Re: The Thylacine higher line rate monitor
Posted: Sat Feb 24, 2018 5:17 pm
I am currently using a 7404 3,2768MHZ crystal oscillator for the circuit ,i am going order a LTC1799 to try a slight modification .
The LTC1799 - 1kHz to 33MHz oscillator .
Leaving the circuit with the original crystal oscillator for the frame rate side of it ,the monitor switches in 6hz 12.5hz 25hz 50hz and 100hz ,with a modification on the line side having its own crystal oscillator the LCT1799 and its own first 74hc4040 ic the line rate could be any early television standard or non standard using a course and fine multi turn precision potentiometers ...very simple circuit but the chip does come in the small SOT23-5 package
All fine in theory depends also on if i can sync this beast //i will just plod with a little bit of work at a time and test so on .
The resistors are w103 and 105 trimmers code so i think 1M and 10k
youtu.be/PNpb3vWbGRc
The LTC1799 - 1kHz to 33MHz oscillator .
Leaving the circuit with the original crystal oscillator for the frame rate side of it ,the monitor switches in 6hz 12.5hz 25hz 50hz and 100hz ,with a modification on the line side having its own crystal oscillator the LCT1799 and its own first 74hc4040 ic the line rate could be any early television standard or non standard using a course and fine multi turn precision potentiometers ...very simple circuit but the chip does come in the small SOT23-5 package
All fine in theory depends also on if i can sync this beast //i will just plod with a little bit of work at a time and test so on .
The resistors are w103 and 105 trimmers code so i think 1M and 10k
youtu.be/PNpb3vWbGRc