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How do we calculate the wattage of a zero ohm resistor.?
My purpose is to use them in 230V AC lines which may carry maximum 600mA. How should i choose the resistor?
To design it properly, we need to know the resistance of the coil. Try using two different resistors for both the led's and make the resistance value smaller for the led connected to relay.
You can drive them with a single transistor and a demux IC. Either cathode or anode of all the emitters should be connected together and connect it to the transisitor.Then connect demux lines to individual emitters.
Are you trying to use buried or blind vias?
You dont have to switch between layers to place a via. In via properties , you can edit the via stackup or you can also edit the start and stop layers to make it burried/blind
You can create any footprint or schematic symbol in the libraries.
Check this link
https://techdocs.altium.com/display/ADOH/Creating+Library+Components+Tutorial
The green color indicates design rule vialotaions. Place the mouse over the component and you can see the violation on headsup display menu.
The other issue, may be you used different origins while generating the gerbers. You have option for choosing relative and absolute origin while...
Whether you are using RF or bluetooth or any wireless module, the basic goes like this.
You will need a microcontroller and a wireless transmitter connected to your PC; one receptor and a microcontroller for each relay.
The easiest option i would say is you can buy readily available RF...
You could start with any of the basic controllers. I would recommend 8051 since you will get all the information on it easily.
Start learning it and then post your other questions one by one.
The time slows down because the xtal might not be oscillating at the intended 32.768KHz. Check the effective load capacitance which appears across the crystal and see whether it matches with the crystal load capacitance.
If you RTC has a clkout option, measure the oscillating frequency through it.
_ve pad is not shown since you havent given any copper(top layer). You have to give both top layer and top solder (and top paste too); but this is the worst way to do it.
Always place a pad as you have done for +ve terminal so that it contains both top solder and top layer already and you dont...
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