Hi all,
I've been looking into how to make a simple amplifier for a laptop speaker system, as I can't find a kit (yes, I'm a newbie) that would suit my needs.
I need to build an amplifier that can supply roughly 5-7W per channel, and can run off my laptop's 19V power brick. It'll be 2.1, as the system has got a bass speaker to fill in the low range, which makes things a little bit more complicated (to my eyes, anyway).
My idea was to have a stereo amp power the mid/tweeters, and have that signal also mixed down into mono (see below) and going into another amplifier (this one mono, and more powerful) for the bass speaker.
Obviously, the bass speaker needs to have only low frequencies pass through (as well as being mixed). I'll be doing this by using a simple (and probably inefficient) way:
It does work really well though, and the frequency cut off is PERFECT for the bass speaker I'm using.
So, basically I'm wondering if anyone has any simple circuit recommendations for both a stereo, and a mono amp that can run off 19v? The last time I made a circuit from scratch it didn't work properly, which is why I'm looking for something simple.
Thanks!
I've been looking into how to make a simple amplifier for a laptop speaker system, as I can't find a kit (yes, I'm a newbie) that would suit my needs.
I need to build an amplifier that can supply roughly 5-7W per channel, and can run off my laptop's 19V power brick. It'll be 2.1, as the system has got a bass speaker to fill in the low range, which makes things a little bit more complicated (to my eyes, anyway).
My idea was to have a stereo amp power the mid/tweeters, and have that signal also mixed down into mono (see below) and going into another amplifier (this one mono, and more powerful) for the bass speaker.
Obviously, the bass speaker needs to have only low frequencies pass through (as well as being mixed). I'll be doing this by using a simple (and probably inefficient) way:
Code:
left channel from stereo amp-----\/\/\/\----
1k |
|-------------------- positive to mono amp
| |+
right channel from stereo amp----\/\/\/\---- 10uF
1k |-
|
ground --------------------------------- ground
It does work really well though, and the frequency cut off is PERFECT for the bass speaker I'm using.
So, basically I'm wondering if anyone has any simple circuit recommendations for both a stereo, and a mono amp that can run off 19v? The last time I made a circuit from scratch it didn't work properly, which is why I'm looking for something simple.