cheap toy organ but want flash

[MrDEB]

Here is a basic toy organ that my cub scouts are going to build using female header plugs (got 50+ for free) pcboards, 8 pin dip socket. really cheap speaker from Goldmine.
In theory it will work but I also have 500 LEDs coming my way as well but trying to come up with a way to include numerous LEDs in this circuit
any ideas?

 

[audioguru]

I always thought that an organ produces music, not just non-musical buzzing beeps at various unrelated frequencies.

 

[gabeNC]

Audioguru, obviously you haven't been watching MTV lately.


MrDeb: Since you have a switch for each "note", why not tie a LED with it? Make each note light up as they press it.

 

[MrDEB]

thats what I was thinking but the leds won't come on using the 10k resistors. ??
my other problem is why the LT spice dosn't show my square wave?

 

[MrDEB]

LT spice circuit

no square wave out of pin 3??
must have missed something?
Audioguru remember these are 6-9 year old kids. They tore apart 2 computers yesterday and had los of fun.
I just received my shipment of LEDs and switches (not real overjoyed with switches but will make do)
now just need a quick solution to get the leds included so I can order parts for next Monday

 

[MrDEB]

crazy idea I have

maybe won't even work but?
thats why I like simulating a circuit but can't get a square wave out f LT spice?
wanting, lookng for quick suggestions as I need to keep as cheap and easy as possable

 

[audioguru]

Your buzzer circuit doesn't buzz because you have pin 5 of the 555 shorted to the positive supply. Leave pin 5 unconnected.

When I was 8 years old I played the piano and made real music, not just buzzing noises.
My kids played a Casio music synthesizer keyboard when they were 8 years old.

 

[ghostman11]

Mr Deb my boy is in the scouts (hes 9) its always fantastic to see volunteers for this sort of thing putting so much effort into what is a unpaid role! i know that when our boy does stuff like this at scouts he absolutely loves it. well done mate people like you make a difference and to be honest i doubt the kids will care what sound comes out i think they will be thrilled just to make it work

 

[MrDEB]

THANKS I enjoy the time spent with the scouts.
This gizmo is really got me perplexed. there has to be a way to make the buttons change the resistor values as well as light up a separate LED.
I played with diodes in different arrangements but?

 

[MrDEB]

well I am thinking one or the other
blinking LEDS (pushing buttons and turning on an LED) or making sound unless someone can come up with a solution.
I got it where the LEDs are n the circuit but only drawing PA=really dim leds

 

[ghostman11]

i am too much of a noob to offer much help but i would go for sound with kids, i am thinking it must be possiable to do cheap stuff like alter the resistance but holding both ends of a wire and using there bodys as a giant resistor therby altering the noise diff kids are bound to make a diff noise! of course i could be talking absolute rubish but i like the therory plus if that works then water with and without stuff added like salt/sugar etc could also be used.........................anyway i best shut up as i have no idea what i am talking about keep up the good work

 

[MrDEB]

revised schematic

I added an LED to output along with a 50ohm resistor to lower volume and limit the output current (don't want the 555 to fry)
any suggestions as I need to get pc boards and parts ordered
link to speaker, not much to look at but ??
Flat 0.83" Dia. Speaker (Pkg of 10)-The Electronic Goldmine

 

[MrDEB]

talk about a challenge!!

it would be simple to just layout a pc board but using 11 pin female header plugs so the scouts can insert the different components is really a challenge.
after I get a layout I need someone to direct me to a program that lays out the componets using the resistor color codes, components outline etc. Have seen several posted with color etc.
have a pretty good layout designed but waiting for parts to be sure.