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Logic Probe with a Paperclip
24 Hr Digital Clock only with basic CMOS Chips
Digital Calendar Clock made from CMOS Chips
i have s question you just show us how to make a calendar and how will it work because it is not connected to time so is it going to change automatically and in your pic you are showing the other side where the clock is how to make the clock you have not show us how to make the clock plz tell me show me give me the diagrams and the PCB art plz so i can make this for my school competition and plz answer my comment because i really need your help and if you are going to show me the clock plz tell me that how to connect them both so they can work easily and ya when you have done all your work in PCB then why wiring is at the upper side of it and really your idea is very good your work is also fabillous but i need a little help thx
Each resistor will be placed at the every output of the 4543 IC, connecting with its respective input at the 7-segment display. Use a 500Ω resistor for a bright display, or a 1000Ω resistor for a dimmer display. Not using any resistor will burn the display.
how the drop down resistors for each 7 segment display will be implemented ?will each resistor be implemented at the output and input of the 4543 ?
Thanks for your advice, but unfortunately the solution that you've kindly made don't seems to work. I've done a google search about that problem (how to avoid mechanical chatter or contact bounce) and I can't fix the problem with none of those I've tried. This picture is from the 1st clock that I've made, and the second one, that is not finished yet, has the same problem.Thanks again!Best wishes,Eduardo
I made it!
A small cap, maybe 0.1 microfarads in parallel with the switch should do the trick, mostly. Can you post a picture of the completed clock? I'd love to see :)
Made the circuit, works great! Can anyone please tell me how to avoid the push buttons mechanical chatter, so when they're depressed to set hour/minute, it will only increment 1 hour or 1 minute at a time? The problem is that for each button press, it is now incrementing more than 1 hour or minute...It's the only "problem" that I'm having. Thanks!
I think 1N4148 is fine for this circuit. Trust me.
Yeah. Of course you can. But you have to use also 4060 and JK or D FF to divide pulse to standard 1Hz for your circuit.
You can use CLK pulse from pin 9 of 2nd 4020 IC, through 1 or 2 Transistor connected series with LED. That'll make LED blink as you want.
Question: Is supplying the current from the +5V pin unwise? Isn't that a lot of current going through that one pin that could possibly destroy the Arduino's voltage regulator? Go through VIN instead?
and the input is it gonna be from oscilloscopeor just a 5v power supplyand i wanna know if i able to remove the oscillator and get the clock and the voltage from the oscilloscope?
http://www5.epsondevice.com/en/products/spxo_32khz... - Grimm6Jack
In the diagram you have the pins which are out to the 4020 or you can check it here:http://www5.epsondevice.com/en/products/spxo_32khz...About putting it on the breadboard, yes, you can solder some tin into the pins and put some wires and then put them in the breadboard, but it can have some bad contacts so be careful when soldering them. The SMD pins are very small as well which makes it even more difficulty. - Grimm6Jack
i want to know how to put the oscillator and the input could you please help me with this problem - MuhammadY34
please i want to know how you connect the crystal to the pcb ?and which program you use to make the pcb? - MuhammadY34
3 foot Enterprise NX-01 with custom electronics
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