Hi Guys,
Probably going to be really silly question here.
I am trying to make a transistor switch with a voltage divider to get a output prportionally lower than the input when the base is pulsed.
I am using trying to get no more than 5V when using a 12V source (testing the voltage of a battery using an arduino).
I have chosen R1 as 1K, R2 as 2K and Rb as 4K. It seems to work when I turn the base on (I get around 5V output at 15V input). But when I turn the base off and measure the voltage across the capacitor I am still seeing the 15V input? Why could this be?
Thanks for any help in advance.
Mash
Edit: with a BC108 transistor.
Probably going to be really silly question here.
I am trying to make a transistor switch with a voltage divider to get a output prportionally lower than the input when the base is pulsed.
I am using trying to get no more than 5V when using a 12V source (testing the voltage of a battery using an arduino).
I have chosen R1 as 1K, R2 as 2K and Rb as 4K. It seems to work when I turn the base on (I get around 5V output at 15V input). But when I turn the base off and measure the voltage across the capacitor I am still seeing the 15V input? Why could this be?
Thanks for any help in advance.
Mash
Edit: with a BC108 transistor.