Tag Archives: repurpose

New Hallmark Sound / Voice Recorder Card Teardown Article!

I got a birthday card from my dad for my birthday and noticed that it had a voice recorder circuit inside.  With a signal amplitude-activated motor and simple electret microphone + amplifier + loudspeaker assembly, there are tons of applications.  Visit the link below to check out the progress (busy, busy busy!) and there will be more info on what you can do with it.