fouadalnoor
Member
Hello guys,
I am trying to run a motor when an output from my chip (PICAXE-08M) is high.
I am using a BC547B with a 1.8K resistor in series with the base. I connected the emmiter to ground and the motor is connected (in parallel with a diode) to the collecter and up to 9v VCC.
For some reason when I connect my 5v output from the chip, the motor starts, runs very shortly and then stops. After a few seconds it repeats.
Now when I tried to simply replace the 5v on the base with 9v (from my VCC) it started working... But I want to run the motor off my chip...
Any idea's as to why it's not working properly? (I am thinking the tranistor is simply not producing enough collector current with only 5v?).
Hope you can help!
Fouad.
PS: From the diagram I have:
LOAD = Diode with Motor
Rb = 1.8k
Voltage on base Vb = 5v
I am trying to run a motor when an output from my chip (PICAXE-08M) is high.
I am using a BC547B with a 1.8K resistor in series with the base. I connected the emmiter to ground and the motor is connected (in parallel with a diode) to the collecter and up to 9v VCC.
For some reason when I connect my 5v output from the chip, the motor starts, runs very shortly and then stops. After a few seconds it repeats.
Now when I tried to simply replace the 5v on the base with 9v (from my VCC) it started working... But I want to run the motor off my chip...
Any idea's as to why it's not working properly? (I am thinking the tranistor is simply not producing enough collector current with only 5v?).
Hope you can help!
Fouad.
PS: From the diagram I have:
LOAD = Diode with Motor
Rb = 1.8k
Voltage on base Vb = 5v
Attachments
Last edited: