3 ms·
Warning to the curious: it is very easy to fry your SID connecting directly to the audio in (don't ask how I know this). Make sure of your levels before you con
by classichasclass 4y ago
Warning to the curious: it is very easy to fry your SID connecting directly to the audio in (don't ask how I know this). Make sure of your levels before you connect, and don't plug this in with the power on in case there's a short.
- the_other 4y ago> don't ask how I know this Tease!
- myself248 4y agoI also know this. In my defense, I was like 9 at the time and didn't know about AC-coupling for audio signals yet. That smoked SID is still down in my basement somewhere, I wonder how much of it still works.
- diydsp 4y agoany suggestions to protect it? e.g. buffer with an op-amp, right? Any way to use diodes for static protection, etc.?
- deleted 4y ago[deleted]
- satiric 4y agoOne common way to provide input overvoltage protection is through a pair of schottky diodes. This article is a good resource https://www.digikey.com/en/articles/protecting-inputs-in-digital-electronics https://www.digikey.com/en/articles/protecting-inputs-in-dig...
- buescher 4y agoThat's a pretty good article. Also, the classic one-volt-or-so voltage limiter is a pair of antiparallel silicon diodes. You can put them in series for a bigger limit.
- classichasclass 4y agoThere are some good practical solutions here ( https://www.lemon64.com/forum/viewtopic.php?t=55483&sid=2710b178e3140bce3ba678a35910f05b https://www.lemon64.com/forum/viewtopic.php?t=55483&sid=2710... ) but the most important thing is keep the voltages down. They suggest three volts max peak to peak, which seems prudent.
- spacecadet_ 4y agoIs this still the case with recent audio hardware? I was under the impression that a typical instrument's output levels are far too low to cause any damage and that all inputs would be surge protected.