i have old IC LM 3900 , is that quad OP AMP ?.. okey then i want make it small VU LED meter use only 4 LEDs.
Need scheme ? sorry it's only draft, i edited from LM3915 scheme..

Protoboard

NOT YET BUILD.

LED audio meter using LB 1403

scheme :
try find yourself :)

FInished project :

Independent day

Our Nation celebreate Independent Day at 17 August, What a fenomena, about late of '90 There are something new idea to put bulb light 220 Volt sequentialy at Line. Vertical line with colorfull bulblight, put at your fences. I did take pic that day. You can imagine the power comsumtion about 5 Watt multiply 20 pcs equal 100 Watt. bright enough to glow your home. I plan to make it flickering with simply relay and IC 555 Timer. Until now, the dream does not come true :-(. Anyone can provide me the scheme circuit of that?

Auto Light

Here my own story, i bought auto light controller, Simple work, "off" at day, "on" at night. You must set switch turn on so that device will work 24 hours. Just plug and add to your socket of ordinary light bulb. Now my home will goes on, even i come home latelty cause busy hour and work overtime.

Var Pattern Matrix LED8x8

Visit www.Dharmanitech.com lately i found and interest project. Microproccesor, before do that i must understand how the memory work dan microcontroller programming. there are many project about matrix LED, Display Variable Pattern via 8x8 LED Matrix. Controlled by microchip PIC, ATMEL, etc.
my plan is creating an used EEPROM to display 8x8 LED, use multiplexer counter to represent 8 coloums. bob blick did that. i want make it too.

BillBowden LED Clock 4017

Refer to BillBowden design i interest to build that cute LED Clock, In my new rent home don't have big clock too see, i only see the number of time in southeast corner of my laptop or my handphone.
Prepare for shopping...

i imagine my design like this :

Digital Clock with Matrix LED

beginwords
Seven Segmen LED versus 5x5 Matrix LED ? hmm
After i made Digital Clock with Seven Segmen LED
i become bored when i saw it, too old fashion.
remind me since 1999 i bought it,
nothing change. Now, below is my dream story...

the idea is using 5x5 LED is more interesting
u can choose Blue and White LED colors. want more?
sure, u need more money. get some first !!!
Here some sample of number formation

O  OOOOO       OOOOO  OOOOO
O  O   O   O   O   O      O
O  O   O       O   O  OOOOO
O  O   O   O   O   O      O
O  OOOOO       OOOOO  OOOOO

can u read it? it's 10:03. Still cannot read?
i think u must increase to 8x8 matrix led.
anyway image that LEDs put in Plastic Tube, Cool...
need buy cheap memory to keep that simple shape.
hmm.. i'm confusing with design 27c512 help me!!!

example input is abcd binarycode :
0000=0, 0001=1, 0010=2, 0011=3, ...
U should get this knowledge from your school
but still need ic4518 counter to complete thatwork
try design like use ic4026 decade decoder counter.
scanning coloums still needed.
to scan 0 1 2 and 3 coloums for Matrix LED
i think... somehow i cannot figure that.

endwords
u only make 3 duplicate of them.
two minuteSegmen and one piece hourSegmen.
10/11 hour use 5 led only to show "1-"
come on make it, put the quote:
"it's gift for yours girlfriend"

add note : u can redesign new fontface..
and rewrite/flash again to that eprom.
here the example i get from youtube:

FAQ:
Q:why U don't use 24c256 serial eprom?
A:Hmm.. Not yet,Perhaps U design it for me.
at this time i still tryhard to findout
which one : A0,A1,A2,GND,SDA,SCL,WP,VCC :-)
i preffer use 27c512 drive with 4040

Q:How to put data in my EEPROM ?
A:u need PC, software, and interface.
someone else, could u help me, how is interface?

Q:What is EEPROM?
A:Electric Eraseable Program ReadOnly Memory.???

Q:where is complete sheme?
A:soon, if i'm not lazy or get it from other planet.