MiSTer FPGA Forum

I put a 100R in to increase LED current.. looks like nominally about 10mA now but SPDIF still doesn't work. So will try a few more LEDs and see if I get any better results. Big thanks to Nat for sending me some of the ones he has which work.

Thats Nat.. yeah that was an early photo.. it's properly lined up with the mini-Toslink cable that's plugged into the 3.5mm. IMG_7226-scaled-e1591881590775.jpeg The light output isn't as bright as the Toslink coming out of my TV.. maybe I need to give the LED more current ? Based on the measurements.. the LRCLK is 3.26v, the forward voltage is 2.17...

Hi, Appreciate some help - I've been trying to debug the SPDIF optical output. scope_3.png I have volumectl = 1, and am seeing PWM on the I2S header pin 1 which goes to the LED via 200 ohm resistor. LED is on and analog audio is OK too. a. Yellow waveform is the I2S pin b. Green waveform is anode of the LED Am testing this by feeding into a SRC-249...

Hi everyone, I build and support official MiSTer FPGA SDRAM 32MB, 128MB and IOBoards from Western Australia. I have sent hardware all over the world and my global shipping rates for RAM modules are really very reasonable! Please feel free to ask me any questions, or check out my stuff at www.caminventions.com. Thanks for all your support, and also ...