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  1. mojozoom

    Comparator help please -tach/shift light project

    My old car uses a 1mA current driven tach movement and the stock circuit isn't compatible with the MSD ignition box I use, and the adapter they sell to make the tach work buzzes like the dickens. So I worked up a tach circuit based on the current tach diagrams in the LM2907 datasheet that'll...
  2. Mike0rr

    Need help with storing some data onto Register.

    Once again, I'm stuck on a (likely) not so complex issue but I lack the proper vocabulary to find the answer quickly on Google. Long story short, I've made a calculator using two, 4-Bit BCD Full adders. The part that this post concerns is in between the Input (0-9 Keypad and Decoder) and the BCD...

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