I'd like to add the SL CF ext beeper to an older CF PCB - the model just before they revised the PCB for the 3-pin modular connector.
After reviewing some of the past TRF posts about the beeper, and comparing both PCBs it appears possible. If I haven't missed anything, all that is needed is:
(1) A connection to R14 (the 3.3v logic),
(2) The addition of a 33 ohm resistor (R18) for the +V line, and
(3) A ground connection
Of course this assumes the revised CF PCB/circuitry didn't include something not visible that would be important for the beeper's operation.
Has anyone done this? If so, anything I missed or something else? Is your mod working OK?
After reviewing some of the past TRF posts about the beeper, and comparing both PCBs it appears possible. If I haven't missed anything, all that is needed is:
(1) A connection to R14 (the 3.3v logic),
(2) The addition of a 33 ohm resistor (R18) for the +V line, and
(3) A ground connection
Of course this assumes the revised CF PCB/circuitry didn't include something not visible that would be important for the beeper's operation.
Has anyone done this? If so, anything I missed or something else? Is your mod working OK?