Hi,
I'm struggling with a dilemma of how to switch a 12 VDC single coil latching relay from a very low power RF MCU (TI CC26xx family) which operates on 3VDC.
The relay coil only requires 5 milliseconds at 16 milliamperes to latch/switch, and it's critical to minimize current drain as this is all powered from RF power harvesting with no batteries (capacitors only). I have already proven the 470 uF cap can switch the relay 4 to 5 times on a single charge, so that's no issue.
The...
Low-power MCU to 12 VDC Latching Relay Switch
I'm struggling with a dilemma of how to switch a 12 VDC single coil latching relay from a very low power RF MCU (TI CC26xx family) which operates on 3VDC.
The relay coil only requires 5 milliseconds at 16 milliamperes to latch/switch, and it's critical to minimize current drain as this is all powered from RF power harvesting with no batteries (capacitors only). I have already proven the 470 uF cap can switch the relay 4 to 5 times on a single charge, so that's no issue.
The...
Low-power MCU to 12 VDC Latching Relay Switch