Acidmods

Console Modding------ ( Here you can talk about your favorite Consoles ) => PSP's => PSP Phat (1000) => Topic started by: DaveBere on February 14, 2008, 05:00:53 AM

Title: sound reactive mod question
Post by: DaveBere on February 14, 2008, 05:00:53 AM

Hello,

I am doing my first sound reactive mod as outlined in the tutorial and wiki
Can somebody tell me if resistors are needed from the supply voltage to the LED's from pin 6 of the LM386 Audio Amplifier IC.
I am using red and white LED's.

Thanks,

Davebere.

Title: Re: sound reactive mod question
Post by: whitetop on February 14, 2008, 07:36:39 AM

i really think a resistor depends on how many leds but i dont know

Title: Re: sound reactive mod question
Post by: DaveBere on February 15, 2008, 06:47:52 PM

Thanks for trying to help whitetop.

Can anybody tell me what the peak voltage output is ?
I have measured 2.25. I did not use resistors and my red LED's keep burning out.

EDIT: Well I guess I will try a 22 OHM resistor.

Title: Re: sound reactive mod question
Post by: whitetop on February 15, 2008, 07:32:46 PM

well i was told to use a 10ohm resister

Title: Re: sound reactive mod question
Post by: DaveBere on February 15, 2008, 08:51:25 PM

based on the peak voltage I measured (2.25) and the 1.7 max  votage recomended for red LED's the calculator gave me 22 ohm's.

Title: Re: sound reactive mod question
Post by: whitetop on February 15, 2008, 09:43:37 PM

well im doing a trigger mod just with 2 blue leds and 4dp said i had to use a 10ohm resister