LM78xx Regulator PCB for cost of an SASE

Discussion in 'General Electronics Chat' started by tracecom, Apr 12, 2012.

  1. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
    I recently laid out a PCB for the LM78xx voltage regulator shown in the attached schematic. A bare PCB and a populated PCB are shown in the attached photo. I made two mistakes in the layout. The first was an incorrect footprint for the power input jack, J1. The second was a mistake in the silk screen outline for the LM78xx regulator: I showed the regulator rotated 180° from what it should be.

    The photo shows the regulator installed correctly, and the circuit functions properly. The power input jack is not installed because the footprint is wrong, but the power input terminal block, TB1, functions as designed. Thus, despite the two errors, the PCB is functional.

    I am ordering corrected PCB's, and rather than discard these defectives, I decided to offer them to AAC members for the cost of an SASE. I have 8 bare PCB's to give away; please PM me if you want one. Please post as soon as you have sent a PM. First 8 PM's get one.

    ETA: I guess I actually made another mistake. The regulator is labeled U2 on the PCB, but should be U1.
    Last edited: Apr 12, 2012
  2. CircuitRFQ

    New Member

    Apr 6, 2011
    Have you thought just doing some rework yourself instead of ordering new PCBs? But if you need a place to order them, let me know :)
  3. KJ6EAD

    AAC Fanatic!

    Apr 30, 2011
    I have requested a board.
  4. nerdegutta


    Dec 15, 2009
    Nice boards!

    What are the dimensions?
  5. tracecom

    Thread Starter AAC Fanatic!

    Apr 16, 2010
    1.95" x 1.45"
    nerdegutta likes this.