[sdiy] Glowing diode on Casio CT-510 analog board?

[Roman Sowa]

Not to the extent that can be noticed. It was always kept in same 
conditions so there was not much light variance. Next time I may try to 
use flashlight to check if anything changes.

Roman


W dniu 2023-05-23 o 11:45, rburnett at richieburnett.co.uk pisze:
> That sounds cool Roman.  Was it sensitive to light when you opened the 
> case?
> 
> -Richie,
> 
> 
> 
> On 2023-05-23 08:52, Roman Sowa wrote:
>> If it glows, it is LED.
>> Those kind of early LEDs were used at least in one of the Korgs, Maybe 
>> Poly6 or Poly61, can't recall now, to indicate active voice.
>> I was shocked too when I saw them first.
>>
>> Maybe it's there just to make some cool light, but knowing early 
>> japanese designer's practice of cutting corners, this was probably 
>> used as voltage reference.
>>
>> FWIW, back in the 90's I used 4 LEDs to create expo converter to drive 
>> VCF. Turned out to be accurate enough for the filter. And it looks so 
>> cool when played, especially with deep LFO. Too bad I have to open the 
>> case to see it.
>>
>> Roman