Hi there people, im kinda new to electronics and i wnated to know some basic but cool projects, like for example the ''sound reactive'' LED's, i like a good lightshow, so if you could help me out with some light/LED projects i would be thankfull
P.S.: Here's the link for the sound reactive LED's project, its a mod for a PSP but i used it in computer speakers and it works pretty neat.
Cool one, i would be thankfull if you got me a schematic, i saw a guy on Utube who did one with rgb led, somthing like red for high tone,blue for low and green for mid tones, i might have the colours wrong though
It depends on what type of project is fun for you. At the moment I spend a little time each night to make a small rc car. To make rc stuff is fun for me, but probably not for you. Point is, it is difficult to suggest a intersting project if you don't specify what type of project you want to do.
well, im fascinated by lightshows and stuff like that,i would also like to try some project using a 555 timer just to understand how it works, also, any ideias on how to create an IR sender and a receiver to turn on and off a light?
The "sound reactive LEDs project" has the transistor connected upside-down because the author has the rounded side and the flat side of the TO-92 case mixed up and the transistor is connected like a PNP type but it is an NPN type.
Both wrong connections make it correct, excepy nothing limits the base current and nothing limits the LED current.
The "sound reactive LEDs project" has the transistor connected upside-down because the author has the rounded side and the flat side of the TO-92 case mixed up and the transistor is connected like a PNP type but it is an NPN type.
Both wrong connections make it correct, excepy nothing limits the base current and nothing limits the LED current.
well right or wrong, i connected that way and it works just fine, btw, i used 2 LED's in series for eache transistor, do you think it would be more sensitive if i used 1 transistor to each LED?
by more sensitive i mean, would it light up with less volume?
Without limiting the base current of the transistor with a resistor then the sound source (MP3 player?) and the transistor might burn out.
Without limiting the LED current with a resistor then the LED and the transistor might burn out.
Two LEDs being driven in series need an 8V power supply. One LED needs a 4V power supply. You have a 2V to 3V battery as a power supply so two LEDs in series will be dead.
do a search for computer christmas lights YouTube - rocking Salmon, Idaho lights
now theres a project!!
I am running 15,000 lights
I have added 255 levels of dimming as wel.
start out simple like an olsen 64 boardl
Without limiting the base current of the transistor with a resistor then the sound source (MP3 player?) and the transistor might burn out.
Without limiting the LED current with a resistor then the LED and the transistor might burn out.
Two LEDs being driven in series need an 8V power supply. One LED needs a 4V power supply. You have a 2V to 3V battery as a power supply so two LEDs in series will be dead.
actualy, the speakers are in a computer, and the source power is 9V, so it works just fine, and i actually have it done, why are you doubting that much? i was telling how i did, not how i was going to do OK?
There are hundreds of VU meter projects on the internet. All use the LM3015 LED bar graph driver IC. The datasheet of the LM3915 shows the schematic of an extremely simple VU meter.
There are hundreds of VU meter projects on the internet. All use the LM3015 LED bar graph driver IC. The datasheet of the LM3915 shows the schematic of an extremely simple VU meter.
thanks, and BTW, its good to talk to you without being arguing, and about the speakers, it works...I know it has got an higher voltage than reccomended, but because it is only 1 volt it works fine, when the LED's fry, i'll buy some new ones
the basic of VU meter is voltage driven detector driving a multi-stage voltage detector which in turn drives a switch-style LED signal driver. Mostly there are ICs for that which detects voltage(equals to sound/music amplitude mostly) and reacts accordingly(lighting up the appropriate level of LEDs).
For tone-based ones you might want to hook different tone-filter stages in-between the audio output and the voltage detector stage, so each bass/middle/treble range have its own set of VU meter.