Search found 1172 matches

by ThePyroElectro
Thu Aug 21, 2014 7:43 pm
Forum: Introduction to CPLD and FPGA
Topic: #9 Design a Handheld POV [Post Homework Here]
Replies: 5
Views: 7161

#9 Design a Handheld POV [Post Homework Here]

A new lesson was posted today:
http://www.pyroelectro.com/edu/fpga/handheld_pov/

Post your homework answers here to compare with everyone else!
by ThePyroElectro
Tue Aug 19, 2014 6:45 pm
Forum: Introduction to CPLD and FPGA
Topic: #8 LED Dimming via PWM [Post Homework Here]
Replies: 6
Views: 8522

Re: #8 LED Dimming via PWM [Post Homework Here]

Chris here is my homework HOMEWORK QUESTION 1 Name 2 uses of PWM output signals. Driving leds Driving motors Emulating a DAC (with a LC filter on output) , i have used that for variable "contrast" on a "standard" 2x16 HD44xx char lcd. HOMEWORK QUESTION 2 What modifications would...
by ThePyroElectro
Mon Aug 18, 2014 2:52 pm
Forum: Introduction to Digital Electronics
Topic: in the SR latch schematic what do R3 and R4 do?
Replies: 3
Views: 6048

Re: in the SR latch schematic what do R3 and R4 do?

I think I understand now, Roughly, I think it prevents a short circuit from being set up when the switch is pushed down. Sorry for the super basic question, I have a lot to learn still! Hi Cardflopper, The 10kΩ resistors (R3/R4) are pull-up resistors. These are used to set the input to the logic ga...
by ThePyroElectro
Sat Aug 16, 2014 1:54 pm
Forum: Introduction to CPLD and FPGA
Topic: #8 LED Dimming via PWM [Post Homework Here]
Replies: 6
Views: 8522

#8 LED Dimming via PWM [Post Homework Here]

A new lesson was posted today:
http://www.pyroelectro.com/edu/fpga/led_dimming_pwm/

Post your homework answers here to compare with everyone else!
by ThePyroElectro
Tue Aug 12, 2014 6:53 pm
Forum: Introduction to CPLD and FPGA
Topic: S3E Lesson7
Replies: 13
Views: 16608

Re: S3E Lesson7

Is that in the "pin-planner" on ISE ? I haven't used it yet .... I prefer the UCF file directly. But i prob. have to try it , if not for else than to see what options i can give in the ucf file. Yea, modifying the UCF is a preferred way to do it: http://www.xilinx.com/support/documentatio...
by ThePyroElectro
Tue Aug 12, 2014 3:14 pm
Forum: Introduction to CPLD and FPGA
Topic: S3E Lesson7
Replies: 13
Views: 16608

Re: S3E Lesson7

Chris here is my implementation on the S3E Starterboard. ISE wasn't really happy , i got two warnings WARNING:Pack:249 - The following adjacent carry multiplexers occupy different slice components. The resulting carry chain will have suboptimal timing. Mcompar_ticks_cmp_ge0000_cy<12> Mcount_ticks_c...
by ThePyroElectro
Mon Aug 11, 2014 3:01 pm
Forum: Introduction to CPLD and FPGA
Topic: #7 Parallel Hardware [Post Homework Here]
Replies: 3
Views: 6666

Re: #7 Parallel Hardware [Post Homework Here]

Hi Bingo, Correct answers! I would add two simple comments [Question 1] We can even control process flow so that they can either both be serial or parallel with other processes. Like for example if we first divide down a clock frequency with a process and then use that slower clock signal to run ano...
by ThePyroElectro
Fri Aug 08, 2014 4:43 pm
Forum: Introduction to CPLD and FPGA
Topic: The advanced stuff
Replies: 15
Views: 16987

Re: The advanced stuff

Propeller Source released http://www.parallax.com/microcontrollers/propeller-1-open-source But it seems a bit resource hungry if it can't be fully implemented on a DE0-Nano. Wonder if a Cortex combined with a cheaper fpgaboard wouldn't be as powerfull /Bingo Nice to get some more professional code ...
by ThePyroElectro
Thu Aug 07, 2014 5:19 pm
Forum: Introduction to CPLD and FPGA
Topic: #7 Parallel Hardware [Post Homework Here]
Replies: 3
Views: 6666

#7 Parallel Hardware [Post Homework Here]

A new lesson was posted today:
http://www.pyroelectro.com/edu/fpga/parallel_hardware/

Post your homework answers here to compare with everyone else!
by ThePyroElectro
Thu Aug 07, 2014 2:33 pm
Forum: Tutorials
Topic: Simple PIC USB Interface
Replies: 5
Views: 7075

Re: Simple PIC USB Interface

I think it is a stupid question but I want to know that could I do USB Interface with the PIC 18F4620? Because I have to do a project about communication between SD Card and PC via PIC 18F4620. If this way is impossible, I will do with UART. :) Thank you very much! PIC 18F4620 does not have a USB m...
by ThePyroElectro
Thu Aug 07, 2014 2:31 pm
Forum: Projects
Topic: pyro propeller clock
Replies: 1
Views: 3386

Re: pyro propeller clock

Hi, I have built the circuit as well as programmed the PIC. When I switch the board on, all LEDs come on and no clock is shown during the rotation of the fan. Can you suggest any solutions? Sounds odd. The LEDs should only briefly come on to spell out the initial clock message. Then they wait for a...
by ThePyroElectro
Wed Aug 06, 2014 5:09 pm
Forum: Introduction to CPLD and FPGA
Topic: Pin Planner problem
Replies: 2
Views: 5510

Re: Pin Planner problem

Sometimes, when I open up the pin planner window, i can't see the pin needed, just a message " MAX3000A, Cannot display Pin Planner: the current Compiler settings assign an AUTO device " , sometimes i can see the CPLD. Also, i was unable to change the INPUT location or OUTPUT location, wh...
by ThePyroElectro
Tue Aug 05, 2014 12:59 am
Forum: Introduction to CPLD and FPGA
Topic: I can't read the schematics ...
Replies: 4
Views: 6297

Re: I can't read the schematics ...

OK, it turns out that I can actually download the PDF and then I can increase the magnification. However, in the browser it is unreadable (even on my 19xx*1280 monitors at work.) Yea downloading the pdf is the better option. The in-browser zoom sucks, at least the firefox one I was using. I had ima...
by ThePyroElectro
Mon Aug 04, 2014 10:30 pm
Forum: Projects
Topic: Pyro Propeller Clock POV
Replies: 89
Views: 76425

Re: Pyro Propeller Clock POV

alexfenix wrote:can i have the .hex file? i can´t make it with mplab x :(


Hello,

Download & install the C18 compiler, connect it & make a project with it in MPLABX.

Then setup the configuration bits as appropriate for the PIC you're using.
by ThePyroElectro
Mon Aug 04, 2014 7:06 pm
Forum: Projects
Topic: 27MHz 555IC Simple Transmitter & Receiver
Replies: 7
Views: 9966

Re: 27MHz 555IC Simple Transmitter & Receiver

But do u think that the range i am getting can be increased even furthur by some tinkering in this existing circuit or do i have to apply some pre-amplifier and RF Power Amplifier stages??? thanks! Hello, That is good news. I believe you can get more range by tinkering with the circuit. Some sugges...

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