DiscoverCircuits.com, has 30,000+ electronic
circuits, cross-referenced
into 500+ categories. We have searched the web to help you
find quick design ideas.
We make every effort to link to material posted by the designer.
Please let us if you would like us to link to or post your
design.
LCD thermometer 1 - Build your own temperature meter for fun.
This project uses the Microchip TC77 digital temperature sensor, a
PIC16F871 microcontroller and a 7-segment 3˝ digit LCD. You can study the
source code on how to drive an LCD display….. [Peter Jakab, Electrical
Engineer, Engineer of Informatics]
Lie Detector - The circuit diagram of the Lie Detector is shown
above. It consists of three transistors (TR1 to TR3), a capacitor (C1),
two lights or LEDs (L1 & L2), five resistors (R1 to R5), and a variable
resistor (VR1). This circuit is based on the fact that a person's
skin resistance changes when they sweat (sweating because they're
lying).....(electronic circuit added 7/03)
Linear Technology Magazine Circuit Collection Volume iii - AN67
Linear Technology Application Note 67 is a collection of circuits for data
conversion, interface and signal processing from the first five years of
Linear Technology. This application note includes circuits such as
fast video multiplexers for high speed video, an ultraselective bandpass
filter circuit.....(app note added 2/06)
Linear Technology Magazine Circuit Collection Volume V - AN87 Linear
Technology Application Note 87 is the fifth in a series that excerpts useful
circuits from Linear Technology magazine. Data conversion, interface and signal
conditioning circuits from issue VI:1 (February 1996) through issue VIII:4
(November 1998) are featured. Like its predecessor, AN67, this Application Note
includes circuits for high speed video,.....(app note added 2/06)
LTC1099 Enables PC-Based Data Acquisition Board to Operate DC-20kHz -
AN34 Linear Technology A complete design for a data acquisition card for the IBM
PC is detailed in this application note. Additionally, C language code is provided
to allow sampling of data at speed of more than 20kHz. The speed limitation is
strictly based on the execution speed of the "C" data acquisition loop. A "Turbo"
XT.....(app note add 1/06)
Measurement & Control Circuit Collection - AN45 Linear Technology A
variety of measurement and control circuits are included in this application note.
Eighteen circuits, including ultra low noise amplifiers, current sources,
transducer signal conditioners, oscillators, data converters and power supplies
are presented. The circuits emphasize precision specifications with relatively
simple configurations. (app note added 2/06)
Mini Logger Vs 1.0 - Build your own a personal data logger for recording
analog signal. The MiniLOGGER provides 8-channel analog input(-99mV to +999mV),
1-channel pulse input, battery backup 256kB SRAM, Real-time Clock, and RS232C.
Start/Stop recording can be made by MANUAL switch or preprogrammed Start/Stop
Time. The format of uploading data is ASCII format, suitable for importing and
graphing by Excel or any Scientific Plot Program. Exemplary circuit used for
measuring Insolation and Air Temperature vs. Time is included..... [Wichit
Sirichote, kswichit@kmitl.ac.th]
MiniLOGGER V1.0 - Build your own a personal data logger for recording
analog signal. The MiniLOGGER provides 8-channel analog input(-99mV to
+999mV),.....(electronic circuit added 05/06/07)
