I want to make a simple circuit. I want to connect a bulb, buzzer and switch to a battery. About the size we all used in science at school. When the switch is on, I want the buzzer and bulb to work together. Do I need to use resistors and transistors? I have no idea. Help!
Electronic – How to connect a bulb and buzzer to be operated by one switch
circuit-design
Related Solutions
This may be tricky as you have no circuit schematic and have provided no evidence of investigation.
Figure 1. A piezo oscillator circuit. Source: Electronice Circuits.
Suggested approach:
- Measure the voltage on each terminal of the piezo while silent.
- Measure the voltages while beeping.
Even with only a multimeter you should be able to detect a difference.
When you've found the one that oscillates you'll need to monitor that with your LED circuit. This may require a high impedance input to avoid loading the piezo so much that it doesn't work.
This is simply 3V batteries with LED and Current limiting switch with Diode OR logic. and a 3V Piezo Buzzer .
simulate this circuit – Schematic created using CircuitLab
- If White LEDs then no 50R resistor needed, if 3V battery max. If Red or Yellow 2~2.1V , 0.9V drop/50~18mA
Best Answer
You eventually need a lot more information in order to get an answer to this, but with the optimistic assumption that both the bulb and buzzer operate from the same voltage as the battery...
simulate this circuit – Schematic created using CircuitLab