Electronics
Get flash to fully experience Pearltrees
Welcome to the wonderful world of PCB creation! We've used a few software packages over the years (namely Protel DXP) and have found Eagle Layout Editor from CadSoft to be very easy to use, very cost effective, and very powerful. Eagle is free!
Lecture 8 - Eagle Schematics
Decent PCB's on the cheap. Version .2f (original 2003) Dal Wheeler Questions / Comments Email Me! New!
PCB's on the cheap
By: The codex: http://www.thecodex.com/ Use a light beam to listen in to anything, anywhere, any time... Breaking and entering to plant a listening device is one way to "bug" a room.
Laser listening
ShmooCon was, once again, a fantastic experience this year. One of many highlights of this year's event for me was hacking on some radio devices with Travis Goodspeed in the hotel bar for hours on end. This included playing with the IM-Me that he brought.
a $16 pocket spectrum analyzer
Ο αναλυτής αυτός είναι , ένα ευαίσθητο όργανο , στις μεταβολές συχνότητας και πλάτους, ενός ακουστικού σήματος.
mini audio analyzer
Audio circuits
The following links to circuit diagrams and building projects I have found from other web sites.
Why is it important to use this device? Audio signals as music or speech have big dynamic ranges. There are silent and loud sections.
CZ Compressor/Limiter/Clipper for FM broadcasting
This audio limiter circuit is easy to build, works with BA741 8pins or 4pins so pay attention and uses a symmetrical power supply.
Audio limiter circuit schematic
An Excellent Audio Clipper Here are two versions of the best clipper circuit I could find in a short search of the radio handbooks I have on my, somewhat limited, book shelf.
clipper
Single Op-Amp Twin-T Band-Pass and Notch Filter | Simple Circuit Diagram
This is a Single Op-Amp Twin-T Band-Pass and Notch Filter circuit. This circuit uses the twin-T topology which requires one or two op amps and three resistors and three capacitors.Robotics
A new multi-function power supply unit for my Embedded Lab
One important parameter in embedded system designing is power consumption.The SmaTrig is a compact, AVR microcontroller based multi-function flash or camera trigger. Its 15 modes of operation make it come in handy in many situations.