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.
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.
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...
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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