Bringing back thread from the dead...
I am installing my SIO2PC FTDI board internally (600XL) and would like to add external LED's to the upper case on the right side. The board has on-board LED's already and although it seems like it would be a simple procedure, I'm at a loss. I googled and nothing came up except this thread. Any assistance would be great!
This is the board I have:
It is an offical FTDI chip because I do not need a diode and it works flawlessly.
I do not have that Basic Breakout Board (FTDI FT232RL) type. I highly recommend that you test polarity (+/_) by a multi mater before going any further.
There are several ways you can add an external Led(s) to your board.
I will try to describe two of them only:
One LED only (red or green , etc.)
You need two wires. The first one should be connected to Atari GND pin (SIO4) or (the GND of the breakout board) to the short leg of the LED ( - ) via a 100-220 ohm resistor.
i.e. GND point --> Resistor --> short pin of the LED.
The other wire should be cumming from CTS pin on the board (Command pin #7 on Atari) to the long pin (+) of the LED.
i.e. CTS --> Long pin of the LED
The led will pulses whenever command is set.
Tow LED (red and blue as an example)
see the Picture.
Note: the negative point should be taken from the other side of the resistors (cut trace side) that are labeled (102 )
Also, use 2.5mm LED or smaller for best results.
Edited by Madi, Tue Sep 12, 2017 9:35 AM.