I'm currently considering my options for driving a bunch of single-coil bistable (latching) 5V/250Ω relays which set and reset at 3.75V.
The solution I'm leaning on atm is one 74HC541 octal buffer/driver per four relays. The 74HC541 is rated at ±25mA per output, and if each output pair (four total) is grounded between pulses, I'm thinking there would be no need for any kickback protection either as the inductor would be shorted out at the end of the pulse.
Timing/speed is not really a factor—I'm just switching in/out some low-level stuff once in a while. I know H-bridges is normally the right tool for the job, but the lack of google hits for this particular solution made me wonder if I've missed something obvious here? Thanks.
The solution I'm leaning on atm is one 74HC541 octal buffer/driver per four relays. The 74HC541 is rated at ±25mA per output, and if each output pair (four total) is grounded between pulses, I'm thinking there would be no need for any kickback protection either as the inductor would be shorted out at the end of the pulse.
Timing/speed is not really a factor—I'm just switching in/out some low-level stuff once in a while. I know H-bridges is normally the right tool for the job, but the lack of google hits for this particular solution made me wonder if I've missed something obvious here? Thanks.
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