Measurement
circuits  |
|
10 LED VU meter
LM3914, LM353 |
|
3 phase-3 wire Sequence Indicator |
| 4 channel
adapter for the oscilloscope |
|
4 channel,
car digital thermometer ICL7107 |
| Accelerometer
ADXL250 |
|
AC Current Probe
for Oscilloscope Use |
| Angle measurment coder/decoder
Gray code circuit |
| Audio test equipment |
| Capacitance meter
the Femto capacitance meter measures in the low femtofarad area having a resolution of 10 femtofarads (fF). The meter has six ranges allowing a maximum
measuremenet is 4 microfarads, ICL7106 |
|
Capacitance meter
Digital Capacitance Meter, microcntroller AT90S2313 |
| Compteur électronique
réalisation d'un gestionnaire d'énergie à microcontroleur 68HC811E2 utilisant la
liaison téléinformation du compteur EDF, en Français |
| Current
meter used to measure the current from a solar panel. It has very low power loss for currents in the 0-10A range. It also works as a general purpose DC
current meter |
| DC voltmeter with high input impedance |
|
Digitale voltmeter met
de 74C928
pdf file, in Dutch |
|
Digital Volt and Ampere meter |
|
Distortion measurement circuit |
| DVM
with the ICL7106 This application note describes a technique for
auto-ranging a battery operated DVM suitable for panel meter applications. Also,
circuit ideas will be presented for conductance and resistance measurement,
ICL7106,
pdf file |
|
Electronic
Stethoscope |
| EMF
probe with meter to locate stray electromagnetic (EM) fields |
|
ESR Meter
Fully-built and calibrated EVB ESR meter |
|
Flowmeter
flowsensor circuit |
|
Frequentiemeter 4093, 555, in Dutch |
|
Gaussmeter the strength of the magnetic field, magnetometer, Gaussmeter,
Hall effect Gaussmeter |
| Un indicateur de tension et un
VU-mètre en Français |
|
ICL7106/ICL7107 Digital
LED Ammeter (Ampere Meter) |
|
LED-matrix oscilloscope |
|
LED Stroboscope How to measure rotational speed using a stroboscope,
Building the stroboscope |
| LED VU meter |
| LED VU meter
VU meter, LM3914 |
| Lightning
flash counter
this circuit allows the detection of every lightning strike in a radius of
about 20-30 km from the counter, by receiving the EM pulse with a special
antenna |
|
Light Pollution Meter
Light Pollution Meter, Notes on the design and construction of a visual
comparison photometer for measuring sky brightness and light pollution |
|
Logic
Probe This logic probe uses a single CMOS IC and shows three logic
conditions, High, Low and Pulsing |
|
Lucht benzine meter
air/fuel measurement, lamba sonde circuit |
| LM3914 battery monitor
can be used to measure voltages |
| LM3915 dot/bar
display driver pdf file |
| Magnetometers
simple magnetometer, Hall effect sensor, opamps, Hall400S |
|
Multi Wire Cable Tester A multi wire cable tester with a separate LED for
each wire. Will show open circuits, short circuits, reversals, earth faults,
continuity and all with four IC's. Designed initially for my intercom, but can
be used with alarm wiring, CAT 5 cables and more, UTP cable |
|
Opacity meter for monitoring the rate of flow of powder used in a
rapid prototyping machine |
| Owens bridge inductance measurement device with
DC current capability |
| Oxygen Analyzer |
|
PC-Based Oscilloscope
This circuit conditions different signals of frequency below 1 kHz and displays
their waveforms on the PC’s screen. The hardware is used to condition the input
waveform and convert it to the digital format for interfacing to the PC, pdf file |
| Period to voltage
conversion |
| Power meter
Power meter circuit |
| PPM
and VU meter Peak Programme Meter circuit |
| Pulse-generator & signal-tracer 1.5V battery-operated |
|
Solar Panel
Current Meter This circuit is used to measure the current from a solar
panel. It has very low power loss for currents in the 0-10A range |
|
Spectrum Analyser
This DC to 50 MHz spectrum analyser uses a standard oscilloscope for display.
Dynamic range is better than 70dB |
|
Stroboscope
neon glow lamp, TIC 106D |
|
Stroboscope
Stroboscope circuit |
|
Stroboscope pdf file |
|
Test circuits oscillators, generators, testers |
|
Temperature Measurement System pdf file |
|
Thermometers for Brewers Sensing Temperature Electonically, Ready-Made
Sensors, Homebrewed Thermometers, Display Options, Building a Probe, Diode Demo
Circuit, Direct Reading Thermometer, Digital Panel Meters, ICL7106, Theory of
Operation of Thermometer Circuit |
|
Transistor tester
and signal injector Tests transistors - locates base lead and finds, CE or
BE shorts, Determines transistor gain, Outputs a signal for testing audio
circuits |
|
Triple Stroboscope This circuit enables observation of movement between
other stroboscopes. Generation of rectangular signal is based on NE555. This
circuit requires a low power supply that is made from a simple transformer TR1,
traditional rectifier bridge and zener diode |
|
TV testcard
generator |
| Ultrasonic
range meter |
|
Universal High-Resistance Voltmeter Universal High-Resistance Voltmeter with
opamp and Ammeter, pdf file |
|
Video
DVM Video-DVM is a very cheap DVM that shows how an output as complex as a
videocomposite signal can be generated entirely in software: two I/O pins and
three resistors are all the hardware required. Connected to any TV set it
displays voltages, included max and min peaks, using both giant digits and an
analog bar-display, Atmel’s AT90S1200, Digital volt meter with video output |
|
Voltage to Frequency Converter |
| Voltmetre à
afficheurs à LED en Français |
| Voltmetre
LCD en Français |
| VU-METRE à bargraph
(LM3914) en Français |
|
Wattmeter Project
Digital Wattmeter Project |
|
Zener diode tester 555 Timer IC |
|
|
|
Oscillator
circuits |
|
1KHz sinewave generator
simple circuitry, low distortion, battery operated. Variable, low impedance output up to 1V RMS,
2 transistors |
|
Microphone circuit test oscillator 440 Hz |
|
Simple Audio Oscillator
for testing amps and speakers |
|
Sine, Triangle and Square Wave Generator Intersil's ICL8038 is a simple VCO
(voltage controlled oscillator) chip |
|
Sine Wave Generator
Sine Wave Generator, A classic Wien Bridge oscillator using an Op-Amp covering a
frequency range of 15 to 150kHz in four switched steps |
|
Horizontaal |
|
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Last update:
2009-01-14
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