Recent content by JimmyAlz

Did a quick google and found Microchips floating-point library for PIC16/17: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en010961

If you google AppCad you will find a free RF design package with calculators for different transmission lines.

You might want to read what Rod Elliot has to say on the subject of Nelson Pass's ZEN Amplifier: (Is this what you are looking into?) http://sound.westhost.com/project36.htm

Look at the voltages at the LED's. Some of them are negative; your simulation program can't handle this case. (In real life current would be very large and the diodes would catch fire)

Perhaps a thyratron tube would work better in this case? I am guessing they are expensive however. You will need some serious power to switch 1kV at 10MHz. Minimizing capacitances will be critical. Now that I think about it, how about a surplus high powered radio amplifier?

The bolometer elements does not overheat because: 1) There is always some heat loss through conduction to the substrate. 2) There is always some heat loss through blackbody radiation to/from the sensor case. 3) When designing bolometer elements you *want* to have some heat loss, otherwise you...

FLIR systems in the U.S. sells bare sensor chips and readout ASIC's. http://www.flir.com/cvs/cores/components/ I hear you :) That was the motivation for my thermal camera project as well. I'm about 60% done after 600+ hours of work. For a still image camera of 96x128 pixels. But I have...

I was a bit unclear ... you will need two regulators: one adjustable 0 to 35V and one fixed or adjustable set to +17V.

Easiest would be to generate a "fake" ground at +17V and then find a regulator that can do 0 to 35V. What I mean by that is that you should keep the power supply isolated from ground and then connect the case ground to the +17V output of your power supply. Search digikey.com (US) or farnell.com...

I don't know of any book but I have some experience in this field. Just thought I should warn you: That sound like one of the most difficult projects you can get yourself into. You will need knowledge of the following: * DSP/Microcontroller programming * High performance analog amplifiers *...

Take a look at a PC mainboard that uses DDR2. The pull-ups are easy to find. Just use the same size as that manufacturer uses. Yes from what I understand length is critical. Again take a look at a PC mainboard, you will see many "wiggly" lines that adjust the lengths. I don't know about...

Alright! Every day you learn something new :)

If your antenna is shielded it will not work as an antenna.

I'm confused, what do you mean by "(which is placed before the call)"? The placement of the code does not matter. this will work: org 0 ; or 0x0000 or 000h (all mean the same thing) goto start init <some code> retlw start call init main...

Checked the data sheet ... 16F690 doesn't *have* stack overflow reset ... :/ So what happens is that the "retlw" instruction fetches an uninitialized value from the stack and jumps to it. So your code #2 works because you are "lucky". The uninitialized value just happens to point inside...