niconiconiSome electronics fun facts: Littelfuse started in 1927 and their first product was a milliamp fuse for protecting fragile milliamp meters. During World War 2, engineers from MIT Rad Lab and elsewhere found they could abuse them to make a popular type of RF/microwave power sensor - the forerunner of all later thermistor-based RF sensors that are still in use today. Modern sensors are fragile enough (no RF career is complete without a sensor burnout), but those are more so as they're literally fuses, and already DC-biased to the point of almost burning out. Someone should give this WW2 design a try again with modern SMD fuses. #electronics
poleguy looking for lost tools@niconiconi very cool. Some #ppprs racing engineers use the required power limiting fuse as a battery current sensor inside a control loop to allow maximal power to the motor during a race without blowing the fuse. They didn't bother with the Wheatstone bridge because the voltage drop at these high currents is quite significant. But the fuses are often still littlefuse brand in the 30-60 amp range.