Working on the electronic stethoscope instructable. NEED HELP!

Working on the electronic stethoscope intractable. And i dont understand the circuit diagram for where the 9v battery is suppose to go?


kelseymh4 years ago
You're more likely to get a response from the author if you post your question directly on that Instructable.
iceng4 years ago
Put the positive of the 9V battery at the + sign on top.

Put the minus of the 9V battery on the bottom line where the ground
symbol is located just below the headphones text.