Electronics > Beginners

Low Voltage Relay

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Kaluriel:
I need to power an OLED display with 14V, however it must be powered up after some commands have been sent. However my logic is running on 2.5V which isn't enough to power any coil relays I can find.
The maximum voltage on the open-drain pins of the PIC i'm using only allows a maximum of 5V, so I was wondering if there is any other way to switch on another circuit at low voltages, else I'll just replace the PIC I'm using.

bilko:
Try googling 'logic level mosfet'

johnmx:
Use a small N-mosfet, preferably with low rds(on) and low gate-threshold voltage (e.g. Si2312BDS). Connect the gate to the pin of the PIC with a small resistor, 100Ohm will do. For power MOSFETs you should use a mosfet driver instead of a resistor.

Tony R:
maybe you shouldn't use a coil. they make solid state relays. I'm sure you can find one that will work for what you need.

Kaluriel:
thanks, I'll look into all of these :)

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