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With character LCDs, the problem operating at 3.3 volts with a 5 volt display is that the voltage required on the Ve pin for contrast becomes negative.
Say it requires 1 volt when operating from 5 volts, so it's 4 volts less than the supply voltage. When operating at 3.3 volts, Ve still needs...
A Sonoff module is quite expensive? Perhaps you didn't look at the link - it's less than US$7.
If you don't have WiFi available, it won't work, but I think that's going to be cheap by the time you make your idea work.
Whatever you do with the signal coming from the phone, you will have to...
In this case, you might be best to buy parts to create what you want.
A Sonoff 12VDC module will allow control from a smart phone app anywhere in the world if you have a WiFi network at home. You'd want the 12 volt version of this module, which has something they call"inching mode" - when you...
I missed the time scale on the plot - sorry. It was 3:30 am when I posted that and I was looking at the plot through one blurry eye.
Gary is right. Half the period is 0.5mS, so the full period of the square wave is 1mS.
T = 1/f where
T = period in seconds
f = frequency in Hz...
This is valid for any square wave. The frequency of the square wave is equal to 1 / period of the square wave.
Let's say the period is 0.01 seconds. The frequency is equal to 1/0.01 = 100 Hz. Hz = cycles/second.
If the amplitude of the square wave is 1 unit,
The sine waves comprising it are...
The plot shows a square wave is made up of odd-harmonic sine waves. A good discussion can be found here. Each additional higher-order harmonic makes the resulting waveform a bit more "square".
Only 6? Common, you know 555 timers and 2N3055 are bound to make an appearance! Probably cheap batteries and some comments slandering 4 billion people too.
Lung cancer is not the life sentence it used to be.
Two years ago, my partner went to the emergency room after eating some bad sushi. That turned out to be nothing serious, but the CT of his stomach revealed a nodule in his lung. He was 42 years old, had never smoked and had no known risk...
Here's a picture of a similar lock mechanism I brought at a junk store.
At 12 volts, it draws close to 2 amps.
At 18 volts, my current-limited supply at 5 amps shuts it down.
You can't put a reverse-biased back-end diode directly across the motor as the polarity must reverse to change the...
No issues at all, and each section will be operating at the design power level and take exactly as long as it's supposed to to reach temperature.
Make the length of each piece as equal as possible.
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