YAMAMOTO PANEL METERS
#panel meter
#voltage measurement
#current measurement
#analog display
#industrial
#precision
#instrumentation
#monitoring
#electrical
#Yamamoto
No description available.
Mathematical approch to measuring current voltage and resistance of mixed series and parallel
There is one significant low-impedance node in the entire circuit, referred to as 0V, located at the frame and the intersection in the middle. The upper voltage source is connected to this midpoint through a 1kΩ resistor, indicating that the...
Current-shunt-amplifier
This circuit measures the power supply current of a circuit without using a current shunt resistor: R1 is only 3 cm of #20 gauge copper wire. A length of the power distribution wiring can be used for R1. The MAX420's...
Coulomb meter
Another cause of voltage drift is the input current of IC1, which slowly charges capacitor C1. This effect is particularly noticeable when the output voltage is approximately 0 volts.
The circuit in question involves an integrated circuit (IC1) whose input current...
high side current measurements
It is often challenging to measure the current in the positive lead of a power supply, such as a battery charger. Fortunately, specialized integrated circuits (ICs) have been developed for this purpose in recent years, including the Burr-Brown INA138 and...
AC/DC Microammeter Circuit
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, often...
ANALOG TACHOMETER READOUT
The analog display includes a frequency-to-voltage converter (IC12) along with bar-graph segment drivers IC10 and IC11. The calibration adjustment resistor R34 is configured to ensure that an engine speed of 5000 to 7000 rpm activates the first LED, which indicates...
Instrumentation circuit
The mechanical chassis prototype, as illustrated in the accompanying image, was constructed using two materials: foam and aluminum. Foam was selected for its ease of manipulation, while aluminum was chosen for its excellent strength-to-weight ratio. The prototype features a rotary...
EIGHT CHANNEL COMPUTERIZED 3SUP1 SUP SUB2 SUB DIGIT_VM
Displays up to eight different DC voltages on a CRT terminal of a microprocessor under keyboard control, using BASIC commands and a BASIC routine provided in the article. Utilizes a modified Motorola MC14433 dual-lamp integrating analog-to-digital converter. An unknown voltage...
Precision-full-wave-rectifier
This circuit provides accurate full-wave rectification. The output impedance is low for both input polarities, and the errors are small at all signal levels. It is important to note that the output will not sink heavy currents, except for a...