dsk2858
Member level 2
- Joined
- Aug 17, 2011
- Messages
- 47
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,286
- Location
- Chennai,India
- Activity points
- 1,683
Hi,
I am planing to use BC109 as a switch to control supply voltage of a sensor through a MCU.
The sensor specifications 5VDC and <10mA.
The Base input voltage is 3.3VDC from the micro-controller.
My question are?
1.How to calculate the Base resistance voltage.
2.Whether only a resistance added in the base is sufficient to control the sensor or should i added any other resistance.
3.what about the leakage current although there is no Base voltage applied would it be there or not ,if suppose i observe leakage current how should i troubleshoot it.
I am planing to use BC109 as a switch to control supply voltage of a sensor through a MCU.
The sensor specifications 5VDC and <10mA.
The Base input voltage is 3.3VDC from the micro-controller.
My question are?
1.How to calculate the Base resistance voltage.
2.Whether only a resistance added in the base is sufficient to control the sensor or should i added any other resistance.
3.what about the leakage current although there is no Base voltage applied would it be there or not ,if suppose i observe leakage current how should i troubleshoot it.