Hi

[FatChina]

can anyone tell me if there is a schematic for a binary digital clock using a 555 timer cause i didnt find any using the search.

 

[dknguyen]

You need a lot more than a 555 timer to make a working clock. In the same way that you need a lot more to make a watch than just a quartz crystal.

 

[Krumlink]

A 555 timer is useless if you want to read time. You would not want to go to school a early 10 minutes after you set it a hour ago! 555 timers are horrible, but fun.

 

[FatChina]

hmm i thought you could make a binary clock with 555 timers =(

 

[mneary]

hmm i thought you could make a binary clock with 555 timers =(

You certainly can! But 5% accuracy (pretty good for a 555 circuit) has an error up to three minutes per hour.

 

[FatChina]

would you happen to have a schematic? =)

 

[mneary]

would you happen to have a schematic? =)

You can show a clock with a 5% accuracy, but I expect anyone else would be ashamed!

 

[FatChina]

maybe a counter with minutes and seconds only? =S

 

[Roff]

Get a binary clock schematic off the internet, and replace the crystal oscillator with a 555 oscillator. If you don't know how to design the 555 oscillator, there are plenty of 555 tutorials on the internet.

 

[FatChina]

a binary clock with minutes and seconds only using a 555 timer with 12+ nodes

 

[Roff]

a binary clock with minutes and seconds only using a 555 timer with 12+ nodes

Have you actually done a search? Here is the first page of Google's results.

 

[FatChina]

im not a good googler

 

[Roff]

im not a good googler

Perhaps this would be a good time to learn.
See, the problem is, no one here is likely to have exactly what you need on their personal computer. We are going to have to Google it. You might as well do it yourself.
EDIT: A Google image search for "binary clock schematic" gives absolutely thrilling results.

 

[FatChina]

alright i found what i wanted.. but i dont know the other half

**broken link removed**

IC6???

 

[Roff]

alright i found what i wanted.. but i dont know the other half

**broken link removed**

IC6???

That circuit syncs up a 555 to the AC line, then divides it by 60 to give you a 1Hz clock. If the AC line fails, the 555 will continue to oscillate at close to 60Hz, so your time is not too far off when the power comes back on. Is that what you want, or do you just want a 555 running at 1Hz?

 

[FatChina]

just the 555 running at 1hz

 

[Roff]

just the 555 running at 1hz

Try to get a multi-turn trim pot if you can. It will give you better settability.

 

[blueroomelectronics]

Well it IS a binary clock, the OP never said how many digits.

 

[Roff]

Well it IS a binary clock, the OP never said how many digits.

Well, he did say

a binary clock with minutes and seconds only using a 555 timer with 12+ nodes

Not sure what the 12+ nodes is all about. Sounds like homework.