Noob here.
I want to design a control circuit that will turn on four 12 volt bulbs lets say. The circuit is controlled by a single momentary switch (On-OFF-ON). One press of the switch up, turns on bulb 1. Press it up again, now bulbs 1 and 2 are on. Press up again, bulbs 1,2 & 3 are on. You get the idea. Once all 4 are on, pressing up does nothing.
Pressing down on the switch will turn off bulbs one at a time. Once all are off, pressing down does nothing.
Can this be done with 12 volt automotive style relays, or latching relays, diodes, etc ? What would the schematic look like? Is this even possible?
I know this would be easy for an arduino or such design but I would like to keep it old school if possible.
Replies: 696
Yes this can be done without microcontroller.
You need logic gate ICs and probably flip-flops too.
Serch for logic gates and build the logic using gates. Its just like a brain game. Its interesting.
After getting the logic, convert those using respective gate ics.
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