The project is moved over here so we avoid hijacking the other thread .
A brief resume, i wanted to build the Jaycar Phoenix Mk II but there was also little hacks/changes on the original design, what i did was redesign the original schematic and add my own changes, plus all gw1 hacks in one ready to be build board. As soon the project get tested and ready, schematic and board design will be released in PDF format so anyone can build your own 'msay MKII' for free.
So far the features are:
- GAMMA & DELTA modifications.
- One Tactile Switch to change PH/JDM function.
- Individual led's to indicate PH or JDM mode.
- Inverter mod that can be activated by jumper.
- D-SUB9 pins 6, 9 and 5 connected to ground.
- Added suggested capacitors to Smart Card VCC.
- Added shottky mod with 1N5819.
- Every IC has now a 100nF bypass/decoupling capacitor for better stability.
For now this is the schematic that we are using:
And this is the board:
Now i will resume the conversation of this project on this thread.
The first board is ready:
I left the board on for about 2 Hrs, no smoke, fire or explosion, all components run cold, this is good. There is one more bug to fix, the transistor at the output of pin 3 (555) set the interface to JDM when you first turn it on, it was design to start at PH mode.
We can remove T2 and R13, both 4053 works fine without it, connecting R21 direct to SWCLK. Other important thing is that there are different types of 4053 that can handle 3.3V/5V/15V according to Philips
The 4053 that i use was 4053
B.
The suggested 74HC
U04 is hard to get in my country, Farnell has it under farnel code
1287555 but i have to wait about 3 weeks to get it, for now i will stick with 74HC04 until Farnell deliver my 74HC
U04.
All switches/modes and visual controls are working fine, i've put my STB satellite card in and the data led flashes for about a second than stop, looks like it want to talk.
I did not test the interface yet, i could not find a serial cable, i have one serial cable that has a male <> male DB9 end, and i need a female<>male one. I was searching the internet but all i find is people selling the cable that i need instead of the correct way to build one, the close info that i could get was and
Does any one know the pinout of this cable??
After the tests i will update the schematic with all the changes suggested by gw1 and my own.
Thanks.
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