Hi There!
I've build Fedde's NONOZ-II DAC using the CS8412/TDA1543-combination and my own PCB-layout. Is there a way to put a "signal-lock"-LED on the CS8412 so I can see if a signal is present on the input of the receiver?
/U.
I've build Fedde's NONOZ-II DAC using the CS8412/TDA1543-combination and my own PCB-layout. Is there a way to put a "signal-lock"-LED on the CS8412 so I can see if a signal is present on the input of the receiver?
/U.
Pin 25, the ERF flag goes high when out of lock. I use a red led to gnd so that it goes out when the signal is locked. Connecting an led between V+ and pin 25 will do the opposite.
Re: Lock LED
So an LED + a resistor from pin 28 to V+ will give me the indicator I want, right?
/U.
scottnixon said:
So an LED + a resistor from pin 28 to V+ will give me the indicator I want, right?
/U.
You can see how I have done. Note also that I take out the frequency information with a flip-flop.Nisbeth said:
http://home.swipnet.se/~w-50719/hifi/dac/dac_schema_sida_1.html
28 is fine
Nisbeth, I think you've got it... If you hard tie the anode to a +5, a 200 - 1000 ohm ought to do fine, depending on the LED. You can do the reverse with pin 25, BUT I'd rather 'ground' an LED to fire it as opposed to actually using the chips internals to drive it high. That's just me 🙂
Nisbeth, I think you've got it... If you hard tie the anode to a +5, a 200 - 1000 ohm ought to do fine, depending on the LED. You can do the reverse with pin 25, BUT I'd rather 'ground' an LED to fire it as opposed to actually using the chips internals to drive it high. That's just me 🙂
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