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Here is a simple example how to build cool looking binary 24 hour clock. Red LEDs shows seconds, green LEDs minutes and yellow LEDs hours.
Case contains four buttons to adjust the time. Clock works with 9 volts.
This clock is easy to do and parts cost only few bucks, so it is also cheap to do.
Case contains four buttons to adjust the time. Clock works with 9 volts.
This clock is easy to do and parts cost only few bucks, so it is also cheap to do.
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Signing UpStep 1Schematic And Parts
I used the blue colored case, because it was cheap and looked good to my eyes.
Parts:
- Clock crystal (Q1) 32.768 kHz.
I think the easiest way to get that crystal is take it from the old wall clock.
- 560pF, 22pF capacitors and one 10M resistor
- 1 x 4060 IC, which is the 14bit ripple counter.
With 32.768 KHz clock crystal this IC gives 2Hz out from the pin number 3
- 3 x 4024 IC
This is 7bit ripple counter
- 2 x 4082 IC
Dual 4-input AND gate
- 1 x 2,1mm plugin
- 17 x led
Red, yellow, green or what ever you like
- 17 x 470 Ohm resistors
I used the 9 Volt supply, so the output from the pins is something around 9V. Typical forward
voltage for these LEDs are about 2 Volts. Let's want that, the current to the LED is something about
0,015 A = 15 mA, then (9-2)V / 0,015A = 466 Ohm -> 470 Ohm is size of resistors.
Now it's time to download 4020 14-stage ripple counter data sheet and we will find that, the
max output current is 4mA =), but it is enough and works anyway.
Parts:
- Clock crystal (Q1) 32.768 kHz.
I think the easiest way to get that crystal is take it from the old wall clock.
- 560pF, 22pF capacitors and one 10M resistor
- 1 x 4060 IC, which is the 14bit ripple counter.
With 32.768 KHz clock crystal this IC gives 2Hz out from the pin number 3
- 3 x 4024 IC
This is 7bit ripple counter
- 2 x 4082 IC
Dual 4-input AND gate
- 1 x 2,1mm plugin
- 17 x led
Red, yellow, green or what ever you like
- 17 x 470 Ohm resistors
I used the 9 Volt supply, so the output from the pins is something around 9V. Typical forward
voltage for these LEDs are about 2 Volts. Let's want that, the current to the LED is something about
0,015 A = 15 mA, then (9-2)V / 0,015A = 466 Ohm -> 470 Ohm is size of resistors.
Now it's time to download 4020 14-stage ripple counter data sheet and we will find that, the
max output current is 4mA =), but it is enough and works anyway.
| « Previous Step | Download PDFView All Steps | Next Step » |
I'm getting some skipped digits on the hours and minutes...I'm going to have to evaluate which digits and see if I can figure out what's causing it...but I'm very pleased with this circuit...I'm going to try and modify it to keep time with a watch battery and light the LED's with the 9V external power. Assuming the watch battery will power all of those CMOS IC's.
http://www.roleepolee.com/products/roleepolee/microswitch6167a.jpg
If so, how would the seconds 4024 counter get pulses when you release this button?
Thanks! Can't wait to build this!
I'm subbed.
http://czshare.com/1537052/9tM_/BINCLK.rar
Information inside of archive.
1,29 MB
build it and post pictures! i'll follow closely
I have remade the schematics, so they are readable and nice.
Improved some parts, days of month part still has binary counter, should have decadic.
For information, HH:MM:SS and DAYS OF MOTNH are binary, others decadic.
Here is the new version - 6B and 6C.
http://czshare.com/1559217/WAbQ/GEN6.rar
13,7 MB
If you want, download all versions here. Do not try to build the old ones!
http://czshare.com/1559205/F8Y_/BINARY_CLOCK.rar
55,2 MB - some artwork connected with it included
Look, I won't build it because of lack of time, money and existence of mistakes in design. At least not for now.
http://www.instructables.com/file/FZQILLUFIM95W1L/?size=LARGE
The way it work is you start with One then for the other you need to take the anwser of the last and multiplie it by two.
So the first led from right to left is
#1: 1
#2 : 1*2=2
#3 : 2*2=4
#4 :4*2=8
#5 :8*2=16
#6 :16*2=32
Then, for each lited LED, you add the values together.
So let's say the first, the third, the fourth and the sixth LEDS are lit.
#1 led=1
#3 led=4
#4 led=8
#6 led=32
1+4+8+32=45
Yellow is for hours
Green for minutes
and Red for seconds in this case.
so if:
Green #1,3,4 and 6 are lit
Red: #1 and 5 are lit
and Yellow 5 is lit.
Green: 1+4+8+32= 45 minutes
Red: 1+16=17 seconds
Yellow: 16 hour.
So it's 16:45:17 or 4:45:17 PM
:)
But why is your SEC led connection start on pin 11 while all others start on pin 12?
my clock is 180 times faster then it shude be :(
in 20 sec it pass 1 hour :)
what can be problem? :)
thx
for people that dont want a sec timer:
omit all the leds, in the sec IC, connect pins 3-6 to the and gate pins 2-5
people that want only a flashing second led:
omit all leds except the led on the 11 pin of the sec IC, connect pins 3-6 to the and gate pins 2-5
PULL_DOWN_SEC, PULL_DOWN_MIN, PULL_DOWN_HOUR are pull down resistors.
J1 is 2,1mm plug in. VDD is voltage and VSS is ground.
Hope it helped =)
http://www.seeedstudio.com/depot/images/product/MEC00035.JPG
and
http://www.seeedstudio.com/depot/index.php?main_page=popup_image&pID=250
Something like that.