hi everybody,
i am new to this forum,
a mechanical engineer who works as a tour guide but in my free time trying to develop some stuff.
i am looking for a circuit scheme but do not know how it should be called.
(my mother's language is not english)
the circuit should act like this :
1. there is a DC source that varies between 9V to 12V (3v dynamo + 9v dc battery)
2. there are 4 bulbs.
3. i wish to light 1 bulb if the voltage is 9V.......
light 2 bulbs @ v=10V, light 3 bulbs @ v=11V, light 4 bulbs @ v=12V.
4. it should probably consist of diods and/or transistors.
thanks ahead for the help.
doronb
i am new to this forum,
a mechanical engineer who works as a tour guide but in my free time trying to develop some stuff.
i am looking for a circuit scheme but do not know how it should be called.
(my mother's language is not english)
the circuit should act like this :
1. there is a DC source that varies between 9V to 12V (3v dynamo + 9v dc battery)
2. there are 4 bulbs.
3. i wish to light 1 bulb if the voltage is 9V.......
light 2 bulbs @ v=10V, light 3 bulbs @ v=11V, light 4 bulbs @ v=12V.
4. it should probably consist of diods and/or transistors.
thanks ahead for the help.
doronb