The 74LS47 is a driver for the display. The 74LS192 is an up/down counter which you want to use in its BCD mode, which then will drive the 74LS47 to display the count. Look at the data sheets for these to determine how to use them. After you've looked at these, ask some more questions. We're here to help you with the design, not do it for you. You'll stay a noob forever, if you don't try to do the design yourself.
The 74LS47 is a driver for the display. The 74LS192 is an up/down counter which you want to use in its BCD mode, which then will drive the 74LS47 to display the count. Look at the data sheets for these to determine how to use them. After you've looked at these, ask some more questions. We're here to help you with the design, not do it for you. You'll stay a noob forever, if you don't try to do the design yourself.
here is a design i found, will this work?
i understand that between the display and the 74LS192 is the 74LS47.. i already have the idea how to connect them.. my problem is just the switches.. to make it go up when i push a button, or go down.
You must have the LS47 between the LS192 outputs and the LED display.
I would also recommend you add 'noise' suppression filters to up/down switches as switch bounce will cause miscounts.
I made a revision on the circuit. Will this work? And what kind of switch should be used? Is my connection for the switch proper to make it count up or down? Thank you so much!
I made a revision on the circuit. Will this work? And what kind of switch should be used? Is my connection for the switch proper to make it count up or down? Thank you so much!View attachment 40874
thank you very much sir eric. i will do diagram you posted.. if there will be any problem, i hope you are still there.. God bless! by the way, what kind of switch is appropriate for the colored diagram? it only uses 1 switch for the counting, am right sir?
thank you very much sir eric. i will do diagram you posted.. if there will be any problem, i hope you are still there.. God bless! by the way, what kind of switch is appropriate for the colored diagram? it only uses 1 switch for the counting, am right sir?
hi,
You need at least 2 push button switches, one for UP and one for DOWN count.
I have added a 3rd CLEAR push button, if you need to add a LOAD button later on, use the PL pin.
The 74LS14 will debounce the switch contacts, so that you will not get multiple counts when the buttons are pressed.
sir i just have questions, is there a difference between 74LS247 and 74LS47? or they are just the same? and in the diagram, 100n means capacitor? sorry sir i just have a little knowledge about electronics..
sir i just have questions, is there a difference between 74LS247 and 74LS47? or they are just the same? and in the diagram, 100n means capacitor? sorry sir i just have a little knowledge about electronics..
thanks for the info sir..
im pressing both switch (one at a time) up or down.. yes i used the circuit you provided..
im using 3pcs AA batteries (1.5v ea total of 4.5v), is that ok sir?
thanks for the info sir..
im pressing both switch (one at a time) up or down.. yes i used the circuit you provided..
im using 3pcs AA batteries (1.5v ea total of 4.5v), is that ok sir?
OK.
Connect the cathode of the LED [thats the Bar] to 0V on your pcb.
Connect the 470R to the Anode of the LED, at the other end of the 470R connect a short piece of insulated wire, about 10inches should be OK.
Bare about 5mm of the wire end.
Power up the PCB, you can now use the wire end to test different parts of the PCB.
If the voltage is +5V the LED will light bright, if low it will not light.
Test the voltages [using the LED wire] and see what the 74LS14 pins # 4, 8 and 10 show,,, let me know.