Search found 4 matches

by mictester
Thu Feb 15, 2018 6:15 am
Forum: Discussion and pointers
Topic: Phono preamp stage
Replies: 3
Views: 2806

Re: Phono preamp stage

If you want to build your own phono preamp, I'll post the circuit that I use. It doesn't need any exotic, expensive parts and is designed to be battery powered. It uses a pair of cheap, low noise dual op-amps and provides RIAA equalisation to within 1 dB throughout the curves. It's best to match the...
by mictester
Mon Feb 05, 2018 1:21 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: XLR input into Audio Injector Zero
Replies: 2
Views: 1853

Re: XLR input into Audio Injector Zero

The microphone level input needs to be fed with an unbalanced signal. The easiest (but most expensive) way is to use a microphone transformer. These have a centre-tapped primary - for connection to your microphone - and a secondary that can have one leg grounded and the other applied to the audio in...
by mictester
Thu Apr 13, 2017 5:37 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Audio Input Only
Replies: 14
Views: 57325

Re: Audio Input Only

Matt Your "Zero"-sized card could be an ideal solution. I've already kludged together a "Pi Zero" with one of your cards, and it works well. A smaller card would be ideal, particularly for the portable Outside Broadcast gear. If this smaller card has both input and output, it would be simple to have...
by mictester
Fri Mar 17, 2017 8:06 am
Forum: Stereo soundcard for the Raspberry Pi
Topic: Audio Input Only
Replies: 14
Views: 57325

Re: Audio Input Only

A line level stereo input-only board would be very popular. There's virtually nothing like that for the Raspberry Pi, and I have a great little application - running DarkIce on the Pi as an audio streamer to my radio station web server will be ideal. At the moment I have a couple of the Wolfson card...