Need help with a transistor
Need help with a transistor
(OP)
I want to switch a transistor (as below) that will supply current via the 100R resistor when power is applied. However, I would like to be able to turn the transistor OFF and ON using a micro. Any ideas?
_______________ +5V
| |
| |
_|_ |
| | |
| | |/
| | /¯
¯|¯ |/
|________|
| |\
_|_ \
| | \
| | |
| | _|_
¯|¯ | |
| | | 100R
| | |
| ¯|¯
| |____________ rest of cct
|
_|___________________ GND
_______________ +5V
| |
| |
_|_ |
| | |
| | |/
| | /¯
¯|¯ |/
|________|
| |\
_|_ \
| | \
| | |
| | _|_
¯|¯ | |
| | | 100R
| | |
| ¯|¯
| |____________ rest of cct
|
_|___________________ GND





RE: Need help with a transistor
RE: Need help with a transistor
_______________ +5V
| |
| |
_|_ |
| | |
| | |/
| | /¯
¯|¯ |/
|________|
| |\
_|_ \
| | \
| | |
| | _|_
¯|¯ | |
| | | 100R
| | |
| ¯|¯
\ |
\ | |
\|_______/\______ micro
/| |
|/ | |
/ ¯ |_______ rest of cct
|
|
|_________________ gnd
I think this is what you mean.
The problem with this is that the micro will ultimately control the 100R load. What I need is when power is applied, the PNP transistor is on, regardless of the micro. Then I need to turn the PNP transistor OFF with a micro.
RE: Need help with a transistor