Hello,
I want to follow the schematic below:
My speaker is a 1W 8omega speaker. Is it safe to follow?
My speaker is a 1W 8omega speaker. Is it safe to follow?
No.
You may very well burn your arduino (pwm port and regulator) and your transistor....
A transistor should have a base resistor.
Arduino regulator cannot deliver the current that runs through a 8 ohm resistor...
Would a 0.25w speaker be ok?
Yes, if You connect like this, not applying any power to the system. Else, the answer is: No.
No.
The power is just how much power the speaker can handle.
It's the impedance (resistance) that's the problem: 5V into 8 ohms will give 800 mA - way too much for an AVR port pin!!
1 Like
What kind of speaker would be appropriate?
what are you trying to do with it?
Play sounds/music with an SD card module. Also, an alarm, using an RTC
You need an amplifier.
There are cheap boards that can power an 8 ohm speaker. You will also need an adequate power supply...
2 Likes
I've seen someone on youtube doing this without any amplifier, they recommended this speaker: https://www.amazon.co.uk/dp/B07DTFX76C/ref=as_li_qf_asin_il_tl?ie=UTF8&linkId=3de903bc505509d05b4f3aa802e18e4f&creativeASIN=B01CHYIU26&creative=9325
That is even worse...
2 Likes
That's the trouble with videos - you don't get the smell of the burning chips!
2 Likes
At least you can see the smoke….
No fumes:
Better health.
1 Like
If you put a 220 resistor in series with the speaker, you can connect directly to an UNO digital pin
Be a bit quiet tho !
1 Like
You mean 8 ohm speaker - omega is the symbol for ohm.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.