Scoreboard

Description

This is an ongoing project for 3 yrs. This project contains a 555 timer which the output connects to the CLK pin of the asynchronous bidirectional counter. The output of the counter goes to the input of the 7 segment latch decoder. Each pins of the output goes through a 680 ohms resistor and to the 7 segment cathode display.
The counting is dictated by two buttons which are connected to ground and contains a pull up resistor. Both buttons goes through the XOR gate and to the ENT pin of the counter which dictates whether to enable counting or not. One of the buttons goes through the NOT gate and to the input of the OR gate while the other buttons go to the input of the OR gate. The output of the OR gate goes to the UP/DOWN pin of the counter.

Files

Gerber_Scoreboard.zip

PCB File

x-zip-compressed - 84.79 kB - 03/27/2021 at 17:21

Download

Schematic_Scoreboard_2021-03-27.pdf

Updated schematic 3/27/2021

Adobe Portable Document Format - 93.16 kB - 03/27/2021 at 17:21

Preview

Schematic_Scoreboard_Sheet_1_20200211152921.png

Updated schematic

Portable Network Graphics (PNG) - 135.19 kB - 02/11/2020 at 20:33

Preview

Scoreboard_Schematic.pdf

First Schematic from 3 yrs ago

Adobe Portable Document Format - 47.50 kB - 01/25/2020 at 18:33

Preview

Project Logs

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Update on the Scoreboard
George Ebeid • 03/27/2021 at 17:28 • 0 comments

Hey Guys,
I have finally updated the scoreboard schematic to make it accurate and correct. Here it is:
Update on Scoreboard
George Ebeid • 04/12/2020 at 20:32 • 0 comments

The PCB part of the scoreboard is still in progress. A few weeks ago I got the PCB board and soldered all of my components on to the PCB board. Unfortunately it did not work and realized I made a mistake on the schematic. So I fixed it and could not buy it because of the Corona Virus in China (I used JLCPCB to buy PCB board). I am fairly new to PCB board and still learning it to this day. I also am trying to fix the PCB board to see if the functionality worked. I suspect that I arranged the switches wrong. However, where I live, it is cold outside so I cannot open the windows, which leads me into a stand still.
I want to give you guys an update and sorry for putting you guys in the dark.
I will give you updates as soon as the corona virus is done and I managed to fix my mistake.
Scoreboard - Updated Schematic
George Ebeid • 02/11/2020 at 20:37 • 0 comments

I drew up a schematic for the scoreboard. Here it is. I have come a long way in drawing schematics.

[Edited] I have not put in the PCB board yet. I have changed the schematic but I will put it in a different log once I tested it and confirmed that the design worked.
2/8/2020 - The Project Finale
George Ebeid • 02/09/2020 at 00:04 • 0 comments

I have stayed up until 1:30am which is last morning to figure out how to get the scoreboard to transition from 9 to 0 and vise versa. at first I used a bunch of logic gates and a flip flop at first but it is all in vain. Then I realized that I was overthinking this process. I need only 4 logic gates and three output with the first output at the and gate and the fifth output at the load pin of the sn74ls169bn. I did trial and error and intuition to get the logic output right. I test it out and it worked. This is the last part of which I want to implement into the circuit. All I need to do is to draw the schematic and the PCB board.

Here is the video of the circuit:

Here are images of the circuit:
progress this far
George Ebeid • 01/29/2020 at 21:17 • 0 comments

Scoreboard