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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by dave g

  1. D

    BCD IC not working

    eric thanks, running the mux from 24v , the LEDs are 24v type, panel mount, I will try the extra caps. Vo from the mux datasheet, the switching output, = v supply ( i think )
  2. D

    BCD IC not working

    attached pdf of schematic
  3. D

    BCD IC not working

    hi am using a MC14520B BCD IC, which according to its waveform diagram, counts up to 0-15 decimal. I have built a test box, 555 timer generating 1hz clock , into BCD IC, then out to ADG406 multiplexer test box is used to check 14 way multicore cable, each output from mux is connected...
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