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Voltage N Current Display

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85 Threads found on edaboard.com: Voltage N Current Display
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? (...)
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 (...)
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 -
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 (...)
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?
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
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 (...)
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 (...)
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.
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
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; (...)
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 (...)
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
what voltage and current range are you interested in?
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 (...)
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.
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
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
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
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 (...)