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Hello,
If I got a mains transformer with dual secondary windings how can I get a constant uninterruptible voltage from the other winding even if the other winding is shorted?
Does both secondaries go to 0 volts if one of them is shorted (both have same number of turns)? If they do how can I...
Hello!
If I got an optocoupler which CTR is 100-200% and I limit the input current to 5mA for example so max. collector current is 5-10mA.
If a load is LED I don't need any extra resistors to limit the LED current? Am I right?
teepee
Re: PADS Question
Hello and thanks for reply.
I meant that I need to design a PCB where is one footprint for two different component. That component might be from manufacturer#1 or manufacturer#2. Those components have different pcb pin pattern so I need an "adapter" decal.
I understood that...
Hello!
If I want to create pcb decal which has two different components pin pattern and there is only one component in schematic, how can I do that?
I mean that pcb decal has double number of pads than component actually have. Do I create a component in part editor with all extra pins NC-type...
Re: Voltage ratings
But is there any difference if the control is on or off?
The voltage is nearly 400VAC when the relay is OFF-state.
There is one relay connected to first phase voltage and another relay connected to second phase voltage. Relays are controlled separately so phases are...
Hello!
If I have a SSR with output voltage rating of 240VAC. Is it gonna blow if the voltage across output terminals is above 240VAC when there is no control voltage. I mean that the relay is not turned on.
When the relay gets control signal then the voltage is max. 240VAC.
Teepee
but..
Thanks for replies.
I think the Figure 77 in HCPL-316J datasheet put me into confusion. There is a plot "Switching Energy vs. Gate Resistance". I think that plot shows how much energy is generated in IC output buffer transistors with different gate resistor values.
switching energy?
Hi!
If I switch voltage to Mosfet or IGBT gate, it charges gate capacitance and takes certain amount of energy. How does it affect If there is gate resistor which restricts current flow. I know it decreases the switching energy but what is the equation to calculate it?
Hello!
I need to produce a 20kHz-30kHz frequency window and I'm wondering what would be suitable way of doing this. The frequency should be digitally controlled (eg. 8-bit) and it would be good if the whole 8-bit resolution is in the 10kHz range (30kHz-20kHz).
Thanks if someone come up with...
Hello!
Look at the page hxxp://home.iae.nl/users/pouweha/lcd/lcd2.shtml
There is basic principles and asm-codes for 16F84. I think it's not a big deal to implement it to another PIC.
TeePee
Generating frequencies?
Hello!
I need to generate a signal which frequency is 30 times faster than the input frequency and I would like to know has anybody any ideas how to do it.
The output frequency should be synchronised in certain point with input frequency. The maximum input frequency...
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