Re: Cheap Ebay Stuff: the Good, the Bad, and the Ugly – Post Your Reviews
You know, you could just get a <0.5$ PIC10/PIC12 micro with ADC and built in oscillator and use a current shunt to monitor the current consumption of the fan and output a tacho signal (something fixed at 1000-2000 rpm or something like that) as long as the current used by fan is within some limits.
Less than 1$ for everything but on the other hand if it saves a few dollars per fan...
You know, you could just get a <0.5$ PIC10/PIC12 micro with ADC and built in oscillator and use a current shunt to monitor the current consumption of the fan and output a tacho signal (something fixed at 1000-2000 rpm or something like that) as long as the current used by fan is within some limits.
Less than 1$ for everything but on the other hand if it saves a few dollars per fan...
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