breadboard-man
New Member
Hello to all, its my very first post and i just beggined in electronic.
I started one month ago when i looked at howstuffwork on electricity and got in love with it.
So i decided to make my first project a 1 to 100 counter .
The idea is simple(with a 5 volt dc supply):
555 timer---bcd binary counter--7 segment display decoder--7 segment display. (For units)
The 2nd display works the same way but get a 1/10 frequency then segment of units, so it count the ten's. ( i use a third 7490 to divide by ten)
I would need your advice, maybe i would need to put a capacitor somewhere but i dont know because i am a noob that just started and there may be some minor imperfection in the design(like no power supply to a chip)
I would need to know if the 7447 and 7490 chips still exist in the same format because the only datasheets that i founded where from 2000
Please answer me.
a noob
I started one month ago when i looked at howstuffwork on electricity and got in love with it.
So i decided to make my first project a 1 to 100 counter .
The idea is simple(with a 5 volt dc supply):
555 timer---bcd binary counter--7 segment display decoder--7 segment display. (For units)
The 2nd display works the same way but get a 1/10 frequency then segment of units, so it count the ten's. ( i use a third 7490 to divide by ten)
I would need your advice, maybe i would need to put a capacitor somewhere but i dont know because i am a noob that just started and there may be some minor imperfection in the design(like no power supply to a chip)
I would need to know if the 7447 and 7490 chips still exist in the same format because the only datasheets that i founded where from 2000
Please answer me.
a noob