555 timer, 4 bit counter, 7 segment display

[arashiiskato]

3 protoboards? i only used 1 lol

[fromtheinsides]

HD?



[kayzer012]

you dont need that much wires you know!

[happyapple7]

This project its a classic among TTLs and CMOS books out there. Nicely done. Video quality its not so good though.

[FORDGTFANATIC]

how would i make a circuit for sequential leds on a tail light?

[moocowisback]

I did it but added 4 LED's to show the counting in binary...

[reviathon360]

who put what in where now?

[marjanVU1]

do you any kind of schema?i would be very grateful to you..:)

[marjanVU1]

do you have any kind of schema?im having problem with join two counter together..i would be very grateful...:)

[Elunalovesbourbon]

i dont get it, how do you know what pin to connect with what?

[beefviper]

You lookup the chip, and the pinouts on them. And decide what kinda functionality you want... for something like the 7447 (BCD to 7-segment display driver), it's pretty clear what pins goes where, if you want to see the numbers properly.

For something like the 7493 (4 bit counter), you can use an AND gate like I did, to reset it at any number you want, you just need to know what pins are high for the number you want.

[kanton4o]

all u need is a 74LS47, 74LS90, and a 555 timer

[beefviper]

I'm sure that's true. But I just assembled it with whatever I had laying around.

[friedrice60]

very nice quality video

[beefviper]

The camera cost $10, what do you expect? hehe

[Jackziom]

@friedrice60 yeah its a FULL xD

[geer789]

easy!

[beefviper]

Extremely easy.

[beefviper]

I used a 4 bit counter, then used an AND gate that triggered the counter RESET at 10.

[jadeotic]

wat ic numbr u use?????

[beefviper]

I just grabbed some standard 74xx series ICs that I had laying around...

7493 - 4 bit counter

7408 - quad 2 input AND gate

7447 - BCD to 7-segment display driver

and a 555 timer.