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2019-06-23 3:35 pm
I'm trying to design a circuit to shut off the batteries to my robot in the event of a short circuit.
The obvious answer would be to use a fuse but fuses are slow and I'm going to need a big bag of fuses. Another option would be a thermal fuse but I'd need a better understanding of the power consumption, not something I have at this stage of the design.
I have a Nano monitoring the batteries and it has no problem disconnecting the batteries to the motors and servos just using a mosfet.
My problem is controlling the battery powering the electronics as disconnecting the battery will power down the Nano causing it to restart and reconnecting the battery. So I need a normally closed switch that can be opened with a pulse from the Nano and it will stay latched open until the battery is physically removed from the circuit.
I can see how to do this with a relay but a low battery mess up that circuit.
Someone must have made a solid state version of this.
All the battery monitoring circuitry I have found requires power to operate and is geared towards charging or will work well on 440V so the internet has been no use so far but then I may not know what I'm looking for.
The 600 series had rubber skin. We spotted them easy, but these are new. They look human... sweat, bad breath, everything. Very hard to spot.