Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi, i have delta-to-star isolation transformer for isolation and i need to indicate when any of RYB phase failure in both delta and star.
I tried resistor and diode based circuit but it was not solved my problem and i attached the image of that circuit+.
My condition is If R-phase fails in...
Hi, i have a microcontroller based three phase preventer to protect two phase running loads and which is old model and don't have display and keypad, now i like update that preventer to showing all parameter like phase and line voltage, current, frequency, phase sequence fault, over voltage and...
hi, i am going to design pure on-line sine wave inverter, ranges from 600va to 1000va capacity. i analyzed some reference design and i got how to make it. but only the point is choosing input EMI line filter and output flyback transformer. In reference design there is long calculation but i...
in three phase circuit calculation of line-line voltage can be from
Vry = 2 * Vphase voltage COS(30);
Vry = √3 * Vphase voltage;
sometimes phase voltage of Vr and Vy can be different level, when how do we calculate Line-Line voltage?
my project is based on PIC18F45K22 controller, in this project i read ac voltage at every 50ms by timer interrupt. i configured adc and timer everything is perfect untill input is present. if input AC voltage is removed the adc conversion process stopped and again input is present then its...
Hi, i have CT of 100A:5A current ratio and turn ratio is 20:1. i saw some circuit that will have Rburden and diff-opamp circuit but it can only measure secondary current rating up to 30mA. In my requirement Isecondary is higher for that how do i find Rburden and i want to conditioning the signal...
Before some days i planned to design a energy meter to monitor a ac main P=IV. After googled i got a circuit, the circuit works fine. But i am unable understand how the circuit woks? can anyone help to get a concept?
Vac = 250v
In that circuit after R1(100K/2W) Vdrop = 26Vac,
After D1(1n4007)...
you explained well. The mistake i did was, board contain board outline polygon defined in bottom layer, then i removed that polygon defined in bottom layer and i clicked ratsnest icon it works fine. if i want to update airwires when polygon defined in board then i should use command line as...
john you understood what was my problem and you gave the answer what i expect thanks for that. airwires updated through command line without pouring, is there any other option to do same operation, by clicking icon?
i am unable to refresh screen in eagle eda layout tool. Ratsnest only work when pouring in board. i want to refresh the connection when placement modification happens. is there anyway to refresh screen like orcad layout?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
