How do you know the voltage regulator diode voltage regulator
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1, a resistance (to be determined) and the regulator tube in series, received a DC power supply (voltage to be determined), with a voltage meter to measure the voltage across the regulator, the measured value is the voltage regulator. (The Zener of the Zener tube terminates at the positive terminal of the power supply)
2, speculate that the regulator's approximate regulator value (from the device's disassembly source can be inferred), if the regulator value is below 10V, you need DC power supply greater than 10V, you can take 15V, the resistance of the series size R = (15V - Estimated voltage regulator) / (regulator power (usually 0.5W) / estimated voltage regulator value), the circuit is installed, the measured voltage across the regulator tube is the actual voltage regulator.
3, Regulators larger than 10V, measuring methods are similar, there is a point, the power supply is always greater than the regulator's power supply.
4, the characteristics of the regulator tube determines the voltage regulator has a current range requirements, that is, only in a certain range of current regulator. Such as 5mA < I < 100mA.
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