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Ok. The turbine for the apartment in my house is coming together.
(Back Story: I am converting the basement in my home to a DC only residence. I will try my hardest to NOT invert DC to AC for any reason. I will try to use pwm'd DC for air-conditioning. And DC lighting, computer, television...
Fujitsu now makes a "mini-split" a/c unit for home/office use. The unit converts to dc at the mains then uses the DC power for compressor and controls. They state stronger, faster operation with lower power usage. The compressor has a sharper rise to efficiency when using DC than AC...
Ok. I just canceled my order for a wind turbine. I just cant spend a $1000 with out spending $250 to see if I can do it myself.
I have no problem paying $250 for an education. With everything I have to pull from, I am confident I will create something....educational. ;)
Any ideas or tips...
In order to cut down on wire-length, I am designing the battery bank in the center of the "house" allowing shortest runs.
Emergency AC-DC converter triggered by uC controlled battery monitor. This will allow me to keep logs of when the batteries hit 55% and what was running when that...
I would really be interested in household items using I could run DC only. My parents have an old blender that has a DC motor and a huge transformer inside. The motor is an 18vDC motor which I ran successfully after removing the transformer. Speed controls and all. This was made in the 1970s...
I am starting an experimental power project for my home with a few cheap solar cells and a small wind turbine and a few deep-cycle batteries.
One of the losses I would like to do away with is DC to AC inverters. I already have a ton of wall-wart powered devices so it makes no sense to me to...
Hi everyone, me again!
I have been designing a 4 bit hybrid computer as some users here allready know. Looking back at the old 4 bit computer, thank god i did not make it, it would have been a waste of components. It had no functionality, no usefulness, could not be used for proper programs...
Ok, its done!
Allthough its missing a tape drive i cant be bothered at the very moment but i will design one for those who want to use my design. Notice that the instructions and decoding is hardwired!
http://www.mediafire.com/?jjgdnwa0t3y
This is a zip with all the schematics. The...
Ok the computer is really starting to take shape. So, the schematics for the ALU ARE DONE!!! and will upload them in a pdf. The accumulator is also done but the main processor...well....lets just say i needs to be checked first.
If someone could check it for me the just send me a message by...
I have completly redesigned the ALU after discovering i need decoupling capacators and open collectors. I am using the Eagle software to draw the schematics and convert to PCB, man....I have never used such a brilliant program for auto-routing. This thing can route ANYTHING!!!
Well I have finished the ALU design and just need to implement this to a PCB. Instead of the traditional "everything on one board" I have designed mini boards that fit in a mini shelf (i mean really small). This way its easier to find a problem and fix.
Design:
Voltage Peak detector
1. Vcc = 12v.
2. Choose VCQ1 output, = 9v.
3. Choose VBQ1 = 8v.
4. VEQ1 = 7.3v.
5. choose RCQ1 = 470 ohms. (to drive a LED output)
6. IRCQ1 = (Vcc - VCQ1) / RCQ1 = ~ 6.38 mA.
7. RE is a split resistance, between the emitter of Q1 and Q2.
RE = ( REQ1 + REQ2) =...
LEDs, 555s, PWM, Flashers, and Light Chasers
by Bill Marsden, courtesy of http://forum.allaboutcircuits.com/
I'm moving this article to blog format to allow me greater flexability in editing. Please, do not comment in the blog, if you do I will delete it. If you want to leave a comment do it...
Page 3.
If this works properly I will post this particular design page in the electronics general category
for people to look at and suggest design corrections, for beginners to learn from.
This can be scrutinized by people more knowledgeable to give good design suggestions so everyone starting...
PAGE 3 REDESIGN working from input to output stage.
At this point I'm running into clipping problems when I add a fourth stage,
I check the DC bias for each stage and the VC. is around the 1/2 VCC area.
I check the Av. each individually, and I get the gains required, but coupling them is...
Ok Now I've been working on the next stage, and realizing that the Zin is dropping instead of increasing, as I try to get as much gain as possible.
Probably if I were to use bypass caps. It would solve most of this but I'm trying to not have to use bypass caps. if I don't have to.
My other...
My first project with an ATMEL AVR microcontroller (ATMega8). I use the DS1820 digital temperature sensor.
http://www.youtube.com/watch?v=ToWDsdDHvas
As a hobbiest (NON engineer), I am designing a small signal amp in the most proper way I know how through my methods of calculations, and imperical breadboarding and measurements and tests, using a calculator breadboard and components, oscilloscope, audio signal generator,
resistor sub box...
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This is a tutorial on basic transistor circuit design for multiple staging.
This is a AC current sensor, based on a "radioshack" 12.6V. 1.2A, power transformer, used as the detector.
Prepararation:
Begin by taking an ordinary 60W. lamp. Wrap its cord about 4 complete turns longitudenal around...
