- #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?![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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??![Roll Eyes :rolleyes: :rolleyes:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Thanks in advance![Smile :smile: :smile:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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