Electronics - Reverse Engineering & Improving!

Discussion in 'Modding and Hacking - Consoles and Electronics' started by davesandell, Jun 23, 2019.

  1. davesandell

    davesandell Active Member

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    Right so I've started on a little project to improve the flashing LEDs in use on my old VW Beetle....

    It operates on 6v DC...
    The PCB can be a maximum of 25mm long and 16mm wide to allow for clearance within the semaphore arm...
    Heat to be kept to a minimum - I don't want anything melting!

    It would be a bonus if it would work on both 6v and 12v - one less thing to worry about if I convert my car over to 12v!

    So lets begin with what is in place at the moment
    https://imgur.com/ufQwv4Z
    https://imgur.com/EcFKhb6
    I stripped the components off the board to reveal
    https://imgur.com/dbOzYNS
    https://imgur.com/DlqWml9
    This is getting somewhere near the design of the board....
    These are the components from both sides of the board...
    https://imgur.com/O6S8RTw

    So we have -
    4x LEDs (I'd like to identify what type they are...)
    D882 - NPN Transistor
    8 Pin IC - I would assume this to be a 555 timer - as the LEDs flash...
    2x KL4 - transistors
    Diode
    2x capacitors of unknown value
    4x resistors (102, 103, 2x 120)

    I then lightly sanded the board to remove the solder mask and reveal...
    https://imgur.com/af4tmkI
    https://imgur.com/d02FFrr

    I then got to work in my favourite image editing program - and traced the board and vias out to this....
    https://imgur.com/PoRjQ6O
    https://imgur.com/clD7ohK

    The board is the same way around in each picture for ease of recognising where everything goes....
    Ideally I want to drive an additional 4 LEDs from this arrangement - giving a total of 4 per side...
    Given the space requirements is this feesable? If not how else can this be improved?
    Im all ears while I get the design into a program so I can get some prototype boards produced!
     

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