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# Voltage N Current Display

85 Threads found on edaboard.com: Voltage N Current Display

## Equivalent input noise source for one-port network [hlp]

Hi friends In Razavi's book it's mentioned that an equivalent noise voltage source together with an equivalent noise current source is needed at the input of a two-port network to display its noise performance at input. Now, my question is that what is needed at input of a one-port network to display its noise performance? (...)

## ADE7753 convert register's value into actual value like Voltage, Current, P.F.

Hello I'm usnig ATmega8 with ADE7753, display on 4 digit seven segment. I already read/ write ADE7753 register's bits n display register's default value on 7-segment (e.g. I read MODE (0x09) register's default hex value (0x000C) and displayed on 4-digit 7 segment like 0012 in decimal). Means there is no issue with SPI (...)

## inverter theory - how can I bring the inveter to resonance ?

hello dear forum, this below circuit is the schematic of an ultrasonic inverter 129223 I want bring the circuit to resonance by playing with the value of inductance between output transformer and the piezo element my question is ; if I display the current and voltage at the 220 VAC input with the osciloscope -

## 2 inch display circuit (about efficiency).

I would expect 10 to 20 mA average and 40 to 80 mA peak segment current for a 2" display. It has multiple LED chips (e.g. 2-4) in series connection, in so far a higher supply voltage than 5 V is required. Due to the forward voltage, the segments can be possibly still driven by a 5V open drain circuit. The problem is (...)

## PIC18F + 9V 20 mA 4 in. 7-segment display problem

Hello, I'm facing a problem here. I have four 7-segment displays, 4 inches each. There are common cathode. I'm trying to connect them in a PIC18F4550, but I'm failing in build a interface between the microcontroller and the displays (because the voltage level). Can someone help me?

## 16X2 LCD contrast voltage(Vo) is not stable

Hi, Usually the contrast voltage must be supplied by the user, not by the display. So if it is not in the expected range you should pull it to the expected level. This may fail if there is a high current in/out of the VC pin. Check datasheet to finde max. current and then check circuit on this. Klaus

## current measuring question

The question you did not answer was; Was the display backlight visibly fully on, when you measured the current? If not, it's the problem Audioguru describe. The current shunt in the meter has a voltage drop. Most backlights I've seen has a Vf between 4 and 5V, normally around 4V5. If you reduce the (...)

## current measurement using CRO

Sounds like you are trying to measure ?C supply current. 1. You'll use a series resistor with suffcient margin to minimal voltage, e.g. 100 or 200 ohm. 2. You can't display ?A to mA current in a linear range. I'm not sure if it makes sense at all to acquire current waveforms in the ?A range. You're (...)

## Help needed in programming pic as pure sine wave inverter with lcd display

Please i need assistance on how to write program in MikroC to a PIC microcontroller to work as an inverter and display some parameters like,battery level,output voltage,output current and power Urgent assistance needed please.

## Using a Micro controller as a pwm regulator in a SMPS

Yes its possible. I have used an MCU as PWM regulator with voltage and current feedback loops and other interface as well. If you do it right you might be able to increase the overall efficiency. ATMEGA is relatively more expensive than other MCUs I used. Microchip's PIC16F18xx series can be considered and if are able you can use NXP's LPC11xx whic

## LCD is not displaying anything

Hi, I am trying to display current and voltage values on LCD but its not working. I could see only "black squares" in first row.But if I remove any of the code part(current_read or voltage read) then LCD works!Here is my code: // LCD module connections sbit LCD_RS at RB7_bit; sbit LCD_EN at RB6_bit; (...)

## Microcontroller Power Supply(5v 3A)

hello, When you power up both PIC and display, is your 5V OK ( voltage value keep normal). If yes, it is not a probleme of max current value possible by the power source (3A instead of 1A capability) but a probleme of timing exposure to light up the led, and also if timing is very short, you must increase the curent value passing trough (...)

## 3 phase digital meter using pic

Dear all, O need to design digital meter that display current and voltage of three phase systemk 380v-400v please guide me how to make the connection and isolation ,i think aboit cts but not sure the way i will do it I am using pic18f and mikroc for pic, please post some link if possible thanks in advance

## three phase monitoring using pic mcu

what voltage and current range are you interested in?

## Can someone suggest a 1.5V rechargeable battery tester circuit for me?

Best intelligent charge monitor will pulse battery with light load and heavy load and compute C, capacity based on load voltage and ESR. For example using programmable current source ,pulse 1st 5 mA then 505 mA and use S&H to display ESR or delta V over delta I (0.5A) which is a function of C the Ah capacity of battery. Each battery (...)

## Dual Display Meters used for?

Or if it is simply two digital displays in one package it could for example be measuring voltage and current simultaneously. They are frequently used in the outputs of power supplies but could be employed anywhere where two readings are needed at the same time in a compact space. Brian.

## -20V display Bias voltage

i need more current! You didn't reveal your input voltage nor your output current requirement! You want us to guess? Perhaps this one could do the job. S. fig. 10

## comment lire un courant par un Pic18f452

what is the current range ? the current is not fixed, the idea is to apply a high voltage and later reading the current indicated, this current value must be displayed on lcd

## how to display current waveform on oscilloscope? (Multism)

The current through the diode will be proportional to the voltage across the resistor. So, put channel 2 of the oscilloscope on the other side of the resistor and use the math functions on the oscilloscope to display Ch2-Ch1. This will be 100k x . -Jonathan

## Server side programming for Data transfer between GPRS modem and Remote server

I have SIM300 module connected to an electronic hardware. I need to transmit certain information (voltage, current, etc) to a remote server. The purpose of this process is to display the information (voltage, current, etc) finally on a webpage which can be accessed from anywhere. I have come across a (...)