Search found 18 matches
- Sat Feb 02, 2008 3:56 pm
- Forum: General Discussion
- Topic: Some thoughts on terrestrial digital broadcasting...
- Replies: 27
- Views: 13090
Re: hdtv and digital
Well I can only say that in my opinion (I have been in electronics for 50+ years and have a BSEE) that this whole digital mandate is about copy protection of movies and digital audio etc. Actually that is only a by-product of the situation. What happened is that the terrestrial broadcasters "c...
- Sun Jan 13, 2008 6:32 pm
- Forum: General Discussion
- Topic: Some thoughts on terrestrial digital broadcasting...
- Replies: 27
- Views: 13090
I try for band openings every now and again just for the fun. I wonder how this will show up under digital. Has anyone seen this yet? Right now, 1/08, many stations are not transmitting digitally at full power, full antenna height or even on their final channels. Once analog broadcasts are gone and...
- Fri Jan 04, 2008 2:41 pm
- Forum: General Discussion
- Topic: Random Number
- Replies: 6
- Views: 4235
- Fri Jan 04, 2008 2:33 pm
- Forum: General Discussion
- Topic: Tapping for audio and video signals...
- Replies: 11
- Views: 4619
Re: Tapping for audio and video signals...
...Now, how to tap video signal? Is it the contrast potentiometer wiper on a TV the right point? - As to use/adapt as 'video in' to monitor NTSC on a TV , or to get a video output from a TV that has no composite video 'RCA' connectors-... There is really 2 separate questions here. The first is wher...
- Fri Jan 04, 2008 2:18 pm
- Forum: General Discussion
- Topic: Some thoughts on terrestrial digital broadcasting...
- Replies: 27
- Views: 13090
ATSC is the best kept secret in America
Let's see .. so many comments to make here. Regarding music media; I've always felt that as long as a motor was involved the technology is archaic. Most of my music is on vinyl (that was the best media when I started collecting) and I didn't own a music CD until 1/1/2000. Now that everything is movi...
- Fri Jan 04, 2008 1:57 pm
- Forum: Up For Grabs
- Topic: WANTED: 7.50000 MHz osc
- Replies: 5
- Views: 5675
Thank you
Thanks for all the ideas/posts. I ended up using a 15.0 MHz osc and a 74LS74 to get the prototype working. I found a programmable osc at DigiKey and that solves my immediate needs. I did find the part at Fox, and requested some samples, but have not received them as of yet. For a production design I...
- Sat Dec 15, 2007 6:06 pm
- Forum: General Discussion
- Topic: Modify NTSC Tuner to ATSC Digital Tuner?
- Replies: 6
- Views: 3629
- Fri Dec 14, 2007 9:15 pm
- Forum: Up For Grabs
- Topic: WANTED: 7.50000 MHz osc
- Replies: 5
- Views: 5675
- Fri Dec 14, 2007 7:15 pm
- Forum: General Discussion
- Topic: remote control system built with discrete components, chips
- Replies: 9
- Views: 4561
How about using InfraRed?
I'm not sure what "medium" you want to use - RF, InfraRed, UltraSound or something else. Remote controls for garage doors are usually RF, while home electronics use IR these days. IR stuff is plentiful and cheap. You could easily build the transmitter half from one of dozens of ICs availab...
- Fri Dec 14, 2007 7:06 pm
- Forum: Up For Grabs
- Topic: WANTED: 7.50000 MHz osc
- Replies: 5
- Views: 5675
WANTED: 7.50000 MHz osc
I'm not sure why this is such an odd frequency, but everywhere I've looked has come up empty. I've got 7.3728 and 7.8791 but I need 7.5000 . Ideally this should be a 5 volt part in a "14 pin dip" type case, but I'll consider whatever you might have at the correct frequency. Thank you &...
- Fri Dec 14, 2007 7:03 pm
- Forum: Up For Grabs
- Topic: WANTED: Dead PRO-93 or PRO-95 for parts
- Replies: 4
- Views: 5219
LCD display
The one component I need most is the LCD display. It is 4 rows of 12 characters. Each character appears to be a 5x7 "dot matrix". I have a part number for the display, but have no clue who makes/made this part. Any searches I have done have come up empty. Perhaps someone out there has one,...
- Fri Dec 14, 2007 6:53 pm
- Forum: General Discussion
- Topic: Modify NTSC Tuner to ATSC Digital Tuner?
- Replies: 6
- Views: 3629
ATSC reception
You are better off to wait a short time (1Q08) and purchase one of the new converter boxes. They are suppose to cost about $50 and will handle reception, down-rezzing pictures to 480i, and outputting the signal as RF and/or baseband. Take a look at all the stages needed to receive ATSC. It is not ju...
- Fri Nov 30, 2007 8:38 pm
- Forum: Up For Grabs
- Topic: WANTED: Dead PRO-93 or PRO-95 for parts
- Replies: 4
- Views: 5219
- Tue Nov 27, 2007 10:03 pm
- Forum: Computer Programming
- Topic: Philips PXAG49...
- Replies: 4
- Views: 5465
PXAG49 in circuit FLASH programming
I've actually written code, which under software control can vector to the factory boot loader routine. I added this code after several CPUs failed and could not be programmed in circuit. Included in my routines are the ability to read all the registers (including AUXR) and the values loaded at BPC....
- Tue Nov 27, 2007 3:44 pm
- Forum: Computer Programming
- Topic: Philips PXAG49...
- Replies: 4
- Views: 5465
Yes the ENBOOT flag in the AUXR register can be overwritten. However, that condition is overwritten because of the hardware state of 2 pins at power on, as per note 8 on page 8: 8. The AUXR reset value is typically 00h. If the Boot Loader is activated at reset because the Flash status byte is non-ze...