This is a COMMON CATHODE seven-segment display made with 29 pieces of 5mm LEDs. There is also a driver for this display. This can be a good experiment for students who want to learn how a seven-segment display and its driver work. The display driver is made using CD4026 which has been used several times in our previous up counter modules.
The driver is basically an up counter. After you insert the display into the headers of the driver and power it up, just press the COUNT switch to increase the count.
It works like any other seven-segment displays. I have designed a CD4026b based driver also. The seven-segment display fits into the headers of the driver and you can immediately test it. The driver is an up counter. Simply power up the display and test it.
Schematic of common cathode seven segments display:
Schematic of the common cathode seven-segment display driver
The driver and seven-segment displays are theoretically similar to our CD4026 based up counter or common cathode driver.
Components required to build this seven-segment display
- 29 x LEDs.
- 2 x 5 pin header
- 2 x 5 pins male headers
Components required to build the driver for the seven segments display:
- 1 x PCB
- 2 x 5 pins female headers
- 2 x 2 pins headers
- 2 x tactile switches
- 1 x 3mm LED
- 1 x Screw terminal
- 1 x 16 pin IC socket
- 1 x CD4026 up counter chip
- 3 x 10K resistors
- 1 x 1K resistors
- 1 x PC817 optocoupler
- 1 x 101J resistor network array
- 7 x BC547 NPN transistors
- 2 x 4 pins angle header (this is optional, you would need this if you want to concatenate other drivers)
You will need a 9V power supply to operate the driver.
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1.8″ Photoresistor And Laser Operated Medium Digital Objects CounterUS $24.95Add to cart
2.3″ common cathode seven segment display driverUS $11.95 – US $12.95Select options
2.3″ common cathode seven segment display driverUS $11.95 – US $12.95
This is a CD4026 based up counter driver module for driving 2.3 inches common cathode seven segment display. The module has headers on two sides to receive up count signals and to concatenate with another driver module.
The module can be triggered with NE555, flashing LED, and Arduino. It can also be triggered by anything that generates a clock pulse.
CD4026- 1 Digit Up Counter ModuleUS $4.95Add to cart
CD4026- 1 Digit Up Counter ModuleUS $4.95
- It works as an UP counter. You can instantly test the up count of the display using a flashing LED.
- It is a handy tester for 0.56″ seven segments common cathode display.
- Works with Arduino or NE55 or whatever that gives pulse.
- You can concatenate as many displays as you want.
- With this, you can build your own digital objects counter.
- Size: 15mmx49mm
50 in stock
Photoresistor And Laser Operated Large Digital Objects Counter With 2.3″ DisplaysUS $29.95Add to cart
Photoresistor And Laser Operated Large Digital Objects Counter With 2.3″ DisplaysUS $29.95
A laser light module illuminates the photoresistor continuously and whenever any object obstructs the laser light falling on the photoresistor, the counter increases the count. You can use this 3 digit digital objects counter for counting objects or people entering a room. It can be used by engineers for learning about digital counters.
4 in stock