FCALLBOX3 Display Box 

DISPLAY 8 DIGITS 5x7 matrix 5x7 BOARD

Description

The DISPLAY BOARD 5x7 for FCALLBOX DISPLAY is the part of display and electronic control.

Top view

bottom view

It includes :

- 8 display Led 5x7

- The shift registers.

- The drivers.

Below the diagram :

Schematic

- The display is multiplexed :

- The seven shift registers are loaded with the data to apply to the first columns on the first columns of the display.

- The anodes of the first columns of the eight displays are driven by the transistor PNP Q1, this displays all the first columns.

- Then, the seven shift registers are loaded with the data to apply to the seconds columns of the displays.

- Then the anodes of the second column of the eight displays are driven by transistor PNP Q2, this displays all the second columns.

- This is repeated with Q3 to Q5 to finally comes back to Q1.

Download here the schematic in PDF format

Bill of material

The bom below shows only the components to be placed.

face de dessus Ref Description Manufacturer / reference U0-U7 Alphanumic display 18mm 5x7 Kingbright ref : TA07-11EHWA or equivalent

face de dessous Ref Description Manufacturer / reference R0-R55 Resistor 220R 5% 0603 All brands R59-R63, Resistor 2.2KR 5% 0603 All brands C4-C7 Condensator 100nF 16V X7R All brands U8-U14 Integrated circuit 74HC164D SOIC14 All brands

PCB

- The board which has 100x35mm dimensions is a part of the PCB F00103 with 100x100mm dimensions.

- So, you need to cut it to get the PCB of the Display board.

Download the manufacturer files here

Assembly

The board has components on the two faces.

Download the views here in PDF format     

Copyright François Callanquin, October 2013

Contact : fcallbox@free.fr