Measuring Triac circuit diagram with digital multimeter

Published:2011/9/7 21:38:00 Author:Lucas | Keyword: Measuring Triac , digital multimeter | From:SeekIC

The chart shows the digital multimeter measuring circuit. When it is appropriated to NPN file, then the G base of Triac VT is open and connected to C hole of hFE socket by a current limiting resistor R (330Ω or so), T1 is inserted into the E hole by wires. Resistor R here is used to prevent hFE circuit overload, and at this time, digital multimeter display is 000 , that is the off stste, then the G pole and T2 are in short connection by wires, then digital multimeter jumps immediately to 578 , which explains that it had turned. The right figure is the Triac double passing validation circuit.



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