I was developing a small DIY project where the humidity should be controlled, the microcontroller for the brain is our good old friend – pic16f628a.
Starting as usual from the datasheet reading.
Continue readingI guess, that sooner or later any developer has a question in his head – how do I save the data if the supply shut down?
There are some solutions listed:
The code of the DIY amplifier has grown much, it is harder and harder to debug it and keep in the order. So first of all I have added the audioprocessor part to the existing code, not much to discuss it is already been considered. Only one thing – I added the display LCD functions instead of the uart menu. I still want to have the USB connectivity so I can take control over amp from the PC. The plan is to use the FT232 with the virtual com port. Of coarse, it would be a nicer way to use PIC18 with USB on-board, but at the moment of time I did not have the experience with it, and now, when I actually have it – I would still go the virtual com path, usb has too much of the hustle to implement and handle nicely, besides it is not free for use as usual usb.
Continue readingAnother movement towards finishing my “pet” project – an audio amplifier with remote control.
It was a hot, really hot, really very hot summer in 2012 in place where I used to live. I bought some cheap fan, though it was quite powerful, but there were two major drawbacks for me:
During exploring of my stashes I stumbled upon those two bad guys:
Now it is time to provide an appropriate voltage supply for the audio-amplifier. Since I care about the noise and the amplifier is dedicated to work from the outlet only, I decided to move in the linear stabilization direction.
What do I want?
In the last article I reviewed the remote control based on the RC5 protocol, here I’m going to describe how I added it to my audio-amplifier.
Have to say, unlike usually, I did not meet any issues with this, so just describing the process.
Continue readingIt is time to put my hands on the IR protocol.
The goal: To study IR protocol and gain the skills to work with it
Tools: a microcontroller PIC16f877A, an IR receiver TSOP1736(1738), devboard
I was debugging IR protocol RC5 and was regretting again and again that I still don’t have a scope at home or at least some small handy logic analyzer. All of a sudden I found the interesting item in the tool menu of Pickit2 software:
I completely forgot that the tool has a couple of useful items – uart, the logic analyzer, some kind of the debugger tool.
Continue reading