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RF Outlet to Light Switch Hack
Cheap Home Automation Using Wireless Outlet Modules
Not a bad circuit, but a few things I would suggest.1. Definitely switch to a voltage regulator. LM7805 would be fine. How you have it now can source a maximum of 63mA or ~44mW (3 330 ohm resistors is equivalent to 110 ohms. Max current = 7v (voltage drop across resistors)/110ohms = 63mA. Max power = 63mA * 7V = 45mW. Using 1/4W resistors should be okay, but definitely do not use 1/8W. With the fan turned up all the way, the pot is drawing 15mA, so 25% of the total available current. My guess is the ATtiny uses about another 15mA min, though likely closer to 30-40 with the PWM clock running....So you're cutting it very close.2. Add a filter cap across the ATtiny's VCC & GND pins. 3. Add a small RC filter between pot and ATtiny to help smooth out the input. I typically use a 1Hz fil...
Not a bad circuit, but a few things I would suggest.1. Definitely switch to a voltage regulator. LM7805 would be fine. How you have it now can source a maximum of 63mA or ~44mW (3 330 ohm resistors is equivalent to 110 ohms. Max current = 7v (voltage drop across resistors)/110ohms = 63mA. Max power = 63mA * 7V = 45mW. Using 1/4W resistors should be okay, but definitely do not use 1/8W. With the fan turned up all the way, the pot is drawing 15mA, so 25% of the total available current. My guess is the ATtiny uses about another 15mA min, though likely closer to 30-40 with the PWM clock running....So you're cutting it very close.2. Add a filter cap across the ATtiny's VCC & GND pins. 3. Add a small RC filter between pot and ATtiny to help smooth out the input. I typically use a 1Hz filter, so a 1uF cap and 160k resistor (or 10uF cap and 16k, etc).4. Finally I'd use a different mosfet. The IRF540 has an Vgs(on) of 10v, so driving it with 5v, and depending on the fan current, could cause enough source-drain resistance to heat it up. Probably not bad, but a logic level would be more appropriate.
You definitely could. It would then just change color based on time and not have all the extra features.
Yes you can. He used the Tiny85 is because you only need 3 I/O pins, so the Uno is huge overkill. Plus the uno can cost anywhere from 3x to 6x more than a Tiny85.
The equation is in the video: I = Vin / R.I = CurrentVin = Voltage from potentiometerR = Resistance of load resistor (R1)If you increase R to say 10 ohms, then at 1 volt you'd have a current of only 100mA (1/10 = 0.1). If the maximum voltage is 5v, then the most current for this resistance would be 500 mA.If you know the maximum current you want to achieve, then use this formula to choose the value for R: R = Vin / I.So if you want a 1A maximum load, then R would be 5 ohms (5v / 1A = 5ohms).
Illuminated Christmas Tree Ornament [WiFi Controlled]
So you just plugged the 9v battery into the 120VAC input and it worked?
"4. Then all wires are soldered. You can connect the PS2 cable to you Arduino. Use this schematic here for that."Am I missing something? I don't see a schematic.
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