Facebook
Google
GitHub
LinkedinBlogs
I didn't actually list the link after all of that.
If it's not allowed I suspect it will get the <SNIP>. BTW, a local vasectomy clinic is running a billboard campaign featuring just two words - snip, snip. (Ouch).
<SNIP>
that's it! :)
Making the PCB
With reference to this article:
Projects from A-Z. Part 1.
To transfer the boards graphic to a PCB, I'm using the UV method. I bought some UV-LEDs on Ebay, and made a little circuit that controls them. (On request, I will make an artice of my exposure box.) This is my...
Talent does what it can; genius does what it must.
Edward G. Bulwer-Lytton
I have a Wordpress blog which I use to show folks my electronics cartoons, as well as put "word of the day" (strange, rare but interesting words) and other posts.
It is a non-commercial blog; it is a simple but nice way for me to display my doodlings.
I think (hope) this does not contravene...
Some of you may have seen my thread,
http://forum.allaboutcircuits.com/showthread.php?t=56756
As I said, I know very little about cars, so I posted this thread to see what people thought of the idea. At first it did not seem to be very well-received, due mainly to the fact that starter motors...
The heart of this project is the motor that drives the bicycle. Due to all the weight it would have to move, I needed a powerful 12 volt motor capable of producing a lot of torque. My first idea was to use a motor from a treadmill, but that hope quickly faded away--treadmill motors generally use...
Well, I took my 18-speed mountain bicycle out of the storage shed this spring and realized there was a lot to be desired--The chain was somewhat stiff, the rear brake was completely frozen, and the chain derailer was in terrible condition, along with some other minor issues. When I was thinking...
Finding the project.
This is part one of two articles.
So how do I start a new project, and how do I decide what to build?
Whenever I come up with an idea, I write it down. I have a long list of "projects to-do". It reaches from a simple LED flasher in the bushes, to a more advanced circuit...
I am currently building an executive toy that is a small 1970's style looking computer (with the exception of the 2 line 16 character display).
The computer has 2K ROM, 8K RAM, hopefully a paper tape reader and several IO ports. Interestingly this computer is easy to adapt and therefore i...
Hello everyone! This is my first blog entry here on All About Circuits. I'll briefly introduce myself (even though I've been active here since Dec 2010).
I'm currently a college juinor at Rensselaer Polytechnic Institute. I'm majoring in Electrical Engineering and I will finally be taking...
An interesting circuit once appeared under this thread:
http://forum.allaboutcircuits.com/showthread.php?t=43005
and I thought I would show how I solved it.
Using just 3 node voltage method equations.
The original problem said: "Find the resistance between points A and B if R=81 Ω...
Hey everyone,
I know, im that bad! This is my FIFTH CPU design. This time, im keeping to kiss (keep it simple stupid). I have spent time designing this one internal bus four bit computer. It has a small number of instructions as listed below:
Add(ab):
Adds the two registers A and B together...
Hi,
This is a continuation of the original squarewave to triangle wave in the series of designing a PWM circuit using all discreet components
http://www.youtube.com/v/KnFV7qTVJB0?hl=en&fs=1
This video shows how the amplified triangle wave is fed into the volt. level detector circuit...
It is easier to explain on the video,
http://www.youtube.com/embed/PmplS1mcFqI
than to write it all out.
The basic idea of designing the inverter is 'sinusoidal pulse width modulation'.
One can get an idea from here.
I have used HEF4752 in this project. It is a 3phase SPWM pulse generator chip. I bought it for 2000 INR. This IC can drive six mosfets/igbts with its complemetary SPWM pulses
This is a quick design of a light tracking circuit,
The video of it:
And
Here is the schematic of it:
it is a test circuit running a 5v. motor, when the light hits the left CDS cell the motor spins leftward, and the right CDS cell causes the motor to spin rightward, when no direct light...
PWM motor speed control, with torque control feedback.
Q6 is the mosfet motor driver.
Q5 delivers positive voltage to the gate of Q6, to cause Q6 to conduct harder so as to drive the motor speed faster.
Q4 and Q5 are the transistors that make up an 'Square Wave Oscillator',
The design of...
Title says everything. There is schematics I lost that can make NO switch to work as NC
Now replacing the two 1.8K ohm resistors, for a single pot. of 5K ohms, and using a current limiting resistor at each base of 100 ohms,
I now have a manual control signal into the base of these PNP transistors to work the circuit.
Built the cuircuit and I get a almost a full range from 0% -...
Designing a PWM unit with manual / electronic speed control.
Hi,
I have been doing some reading up on how 'pulse width modulation' works, and now I feel like I am ready to design my own version of it using all discrete components.
Step 1. Design a 'astable multivibrator circuit' for...
