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Simple Portable Thermometer – Circuit Schematic
Simple Portable Thermometer
It is very easy to use and consumes so little current that it will work for the battery`s shelf life. The circuit uses a standard LM35DZ sensor (IC3) whose anal...
Build an Servo Scales – Circuit Schematic
Build an Servo Scales
With a bit of adeptness, you can build an electronic scales based on a servo motor. Depending on the type of servo you use, it can measure weights of up to arou...
The Measurements for MIT 3DL1 Run – Circuit Schematic
The Measurements for MIT 3DL1 Run
The chips that are termed "working well" yield about 300 mV under the beam from a laser pointer and between 40 to 80 mV under the LED light. Voltages around 100...
Tonal Electrostatic Voltmeter Device – Circuit Schematic
Tonal Electrostatic Voltmeter Device
An excellent way to provide continuous and direct indication of ESV readings in even a large lecture hall is to combine this instrument with a tonal voltmeter (...
CVS Oral Thermometer Dissection – Circuit Schematic
CVS Oral Thermometer Dissection
This very simple high-level design demonstrates the product`s structure. Its integrated circuit responds to button presses and senses temperature via the probe,...
Distance measurement system using PING Ultrasonic Range Finder – Circuit Schematic
Distance measurement system using PING Ultrasonic Range Finder
A PING Ultrasonic Range Finder to build up a system which is capable of detect and measure the distance (in mm unit) of the closest object in front of the senso...
A simple Electronic Microcalorimeter – Circuit Schematic
A simple Electronic Microcalorimeter
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A poormans oscilloscope – Circuit Schematic
A poormans oscilloscope
The oscilloscope is still one of the most important measurement tools of the electronic engineer. With the advent of the often very reasonably priced USB scopes...
Tube Tester for any budget – Circuit Schematic
Tube Tester for any budget
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The uTracer V3 a miniature Tube Curve Tracer – Circuit Schematic
The uTracer V3 a miniature Tube Curve Tracer
In an instrument like the uTracer, which handles voltages of several hundreds of Volts at currents of several hundreds of mA, it is obvious that an error or mal...
A Meter Clock for Eugene – Circuit Schematic
A Meter Clock for Eugene
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using a multimeter – Circuit Schematic
using a multimeter
A meter is a measuring instrument. An ammeter measures current, a voltmeter measures the potential difference (voltage) between two points, and an ohmmeter meas...
simple inductance meter – Circuit Schematic
simple inductance meter
This article describes how to build a simple inductance meter. The PCB layout is included.....
Tube tester – Circuit Schematic
Tube tester
Is a capable tube tester, yet its use scenarios can be multiplied with only modest efforts invested in understanding its schematic, regimes, and ways to add new...
handheld RF-Powermeter for multiple sensors up to 12 GHz – Circuit Schematic
handheld RF-Powermeter for multiple sensors up to 12 GHz
A couple of few years ago I had build a diode-sensor based RF powermeter using a 68HC11 microprocessor. Even before that I had build an analog RF powermeter wit...
GPS-Disciplined 10 MHz Frequency Standard / GPS-Based Universal Time Clock – Circuit Schematic
GPS-Disciplined 10 MHz Frequency Standard / GPS-Based Universal Time Clock
As shown in the block diagram above, the 10 MHz signal is produced by an oven-stabilized 10 MHz crystal oscillator that is locked by a phase-locked-loop circuit...
Radiation Detector and Meter DT-590A/PDR-56F Scintillation Probe – Circuit Schematic
Radiation Detector and Meter DT-590A/PDR-56F Scintillation Probe
This pdf file shows the schematic diagram of my home-built circuit to drive the PDR-56 probe. A JKL BXA-12579 inverter commonly used to drive cold-cathode fluor...
Expanded Scale Battery Volt Meter – Circuit Schematic
Expanded Scale Battery Volt Meter
This circuit is used to measure the voltage on a 12V (nominal) lead acid rechargeable battery system. It was specifically designed for use in solar powered syst...
Q-Meter – Circuit Schematic
Q-Meter
We know that every inductor coil has a certain amount of resistance and the coil should have lowest possible resistance. The ratio of the inductive reactance to...
PC Based Frequency Meter – Circuit Schematic
PC Based Frequency Meter
A simple technique for measuring frequencies over quite a wide frequency range and with acceptable accuracy limits using a PC. It follows the basic technique of...