| T O P I C R E V I E W |
| Darkthero |
Posted - Nov 18 2009 : 7:08:57 PM
Hey i found a video of a amp useing only a 555 but he dosnt post a schematic or will send me it, so i was wondering if someone knew how to do this and had a pic online of it.
Here is the vid http://www.youtube.com/watch?v=fvOSWekG7sY
This will be a cool project cause most people dont know a 555 can be used like this. |
| 11 L A T E S T R E P L I E S (Newest First) |
| Darkthero |
Posted - Nov 24 2009 : 2:34:31 PM
kk thx |
| audioguru |
Posted - Nov 24 2009 : 08:42:24 AM
Use an LM386 or a TDA2822M amplifier IC. |
| Darkthero |
Posted - Nov 23 2009 : 9:46:49 PM
sorry im not good at explaining things. just a simple amp will be fine. |
| audioguru |
Posted - Nov 23 2009 : 9:28:11 PM
Double the volume of what?
Since your hearing's response to loudness is logarithmic then you need 10 times the power to sound twice as loud. Double the power is only a little bit louder. |
| Darkthero |
Posted - Nov 23 2009 : 6:22:36 PM
ok well since i cant get this one working, anyone have a simple amp schematic? i just need to double the volume. |
| Darkthero |
Posted - Nov 21 2009 : 11:20:08 PM
nope dosnt work |
| Darkthero |
Posted - Nov 19 2009 : 11:06:29 PM
OKay here it is. think it will work? http://www.mediafire.com/i/?zlhm2wvjlnz |
| Darkthero |
Posted - Nov 19 2009 : 12:46:00 PM
Okay ill post a schematic and see what yall think, if i need any fixes for it. |
| audioguru |
Posted - Nov 18 2009 : 11:18:44 PM
Look up class-D audio amplifier. Then adapt the PWM or PPM circuit in the 555's datasheet to do it. |
| Darkthero |
Posted - Nov 18 2009 : 8:26:11 PM
Hm thanks. thanks good info to know. but i would still like to have the schematic to build it for fun. |
| audioguru |
Posted - Nov 18 2009 : 7:58:51 PM
The datasheet for the 555 shows how it can do PWM.
But its max current is 200mA so the output into an 8 ohm speaker is only 0.16W. A cheap clock radio is 0.5W. |
