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Has anyone used a SIM card for something like a data logger? They're considered disposable and a lot of applications don't require much capacity. Being able to swap out the memory on the fly and review it at leisure would be an asset.
how to initialize the nokia 3310 display
...ignore...
...not that I'm too pleased that what I wrote uploaded without me explicitly hitting the "commit" key...
First you will need dual power rails at +/- 170 volts (assuming 120 VAC, for 240 you'll need +/- 340) capable of supplying 1k5VA continuously (more is better).
Next, the easiest method I can think of is to use a microcontroller with PWM hardware to drive an H-bridge.
Some feedback to track the...
What he means is that if the transmission line has a characteristic impedance that matches the source, then the length of the line doesn't matter- the load will always see the same impedance source. There will still be attenuation that is proportional to length. It requires that a load be...
sv650 rectifier
I am not surprised that the regulator is burning out frequently. Most electronic devices that sell so many have parts removed to make them less expensive (5 cents each at ten million sold saves the company $500,000). If one in a thousand breaks while under warranty, it still...
thermocouple thermostat
There are several chips from Dallas/Maxim that have an ADC with full scale 51.2 or 64mV. These can be used with thermocouples. Look under battery management or battery protection.
How long do you need it to last on one set of batteries? If you have pins to spare, you can control power to the accessories (LCD, sensor). The RTC may have it's own battery, but you should keep it powered when you can. The uC probably only draws a few mA.
pic16F877A
If this is for a school project, please don't ask someone else to do your homework.
As for the question at hand- what is the goal? Are you trying to make a 60Hz 3 phase power inverter? If you only want to control pulses going out on 6 I/O pins every 8333uS, then you may be a lot...
RTC ds1307
If I give you the code I wrote, I will still have to explain how to splice it to your application. You will take just as long to write your own.
As for the RTC, it is inert until activated. There is a bit in one of the registers that controls whether the clock is running or not...
The clock is implied. Both both devices "know" how fast it's supposed to go.
That depends on a lot of things. IIC was designed for several chips in the same device to communicate with each other. The range is fairly short because the power use is low. If you want to use it over long...
The best that could happen is that the increased frequency increases the current proportionally, and is nothing more than a thermal problem that can be handled by rigorous attention to intake v. dissipation.
A sneakier and more problematic failure is that the instruction codes will not process...
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