| anonymous |
Help! Added 555 timer for this counter. |
Wednesday, September 23, 2009 1:34:16 AM |
| I built this circuit using 555 timer Astable as my pulse. My problem is that it skips numbers. Like it will count from 1 to 4 then 7 and back to 1. Some times its random numbers. I thought I might have had some bad chips but I replaced them with new ones. For the 555 timer I am using R1 10k R2 100k and 10uF for a frequency of .068Hz. Doesn't any body have any suggestion why this might be skipping numbers? |
| Danpher |
7 Segment LED Counter |
Monday, September 14, 2009 10:58:42 PM |
| i am about to design a 24-second shot clock using the seven-segment light emitting diode....if you have an idea on this matter, kindly send to me steps to be followed in makikng such device.... |
| nina |
7 Segment LED Counter |
Sunday, September 13, 2009 3:03:47 PM |
| hi!
i was just wondering, i am looking for a circuit that counts up to 12...can i get any help with that?..esp on how to expand this particular circuit to be able to do that. thanks! |
| chillychintu |
7 Segment LED display |
Sunday, September 13, 2009 3:35:59 AM |
| hey anyone know's how to display alphabets in common cathode seven segment display?
If yes then give me a brief description about it on my mail..
I will be really grateful |
| Ronald Cayne |
7 Segment LED Counter & Mercury Switch |
Saturday, September 12, 2009 2:40:56 PM |
| Hi There I am a real novice but want the following. Help would be greatly appreciated.
Can I use 12 V DC Circuit with this device? What alterations would be required. I am using a mercury switch and everytime the circuit closes even momentarily I want to record the count, Source is a 12VDC coming from my auto battery.
Please help as to where the various components can be purchased.
Thanks
Ron Cayne
|
| trevor |
double 7 Segment LED Counter |
Thursday, August 27, 2009 5:48:35 AM |
| i want to build counter circuit that counts to 108..using a toggle button it must increment by 1 everytime the button is pressed when entering and decrement by 1 everytime the button is pressed when exiting |
| rowan |
7 Segment LED Counter |
Friday, August 21, 2009 6:51:10 AM |
| michael, you must use a synchrous up/down bcd counter ic.. you can use a 74ls190.. you can check this link..
http://rowatronix.wordpress.com/2009/05/09/updown-counter-circuit/ |
| Michael |
7 Segment LED Counter |
Tuesday, July 07, 2009 11:27:59 PM |
| Would like to make a count up to 20 and down to 0 seven segment display using two manual momentary switches. any help would be appreciated. |
| fahim |
7 Segment LED Counter |
Tuesday, May 26, 2009 8:20:08 AM |
| i want conected 7447 with seven segment.
how do i that? |
| ginvin |
7 Segment LED Counter |
Wednesday, April 29, 2009 12:00:47 PM |
| I have a 12V DC fan motor, it have 3 wires, one of it, output the pulse width signal. Now I want to convert the pulse signal to speed (r.p.m) to show on 7 segment. How can I do it???
Thank you very much! |