2. Intercom
Components required:
• DPDT switch (momentary most practical)
• Two 8 ohm speakers
• Your choice of enclosures
IN
OUT
Low gain BN-9
Remote
Local
3. Mini public address amplifier
Components required:
• 8 Ohm PA speaker or horn speaker
• 5K to 100K Potentiometer
• Electret microphone or other microphone
• 10K resistor for microphone
• .01uF Ceramic capacitor