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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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VOLTAGE & CURRENT CALIBRATION x CURRENT CALIBRATION xx ELECTRIC POWER SUPPLY xx SIGNAL GENERATOR A ladder circuit produces a series of reference voltages separated by 3dB increments. Useful as part of a digital VU or power level meter using LED's for display. An active voltage reference. Variable zener makes useful dc voltage calibrator. Used in regulated voltage supplies. Simple calibration standards circuits. (1) Precision 2.500 volt standard. (2) 1-MHz frequency standard. Mini metrology lab to study the science of electrical measurements (electrical metrology). Make high-accuracy DC measurements and calibrate other test equipment. Part 1. Build a stable voltage standard. Build this precision voltage/current reference. Output ranges between 1 millivolt and 10 volts and between 1 microamp and 10 milliamps. Stability is better than +/- 100 ppm (parts-per-million) per-degree Celsius. Stable, low-cost, reference power supplies. Design of a standard voltage supply for small laboratories or shops, using economy grade transistors as temperature-compensating diodes. May be used as a DC or AC calibrator to monitor small voltage changes. Low-cost precision calibrator for oscilloscope and VTVM. Low-cost DC voltage calibrator circuits. Stable reference-voltage supply produces -8.45 volts. Method used by an Air Force laboratory to calibrate digital voltmeters. Super-accurate voltage source for calibrating your VOM or VTVM. Uses only two components (a mercury cell and a resistor). Build a precision voltage source for calibrating voltmeters and oscilloscopes. This battery powered source will deliver a nominal 2.45-volts DC. Tips on calibrating ammeters, ohmmeters, wattmeters, etc. Precision voltage sources you can build. How to design and build simple, stable precision references sources. Circuit for a DC voltage standard and calibrator. Produces a steady 1 volt output with a 2% variation when the 9 volt power supply drops to 5 volts under load. An accurate audio voltage calibration standard to adjust VTVM or oscilloscope. Est. cost: $35. Simple reference circuit to test the line and load regulation of power supplies delivering 5 or more volts. A look at the voltage comparator and its use in logic control and instrumentation equipment. Application circuits for a reference supply, a 100-kHz multivibrator and oscillator, and a voltage controlled oscillator. Calibrator circuit for a VOM allows you to check voltage, current, and resistance scales. Precision references for current and voltage are used to check the accuracy of test instruments. Voltage calibrator circuit is used to provide outputs of 1- to 5-volts peak-to-peak. Precision voltage source features a temperature-compensated output from 1.00 mV to 11,000 mV. Used to calibrate test equipment or sensors. Operates from three 9-volt batteries. Two-Zener, two-volt reference voltage circuit is very stable. Design your own cheap, temperature-stable voltage references. Simple op-amp application circuits. (1) Fixed voltage reference. (2) Light-operated sensor. (3) Alarm sensor. (4) Voltage-level sensor. (5) Peak-voltage detector and hold. (6) DC motor driver and reverser. (7) Simple timer circuit to delay relay operation for up to 30 seconds. An in-depth look at a temperature transducer and precision voltage reference all in one IC, the REF-02. Time and voltage calibrator. Part 1. Build this time and voltage reference for use in calibrating precision digital test equipment. Calibrator delivers from 0 to 10 volts in 1-mV steps and from 0 to 999.9 microseconds in 0.1 microsecond steps. Est. cost: $150. Time and voltage calibrator. Part 2. How to build your own low-cost, high-precision voltage references using the information presented here. Build this pocket calibrator for volts and ohms. Use it to calibrate your test equipment. Est. cost: $35. All about calibration. The quest for perfect measurements. New accuracy standards for ohms, volts, amperes, and time. Op-amps show their versatility in instrumentation circuits. Includes circuits for rectifier, peak detector, AC/DC converter, voltmeter, ammeter, ohmmeter, voltage reference, and power supply. Circuit for a precision current source delivers 50mA AC constant current for testing loudspeakers. | |||||||||
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