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  1. M

    Wireless doorbell to latching ON/OFF Switch

    I would like to use a wireless doorbell I have to control a latching ON/OFF Switch, I found this great video My receiver circuit is slightly different as it has a CD4069 but I believe it won't matter as the wires going to speaker are used. The schematic is not clear on the part where the 2...
  2. Y

    PNP Transistor - base voltage higher than collector

    Hi guys, Is it ok for the base voltage driving a PNP transistor to be higher than the collector voltage? I'm trying to throw the input to a HS088 doorbell board (see attached) high from a microcontroller in place of the button shown on the schematic - have been testing with Arduino UNO in this...

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