Analog Volt and ampere meter
The circuit described appears to be a voltage and current measurement device utilizing a moving-coil meter. The primary component is a moving-coil meter rated for 100 µA, which is suitable for measuring small currents. The mention of needing to create a new scale suggests that the meter may not be calibrated for the specific application, necessitating custom scaling for accurate readings.
The circuit includes a switch, designated as S1, which allows the user to toggle between measuring voltage and current. This functionality is crucial for versatility in applications where both types of measurements are required.
Two potentiometers, P1 and P2, are included in the design. P1 is a 25 kΩ trimming potentiometer with a 10-stroke adjustment, which can be used to calibrate the voltage measurement range. P2, on the other hand, is a 250 kΩ trimming potentiometer, also with a 10-stroke adjustment, likely used for calibrating the current measurement range.
The specifications indicate that there is a second moving-coil meter available from Conrad, which is pre-calibrated for a maximum voltage of 30V and a maximum current of 1.5A. This meter may serve as an alternative for those who prefer a ready-to-use solution rather than modifying the 100 µA meter.
In summary, this circuit design allows for the measurement of both voltage and current using a moving-coil meter, with customizable calibration settings provided by the trimming potentiometers. The switch S1 enhances the functionality by enabling the user to easily switch between the two measurement modes, making it a valuable tool for various electronic applications.For those who labvoeding built and flow of tension and a leader in providing circuit below was developed. If meter is a moving-coil meter 100?A useful. You have to make yourself a new scale. Also useful is a moving coil meter Conrad sells. This meter has already graduated to 30V and 1.5 A. S1 can be omgechakeld between volts and current measurement. P1 = 25k ohm 10-stroke trimming P2 = 250k ohm 10-stroke trimming = 100?A meter moving coil meter or Conrad Item No 135658 🔗 External reference
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