Electronic Display Board with 4" inches

[goslock]

Well I have just finished a project that I ordered for an electronic board, which will serve for the indication of tank mixing and production lines in a company here in my country, the project fairly economical with regard to buy the board already done.

The board has two base stations for entering changes which is at the second level of the plant and the remote station which is at a distance of approximately 20 meters which is located on the first level. The operator can send two changes at the same time (tank - line). The communication between the two bases is serial cable with a length of 25 metres each station has the following features:

Base Station
       * 2 x 20 LCD display for the data entered
       * Keyboard 4 x 4 matrix for entry operator
       * PIC16F877 and brain.
     
Remote Station
       * 2 x 20 LCD display for the data entered
       * Keyboard 4 x 4 matrix for entry operator
       * PIC16F877 and brain.
       * Siren for the indication has been received that a change
       * 8 display 7 segments 4"

Hen I planted the project, the question menera making each separate part of the plate pic and the party power to the union used straps with IDC connectors 20 and 10 pin terminals besides 2 to coneciones supply and alarm.

The operation is simple operator to enter any changes must enter a 4-digit password which can be changed without any clear poblema before entering the key today. Good entering the key, then asks you to enter the number of tank (2 digits) and then the number of line (2 digits), then shows you to confirm or reject the changes. If these are sent remote station receives them and trigger the siren for a time of 25 seconds or turns off if the operator enters its key at the remote station to watch the change received this key also is 4 digits. The operator can make mistakes just 3 times if you enter the wrong password, but the station remotely send an error to the base station and this will have to re-enter the change until they receive from the operator correctly. Well more or less works well leave them some pictures and some videos of the board. Greetings to all and good luck







Here video

Video 1
Video 2

At the moment I am working on a clock
    * DS1307
    * 16F88
    * 4 Dispaly  4" inch
    * LM35 (Temperature meter)

[smainj]

no code no schema
what is the utility of this topic

 

[sohel]

he want to introduce himself. or advertisement

[goslock]

First presentation  , if someone is interested to ask

[pouchito]

nice project dude:)
thanks for sharing but pls can you provide the code or the hex so we will be able to test it ?

[smainj]

yes nice project but the display system is not very good
why you don't have used like this schema

it is more easy to build and low cost

[goslock]

yes nice project but the display system is not very good
why you don't have used like this schema
it is more easy to build and low cost

You have reason in the diagram is easier multiplexed, but I forgot to add that in the second diagram, just what use to simulate as it does not include ahi the power part because the display work from 7 to 9 volts and try to use multiplexacion but had some problems with the sampling keyboard as input data, why use the records and then hand power to ULN2803. That was the reason.

[krumper88]

Where did you get the 4" displays?