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Good Day,
I would like to ask for help in troubleshooting my exercise experiment. I was trying to show a message in my 8x2 LCD display LM016L. The message in 1st line should be " R2K Technology " and in 2nd line is " MCU - Trainers ". The 2nd line won't show but the first line showed however...
Queueing System Small Project need help "no MCUs nor PICs" just basic and special ICs
As what the title says, Im currently building the said small project named queueing system, which is just basically an up counter with window number. The output would be, an up counter from 00 to 99 (two 7...
Re: 60 seconds timer reset problem using 74192 & 7447 decoder
I did this but at first, it doesn't work, the ones minutes steps to 1 everytime it hits 40 seconds, so what I did, I applied the advice of SunnySkyguy and betwixtby putting pull down cap, ...and it works perfectly well. :)...
Hi Good Day
Thanks for stating the problems. Im now trying to fix the race glitch.
I did your advice but is was still the same. Yours was it only counts up to 39 then after that it reset back to 00:00, without counting up on the ones of minute. I tried changing the cap to 1nf, still the same...
I tried nand gate then connecting it to the load, still the same. Tried the 2 diodes and resistor pull up, still the same. did the 4017 ic but the MIN won't count up.
I tried..
, it went up to 59 then 00, but the "ONES" at minutes, the next counter won't count up. After 00:00:59, it just went...
How about the 4017 ic method? It does reset on 60 but doesn't count up the "ONES" place on the next 74192 ic.? any ideas?
Im a little confused. Im still a newbie. Do you have schematic for this? Thanks
Re: 60 seconds timer reset problem using 74192 & 7447 decoder
It's like this.
So once it reaches 6 with high on #2 and #4 bit. It should reset. It does but too early. Instead of 60. it resets to 40. And also, it does not count up the "ones" in the next counter ic.. after 00:00:39 it...
60 seconds timer reset problem using 74192 ic & 7447 decoder
I am building a digital clock timer using 74192 and 7447 decoder. Hertz is 1 (1 sec) clock. On proteus, on the tenth of seconds, i trapped the #2 and #4 bit which equals to 6 with AND gate then connected to reset of the 74192 so when...
Thank you very much, I was actually planning on putting my 7seg display on portb, but since, only portb.rb0 can read the pulses, would it be possible to make porta as an output instead, to display the 7seg display pulses? THanks
Hi, Good Day! This is my first post. I made a circuit which read pulses from a coinslot with the help of interrupts using pic16f877a 4mhz, im currently using rb0/portb.f0 to read the pulses, count them, and display in portd the number of pulses.
My question is, would it be possible if i change...
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