L
likearock111
Guest
Now you have me thinking... I have this extra case and some extra parts. Is it possible to make a small circuit that would have two switches. One for the blinkers and one for the tail light. That would have two adjustments one for the blinkers and one for the blink rate of the tail light (if I had the switch in the position for the tail light to blink).
Sure is! Basically, you'd need to build a parallel circuit that is very similar to the one you already built (but not quite!), and then run both circuits off the same battery and put them in the same enclosure. I have attached a diagram of the circuit you'd need to use for your tail light. The turn signal circuit stays exactly the same.
I based this tail light circuit on the same parts that you already used in the previous circuit, so you won't have to buy any new parts. A few things to note:
Switch Position 1: Flashing. In this state, the CD4047BE is powered up and in astable mode, just as before.
Switch Position 2: Solid on. In this state, the LED is directly connected to +12V and ground, so it will stay on solid, which is what we want. If you look at the diagram carefully, though, you'll see that the CD4047BE (the IC that creates the UP-DOWN-UP-DOWN voltage signal used in making the lights flash) is still powered up in this position. This is unnecessary, and will waste a little bit of electrical power (much smaller than what the LED uses, though), but it is an unavoidable consequence of trying to use the same parts that you used before. On the whole, you shouldn't be able to notice if the CD4047BE were on or off, based on battery life.
Switch Position 3: Off. In this state, neither the CD4047BE nor the LED itself is receiving power. In essence, we're just disconnecting the whole circuit from the battery.
And don't forget that, in this circuit, the second pole of the DP3T switch is connected to ground, not to +12V! This means that you'll have ground connected to one pin of the switch, and +12V connected to another, which, unless you're really careful with your soldering and stray wire strands, is a recipe for a short!! Do I remember correctly that your other enclosure is plastic? If so, that will make your life a lot easier in terms of preventing unintended case shorts.
If you have any questions, just let me know!