- #1
sci-phy
- 17
- 0
Hi,
An electronics newbie here..
I'm trying to produce sound using a 555 timer. When I tried using the schematic(attached file), a definite sound came. But when I removed the capacitor C2 in the circuit, the sound (amplitude) actually increased! Why does this happen? Why then, do we use a capacitor before the speaker?
One more thing.. Why do we need the resistor R2 from the transistor to the ground? When I removed the resistance, it doesn't seem to work. Why is that so? Isn't the emitter terminal connected to the ground through the speaker??
Thanks in advance
An electronics newbie here..
I'm trying to produce sound using a 555 timer. When I tried using the schematic(attached file), a definite sound came. But when I removed the capacitor C2 in the circuit, the sound (amplitude) actually increased! Why does this happen? Why then, do we use a capacitor before the speaker?
One more thing.. Why do we need the resistor R2 from the transistor to the ground? When I removed the resistance, it doesn't seem to work. Why is that so? Isn't the emitter terminal connected to the ground through the speaker??
Thanks in advance