one got, and I'm glad there are guys on here who know more about these engines than I. This is a pretty slow moving project, so I'll probably have to make one of these every few weeks.
Anyways, >Be me >It's cold outside >Breaker bar and massive 1 3/4" socket acquired >Six 1/2" bolts surrounding 1 3/2" bolt in the center of the crankshaft... Comment too long. Click here to view the full text.
I have an old keyboard Compaq SK-2800C and the key "Ctrl" don't work.
Months ago, the keys "B", "N" and "Space" don't work neither, but when I opened the keyboard, in the membranes I saw a grey line with places where that shit grey are missing: https://upload.wikimedia.org/wikipedia/commons/0/08/Inside_Computer_keyboard.jpg
That places was black instead grey. I fix the problem putting a tight line of foil in that grey lines of circuits into the keyboard to complet the conection,... Comment too long. Click here to view the full text.
>>904696 Yep, just replied to me: Hi there, thank you for your message. We're actually awaiting Stock from our supplier so to keep our stock from running out we've raised the price for several days. Our usual price is £1.95 but we offer discounts for larger orders.
>>904635 >>904636 >>904638 1. TL:DR is supposed to be a summary, not the main point 2. write your post properly before spamming your own thread with bumps 3. Sage 4. A turbo compresses gas, water doesn't compress so no your idea is retarded and I don't even understand what you want to accomplish
>>904411 >Problem is not power outlet. Problem is not motherboard. Problem is not fan. Problem is not processor. Problem is not power supply. Problem is not RAM. problem is not case. how do you know this?
what happened? what did you do? what do you know about computers?
ad some detail before expecting help. it could be anything by your description.
So I finaly found a use for an old HDD-Motor I salvaged once. Now I need to actually drive it. Of course I could buy an ESC to do the job, but at that point I could also just buy a propper RC motor. So I still got the curcuit board of the HDD and found the driver. Its http://www.littlediode.com/datasheets/pdf/Datasheets-L62/L6232B.PDF My aproach would be disconnecting the LIN Vref and/or PWM Vref pin/s while leaving everything else connected and inputting my own speed via either voltage or PWM. Do you see anything obviously wrong with that?
Upon closer Inspection it seems like 6 pins are used for commutation and thereby control the speed. Those 6 pins are connected to a WD61C12-WM which seems to do more than just controling the motor speed. Guess I hit a dead end here. Any easier ways to drive an HDD motor?
>>902044 >The commutation sequence is provided by the user via six inputs In other words, you would need a microcontroller to cycle the IN pins to make the motor spin.
Something like the following does the commutation sequence automatically: http://www.ti.com/lit/ds/symlink/drv11873.pdf
There are Chinese boards based on that or similar parts: - Control by pot: http://www.ebay.com/itm/5V-12V-DC-Brushless-Motor-Driver-Board-Controller-for-Hard-drive-motor-3-4-wire-/181924211939 -... Comment too long. Click here to view the full text.
After poking around a little bit a few users on other sites told me that /diy/ was a good spot to have my first try at a pc build reviewed.
So here goes.
I gave myself a budget of $1500 for the actual build to get it going.
I came in just under that goal, and decided to add a backup storage and some new speakers, as my old speakers are simple stock speakers that came with my last pre-built purchase. This brought me up to slightly above my $1500 budget, but I don't mind that at all.
What I'm really looking for is a critique on the parts.
Is... Comment too long. Click here to view the full text.
>>905049 >After poking around a little bit a few users on other sites told me that /diy/ was a good spot to have my first try at a pc build reviewed.
While true, there will be one guy who tells you to go to /g/, he is in every single one of these threads. Ill preemptively point him to the >>>/g/ sticky that says >/g/ is NOT your personal tech support team or personal consumer review site.
Also give... Comment too long. Click here to view the full text.
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