Recent content by Jim-TX

Doing a bit of brief thinking on this... Almost everything you need is already built into the IRIN command that you should use for the Infrared input. I spent a few minutes and cobbled together how I think I would approach your predicament. For those of you who are experts, please go easy on...

RE: Could the program be written to ignore any double key codes: It would be easier to put in a delay of... say... half a second - before scanning for more codes. To make sure all codes have been received before processing, require the 'Enter' key to also be pressed. So, the user would enter...

"So, pressing "1" will perform a certain function and pressing "12" will perform something else, and pressing "123" will perform something else entirely." I have worked a lot with IR controllers (Sony protocol). My first question is why are you wanting to do the 1-2-3 keypad entry? Why not use...

The blue leaded part is most likely a Transorb or Varistor - for AC line protection, as you have indicated. I'm not sure what the three IC-looking parts are, but my guess is that the LEDs are connected in series. White LEDs have a voltage drop of around 3.5 volts. This number varies depending...

Oh. Okay. Well, in all of this conversation, I was working on a method for determining the voltage - based upon the raw values read. If I were doing it, I would use a SELECT CASE statement. But that's just me. I'm sure you will get a much better response from the experts here.

Sooo… I guess I am still trying to figure out what you are reading. Your actual number that the ADC is giving you. The 32-bit - yes, I know it needs to be massaged to 24-bits - but what is the actual 32-bit binary number that you are getting - for both resistors. 330 ohms = xxxxxxxx xxxxxxxx...

The numbers don't make sense. If 16,777,215 = 5.0V and 8,388,607 = 2.5V, then it stands to reason that 4,194,303 = 1.25V. When you have a 330 ohm resistor plugged in as R2, you are getting a reading of 8,333,034. According to the above numbers, that is very near 2.5V. But - if you do the math...

If I am not mistaken... the numbers that you are obtaining from the ADC - are... not ohm values... but a voltage value that then needs to be converted to a resistance value?? (Showing my ignorance here...) You have a voltage divider circuit. +5 volts across the 1k and the 'X' resistor.

For a schematic, see #30 above - unless he has changed it.

...then have the statement... b5 = 0 right before you drop into the routine... ? I guess without seeing the code I can't know how you are doing things.

I think <he says slowly> I see what you are doing. I was slowly coming up with the same method for bit-shifting the four bytes into the needed three bytes of data. Looking at it though... could your If/Then be made a bit easier? Start with a statement like b5 = 0. Then could you eliminate the...

I guess that might be a use for one of these... ??? https://www.goldmine-elec-products.com/prodinfo.asp?number=G15396

First, I apologize if this is posted in the incorrect forum. I scanned the other forums, and could not figure out where to put this. Hopefully, this forum is acceptable. In another thread, there was a discussion about getting a design made using home-etched PCBs. Other methods were also...