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  1. cliffclavin

    Adding audio to cctv via the arial?

    Hello all! At work we have a closed circuit television system. It is a very cheap kit! The CCTV camera (composite video feed) is fed into a rf device, so the CCTV camera is viewed through a TV arial type connection (not rgb/composite) This is plugged into the arial circuit used to pick up...
  2. cliffclavin

    Led display Digital Voltmeter mod

    Hello! I would like to monitor the voltage from a sensor. The sensor produces 0 to 10 volts. I would like the display to show the voltage in relation to a scale of 1 to 2000. eg. 0v = 0 2.5v = 500 5v = 1000 7.5v = 1500 10v = 2000 The digital voltmeter project can be...
  3. cliffclavin

    CMOS power use?

    Hello. I am hoping one of you smart people could help answer a question for me. I am nearly finished building a three stage timer/ controller out of CMOS 4000 series IC's - I have built & checked each section of the circuit, and it works ok! A 4093 Schmitt Nand Gate provides clock pulses...
  4. cliffclavin

    3 stage timer design

    Hello I have some experience building electronic kits as a kid - radio's, transmitters, amp's etc. Later at University I was taught aspects of digital design using Electronics workbench - such as logic gates, flip flops, binary adders etc I have a basic working knowledge but with some gaps...
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