I've already calculated the resistance to be 100 ohm for Red, 167 ohm for Green/Blue when using a 5V power supply.
The Radioshack 38kHz IR receiver (276-640) says to supply with .56mA max under no signal input. I'm assuming they meant 56mA.
I=5v/330ohm I =15mA -- Why such a low amperage when IR receiver says to use 56mA?
Since I'm using a low powered RGB led then I assume I don't need the ULN2003A driver to manage voltage to a high powered 5W bulb. Is that correct? I will wire up D11 to Green, D9 to RED, D6 to Blue.
I see a 4.7microFarad capacitor is wired in between the Vs input and GND of the IR Receiver. I understand that the capacitor stabilizes the current, but why do I need that for an IR receiver? Is it because detecting wavelengths (nm) accurately requires a stable voltage?
In the example it uses a 4.7microFarad capacitor, so how do I know what size to use?
I do understand lower power means less static, but doesn't it also mean less reception?
Why do I bother offering help when you ignore me? I'll say it again: your IR receiver takes 0.56mA max, not 56mA. If you don't believe me, follow the link to the datasheet.
ok R=V/I = 5v/56mA = 8929 ohms. So if I use a 10K resistor I get I = V/R = 5V/10K ohm = .0005A = 0.5mA so that's pretty close to what is recommended. I will still use a 4.7 microFarad capacitor however I really don't know if it is the correct size for my circuit. Someone other than manufacturers must know when to choose different size capacitor. Thanks! XD
Someone other than manufacturers must know when to choose different size capacitor.
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