It's easier than you think - I bought an old non-working phone (a candlestick phone in this case), removed the innards and replaced them with a speaker and micr

It's easier than you think - I bought an old non-working phone (a candlestick phone in this case), removed the innards and replaced them with a speaker and microphone... it works really well! I had originally planned to make it accessible via bluetooth but when I realised the phone shell was thick brass, I decided to leave it as a 3.5mm jack