i need a circuit with 2 switches, so when you press switch A, LED A comes on and LED B goes off, then when you press switch B, LED B comes on and LED A goes off. whats the easiest way to make this?
i need a circuit with 2 switches, so when you press switch A, LED A comes on and LED B goes off, then when you press switch B, LED B comes on and LED A goes off. whats the easiest way to make this?
That's what bistables do, the one with the chip is actually identical to my suggestion using two transistors - both will light only one LED, when you press the other button it's LED will come on and the other LED will go off.
Yes, general purpose NPN transistors - nothing special at all, I'd normally use BC107's - but I use them for everything 8)
You could even use germanium transistors if you wanted!.
It's a very simple circuit to understand - all you need to know is that if you take the base of a transistor high, it's collector will be low. And if you take the base low, the collector will be high. Work from that, and follow the operation of the circuit!.
i cant get it to work. when i press button A, LED A comes on, press button B, LED B comes on, press both, both LED's come on. av tried it connected all different ways. what am i doing wrong?
i cant get it to work. when i press button A, LED A comes on, press button B, LED B comes on, press both, both LED's come on. av tried it connected all different ways. what am i doing wrong?
i have re-designed my circuit, so rather than have 2 buttons, i now have 1 which switches between mode A and B by pressing the same button... made this by usin an alternating on/off switch and making use of the extra gate to light the second LED. note that this is the unedited circuit.. if anyone wants an edited version post here and i will make it **broken link removed**