npn to pnp conversion
npn to pnp conversion
(OP)
I'm trying to use a sensor that has sourcing output but needs to be sinking. I know that I can use a mechnical rely to solve this problem but I've been told that I can place a resistor on the load side and take care of this?????Hopefully I do not have to change the sensor.
Any solutions?
Any solutions?
RE: npn to pnp conversion
It would help with a schematic of your problem.
But from the information provided, I take it that your sensor has a high source output current and you need it to sink the current ?.
If you like (and not knowing anything about your sensor) why don't you use an extra transistor in the circuit.
Like I said not knowing anything about your sensor. When the output goes high it 'switches' on the transistor.
The O/P will sink to earth through the transistor.
How much it can depends on the type of transistor. How much you want it to, depends on any extra resistors you put between the collector of the transistor and your circuit.
The RP resistor is there to protect the base input (the value depends upon your sensor output)
Any help ?, yes no let me know.
Regards
RE: npn to pnp conversion
P.S. what kind of circuit is this sensor interfacing too (i.e. Analog / Digital, A/D, etc.)
RE: npn to pnp conversion
RE: npn to pnp conversion
Regards,
David.
RE: npn to pnp conversion
Regards,
David.
RE: npn to pnp conversion
RE: npn to pnp conversion
converter?
Thanks