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Hall-Sensor Current Monitor

2015-01-23 10:19  
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The circuit uses a Hall-effect sensor, which consists of an IC that resides in a small gap in a flux-collector
Hall-Sensor Current Monitor

toroid, to measure dc current from 1 to 40 A. Wrap the current-carrying wire through the toroid; the Hall voltage Vh is then linearly proportional to the current (/). The current drain from Vb is less than 30 mA. To monitor an automobile alternator`s output current, for example, connect the car`s battery between the circuit`s VB terminal and ground, and wrap one turn of wire through the toroid (or, you could wrap 10 turnsa€”if they`d fita€”to measure 1 A full-scale). When 7=0 V, the current sensor`s (CSl`s) VH output equals one-half of its 10-V bias voltage, VH and Vout arc zero when I is zero; you can then adjust the output gain and offset to scale Vout at 1 V per 10 A. 1. C1 and C2 ARE 199D TANTALEX CAPACITORS FROM SPRAGUE. 2. L1 IS A 6860-23 INDUCTOR FROM CADDELL-BURNS. 3. R1A, R1B AND R1C ARE PART OF A THIN-FILM RESISTOR NETWORK SUCH AS THE CADDOCK T914-10K 4. CS1 IS A HALL-EFFECT CURRENT SENSOR (CSLA1CD) FROM MICROSWITCH.

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