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FAN5068 Components calculations & simulation tools/ AN-6006 -
Fairchild Application Notes / (app note added 6/06) |
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Fast-settling picoammeter circuit handles wide voltage range -
14-Sep-06 Issue of EDN Versatile circuit converts picoamperes to
millivolts.... [Design Idea by Rob Whitehouse, Analog Devices, Wilmington,
MA; Edited by Brad Thompson and Fran Granville] |
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Femto Capacitance Meter - This meter measures into the low femtofarad
area. Measuring in the femto area allows the smallest capacitors to be
measured with precision. Such capacitors are commonly.... |
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Field Strength Indicator-Analog only - (circuit schematic added
6/07) |
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Field Strength Meter - This is a wide band signal strength meter
circuit which responds to small changes in RF energy, designed to be used
for the VHF spectrum and will respond to AM or FM modulation or just a plain
carrier wave….. [Andy Collison's circuit] |
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Field Strength Meter for 2.4 Ghz Wireless LAN - What can you use
to test how effective your antennas are for 2.4 Ghz? Which antenna has the
best gain or, how do you know that there is any 2.4Ghz RF transmitted? Here
are the details on how to build a general purpose 2.4Ghz Radio Frequency
Field Strength Meter..... [Circuit designed by John Samnin] |
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Field strength meter for the 137 kHz band - (diagram added 05/07)
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Field Strength Meter MkI - This Field Strength Meter has been specially
designed for our FM bugs. It is capable of detecting very low power transmitters and
will assist enormously in peaking many of our FM transmitters that have a coil in the
output stage that can be adjusted for optimum output....(schematic added 08/08/08)
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Field Strength Meter MkII - This Field Strength Meter has been specially
designed for our FM bugs. It is capable of detecting very low power transmitters and
will assist enormously in peaking many of our FM transmitters that have a coil in the
output stage that can be adjusted for optimum output....(schematic added 08/08/08)
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Field-strength meter - I saw this circuit in an old issue of "73 Radio
Electronics". I built it, but it didn't work well, so I changed a few components to
get better sensitivity…..(design idea circuit added 09/08) |
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First Response Monitor - Schematic only, no circuit description |
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Fixed Voltage Power Supply - The fixed voltage power supply is useful in
applications where an adjustable output is not required. This supply is simple,
but very flexable as the voltage it outputs is dependant only on the regulator and
transformer you choose. The maximum output current is 1.5A.... [Aaron Cake] |
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Four Channel Digital Voltmeter with Display & Keyboard - Microchip
Application Note Published 27-May-05 (app note added 2/06) |
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Four Channel Oscilloscope Adapter - will introduce the adapter to see
the wavefrom of four kinds of the signals at the same time with the oscilloscope on
these pages. At the classy oscilloscope, it is equipped with the function to see more
than one signal at the same time. The one which I am having can see only the one
signal. Therefore, I made the adapter to see four kinds of the signals at the same
time....(circuit / schematic design added 07/08/09) |
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Fox-Hound Wire tracer - The "Fox" and "Hound," made by Triplett Corporation
(www.triplett.com), are a transmitter and receiver for tracing telephone(and others)
wires through walls. You connect the transmitter to the wire, and the receiver helps
you trace the wire from several inches distance away. Triplett doesn't say much about
how they work, but th Fox and Hound apparently use inductive coupling of a
low-frequency signal, maybe around 50 to 100KHz.…. [Tony van Roon's circuit] |
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Free program designs and analyzes passive and active filters - 7-Jul-05
Issue of EDN Filter design simplified with Matlab-focused program.... [Design
Idea by James Squire, Virginia Military Institute, Lexington, VA; Edited by Brad
Thompson and Fran Granville] |
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Frequency & Capacitance Meter - ASCII format (added 4/02) |
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Frequency Comparator Draws 8 µA - 03/03/97 EDN-Design Ideas.... EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for new
link. |
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Frequency comparator has status output - 26-Dec-02 Issue of EDN The
original application for the circuit in Figure 1 was to check the number of
revolutions of an engine with only one LED as an indicator. The measurement of the
number of revolutions usually involves sensors with a frequency output proportional to
the number of revolutions. The circuit compares the frequency output of such a sensor
with a lower and upper limit and gives a visual result, usi.... [Design Idea by
Susanne Nell, Breitenfurt, Austria] |
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Frequency counter - This project explain a very powerful frequency counter
which has many useful software functions. The software can add or subtract 3 different
IF frequencies (±455 kHz ,±10.7 MHz and ±21.4 MHz). You have also two level of
resolutions, 1kHz and 100Hz....(diagram added 05/07) |
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Frequency Measurements using PC - (diagram added 8/03) |
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Frequency Meter & Pulse Generator - (schematic / circuit added 6/07)
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Frequency source feeds entire lab - 23-Jan-03 Issue of EDN Plumbing a
laboratory with a standard frequency makes a lot of sense if the lab uses multiple
frequency counters, spectrum analyzers, and other frequency-dependent test equipment.
Rather than spending time keeping all of the instruments' oscillators in calibration
or buying expensive, high-precision oscillators, you can use the circuit in Figure 1
to distribute a single calibrated frequency sou.... [Design Idea by Mitchell Lee,
Linear Technology Corp, Milpitas, CA] |
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Frequency Window Comparator has hysteresis - 11/07/96 EDN-Design
Ideas....The frequency comparator in Figure 1 uses two VCOs. C1, R1+R2, and the
voltage at pin 9 determine the frequency of IC1 (900 Hz]. C3, R5+R6, and the voltage
at pin 9 determine the frequency of IC2 (1580 Hz]. If fIN is lower than 900 Hz, then
the output P2 of phase-comparator 2 in IC1 is high and drives.... [Design Idea by W
Dijkstra, Consultant, Waalre, The Netherlands] |
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Frequently Asked Questions FAQs Analog Devices Energy ADE Products - AN-639
Analog Devices Application Notes....[App Note] |
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FSM Field Strength Meter - This is a wide band signal strength meter circuit
which responds to small changes in RF energy, designed to be used for the VHF spectrum
and will respond to AM or FM modulation or just a plain carrier wave… [Andy Collison] |
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Full Featured Transistor Tester - Just the thing to check the transistors
for any project.... |
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Full wave Rectifier - Using a LF412 high speed dual op amp, this circuit
will rectify any signal up to about 100KHz with a minimum amplitude of about 50mv peak
to peak. …. [Designed by David A. Johnson] |
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Function Generator - A function generator using the ICL8038 integrated
circuit. Is has four ranges and capable of sine, square and triangle
outputs…..(electronic design added 6/07) |
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Fundamentals of RF & Microwave Power Measurements - Aligent App Note
(app note added 6/07) |
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Fundamentals of Signal Analysis - Aligent App Note (app note added
6/07) |
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Gali Test Fixture Instructions - AN-60-013 Application Note
MiniCircuits.com (app note added 08/08/08) |
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Gali-TBF Test Fixture Instructions - AN-60-015 Application Note
MiniCircuits.com (app note added 08/08/08) |
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Game Show Indicator Lights (Who's First) - This circuit turns on a light
corresponding to the first of several buttons pressed in a "Who's First" game. Three
stages are shown but the circuit can be extended to include any number of buttons and
lamps. Three SCRs (silicon controlled rectifiers) are connected with a common cathode
resistor (50 ohm) so that when any SCR conducts, the voltage on the cathodes will rise
about 7 volts above the voltage at the junction of the 51K and 1K ohm resistors and
prevent triggering of a second SCR. When all lamps are off, and a button is pressed,
the corresponding SCR is triggered due to.... |
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Gas & Water Metering with the PIC16F91X Family - Microchip Application Note
Published 20-Jan-06....[App Note] |
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Generator 500kHz...110MHz 1 - .... |
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Generator 500kHz...110MHz 2 - .... |
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Get nine tips for making better resistance measurements - Agilent
Application Note....[App Note] |
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Grid-dip-meters + xtal Tester - This is a simple XTal tester circuit. T1 and
XTal have formed an oscillator. C1 and C2 are voltage divider for oscillator. if the
XTal is safe, the oscillator will work well and its output voltage will be rectified
by C3, C4, D1 and D2, then T2 will run and LED will light. The circuit is suitable to
test 100KHz, 30MHz Xtal. (electronic design added 6/07) |
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Grundig RV 11 VTVM schematic - (added 07/07/07) |
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GSM Base Station Measurements - Aligent Application Note (app note
added 04/05/06) |
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Guide to the Design of Current Feedback Control/ AN-4109 - Fairchild
Application Notes / (app note added 6/06) |
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