T&L Publications

Ricky, If the LED is flashing at a rate of once per second and the LCD display is working, the web server app is most likely working properly. If you plan do a lot of work with the web server app, I recommend you add a second network card to your PC. Almost any cheap NIC card will do. I am using a c...

Ricky, It sounds like there could be a IP routing problem between your computer and the web server. Is the address range of your local network 192.168.1.####7? If it is, you are in luck. You should be able to ping the server at 192.168.1.201. Since you tried this and it didn't work, my guess your LA...

Matt, The PWM functionality in the PIC24F series controller is contained in the so called "Output Compare" module. You can find the detailed specification for the Output Compare module at: http://ww1.microchip.com/downloads/en/DeviceDoc/39706a.pdf. The PWM functionality is syncronized with...

Matt, Come on in, the water is fine. If you are looking to get your feet wet in the world of microcontroller, this is a good place to start. I am happy to help but will have to do so on-line as I live in the Seattle area. If you are starting out from scratch, may I suggest the book called "Begi...

There is a great series of articles on embedded programming in N&V magazine called Smiley's Workshop. Starting in the April 2009 edition, the focus shifted from the AVR Butterfly platform to the Arduino. This may not be exactly what you are looking for since there is the same focus in interfacin...

The piezo "buzzers" (I prefer the term "sounder") used in consumer products now a days are fairly generic. They are like speakers with a really peaky response curve in the 2 to 3 KHz range. Typically, the microcontroller drives the sounder with a square wave around 2 KHz to make ...

I think C it the way to go except when you are doing something timing critical on an 8 bit processor where it is necessary to use assembly. That said, I have recently started to move away from the 8-bit PICs in favor of the 16-bit variety. I will not miss assembly language programming.

M, I built your blink.c code (with minor changes) and it ran just fine. I moved the LED to RB13 (already had an LED connected there) and added in the delays as I described. Here is the exact code that I built: #include "p24fj64ga002.h" #define FCY 16000000UL #include <libpic30.h> //config ...

I didn't try to build your code sample but as SETEC_Astronomy mentions, it looks like your LED will be flashing on/off at millions a time a second. In this case, the LED should look like it is simply lit. If you have an oscilloscope you can confirm this by probing pin 1 on the expansion interface bo...

You mean to tell me that nobody bought the 16-bit Micro Experimenter board except me? I finally got the Web Server demo running. There are a couple tricks to get it working but overall it is super simple. The first thing you will need is an Olimex Ethernet Interface board, model ENC28J60-H. These ca...

Have you checked out http://www.instructables.com/?

Right now they are running a Homemade Holidays Contest. There seems to be a lot of holiday goodies featured. I kind of like the LED Christmas tree myself.

The article mentions the possible use of a liquid antenna as an ultra sensitive strain guage. I assume the idea is that the strain on a bridge support can be inferred from the change of length of one of these stretchy antennas. Where in the world do they get the figure 0.3 percent accuracy and what ...

Is anyone else playing wth the 16-bit Micro Experimenter board from the December 2009 of N&V? I ordered one the same day my magazine arrived in the mail. The board went together quite easily and worked the first time no problem. Looking at the kit documentation (schematic, block diagram and boar...

If there is a DC current flowing through the core, the inductance will change with the DC bias. The closer the core is to stauration, the lower the inductance. Some old style (as in tube era) power supply inductors were actually rated for a range of inductance which was dependant on current.