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  1. C

    9V BATTERY CHARGER CIRCUIT

    Hi, found this circuit on the net. I have attached the schematic and a drawing of the pcb layout. Just need to know if it will correctly charge a 9v battery safely, and if the pcb I have drawn is correct. Thanks in advance for any help.
  2. C

    TESTING A 40673 DUAL GATE MOSFET

    Hi, please can any one tell me how to test if a 40673 mosfet is blown. Can I test this with a digital multimeter, if so how do I go about it ?. Pic attached. Thank you.
  3. C

    HELP NEEDED WITH FUSE RATINGS FOR ATX PSU MOD TO LAB PSU

    Hi, please could some kind soul help me with correct fuse ratings to protect the atx psu when connected to electical items. Picture is attached. I:E if any attached items, go bad , I need the fuse to blow instead of the atx psu continuing to give loads of current. Thank you.
  4. C

    Need to trigger A reed Relay with nearby RF

    Hi, can any one help , I want to build a pcb with a reed relay that will trigger on any transmitted RF signal  (front end protection in mind ). Hope this is possible, rather than using 12v tx on rear of radio to trigger the relay. This way it would be more portable to connect to any second...
  5. C

    SLIGHT HELP NEEDED WITH ACTIVE ANTENNA CIRCUIT

    Hi, please can some one answer wether I could use an axial inductor in this circuit instead of a wound coil for the required inductance of 20uH ?. Drawing attached. Thank you.
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