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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.

tach

  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...

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