Ammeter

A simple electronic multimeter offers an affordable alternative for hobbyists deterred by the high cost of conventional multimeters. This device is designed to measure three ranges: (i) 0-15V, (ii) 0-15mA, and (iii) 0-150mA, with the possibility of extending the...

The ammeter measures currents ranging from 100 pA to 100 µA without the need for costly high-value resistors. Accuracy at 100 µA is constrained by the offset voltage between Q1 and Q2, while at 100 pA, it is limited...

Bipolar junction transistors transfer a current from a lower-resistance emitter to a higher-resistance collector. This property can be utilized to measure inductance. Bipolar junction transistors (BJTs) are semiconductor devices that play a crucial role in electronic circuits by enabling the...

The complete meter amplifier is a differential current-to-voltage converter featuring input protection, zeroing, and full-scale adjustment provisions, along with input resistor balancing to minimize offset voltage. The complete meter amplifier serves as a crucial component in various electronic measurement applications,...

The circuit employs CA3160 and CA3140 BiMOS operational amplifiers to achieve a full-scale meter deflection of ±3 pA. The CA3140 functions as a 1T0 gain stage, supplying the necessary positive and negative output swing for the meter and the...

This is a variation of Mr. Marian's "Simple Micro Ampere Meter Circuit" that employs active circuitry and an analog meter to measure sensitive DC currents. The circuit in question is designed to provide precise measurements of very low DC currents,...