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. . . . [designed by Peter Jakab]
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) . . . [Name of Designer is not included]
Linear Technology Magazine Circuit Collection Volume iii - AN67 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. . . [Linear
Technology]
Linear Technology Magazine Circuit Collection Volume V - AN87 Application Note 87 is the fifth in a series that excerpts useful circuits from
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, . . . [Linear Technology]
Logging Photodiode JFET Amplifier with 1pA Input
Bias Current - The 1pA input bias current contributes
only 0. 4fA/rtHz of current noise or 0. 4nV/rtHz voltage noise with a 1Mohm source impedance. Photodiode
current is converted to a voltage by the first op Amp and D1 and Amplified by the first, second and third
logarithmic compression Amplifiers. . . . [Linear Technology App Note - , Mar 22, 2010]
Long Transmission Lines & Data Signal Quality - Application Note. . . [National Semiconductor]
Low cost gyro / accelerometer combo sensor - In building a balancing robot you need a gyrOscope unit and an accelerometer unit in order
to get it to balance. But I also wanted it to be reasonably low in cost with high performance and easily
interfaced to a MCU. Some of the other solutions are prohibitively expensive, even if they may work well.
Also the solution I had in mind had to be fairly small and use up little space and use up little power too. .
. [ by Earl W. Bollinger]
Low cost , 16-Bit, 250
kSPS, 8-Channel, Isolated Data Acquisition System -
System Performance Figure 4 shows a plot of the ADC code occurrences for 10, 000 samples (1 sec at 1 kSPS)
when CH0 through CH7 are shorted to GND on the terminal block of the evaluation board. Note that 95% of the
codes fall within 4 LSBs, and the peak-to-peak spread is approximately 7 LSBs. The sampling rate 250 kSPS is
controlled by the system demonstration platform ( EVAL-SDP-CB1Z ), and the digital signal processing
including the signal windowing and FFT is calculated on a PC by the CN-0254 evaluation software. . . [Analog
Devices-Circuits from the Lab]
Low Power, Long Range,
ISM Wireless Measuring Node - This simplifies the
software but necessitates the use of an extra diode and resistor to separate incoming and outgoing data
streams. . . [Analog Devices-Circuits from the Lab]
Low-cost Laser Data Links - Quit shining laser pointers at people and use them for something useful. . . . [Green Bay
Professional Packet Radio]
LTC1099 Enables PC-Based Data Acquisition Board to Operate DC-20kHz - AN34 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) . . . [Linear Technology]
<<<< Previous PAGE Next
>>>> |