I have a 220v buck regulator output 12v power supply, how to calculate its output power?
I measured with a digital multimeter output port voltage is 12v, and then transferred to the current block, directly to the meter measured power output port, did not show, is not the way to measure the current is not right? How to test specific
Or there is no way to calculate the power of the power, I now know the voltage is 12v, but the current does not come out ah? Put away
How do I know the power of my regulated power supply?
First, prepare a resistor (preferably the resistance wire, you can change the length of any), the resistance wire access circuit, measuring the no-load voltage and the ratio with the resistance wire voltage, constant adjustment of the length of the resistance wire, when the voltage is reduced by 10% , Measuring its current, this time is about the power of the full load power.
Details can refer to the Chinese electronic DIY home of the relevant information
First measure the current is required ammeter and load in series;
Second, the different digital table may be different, and some digital table current block exclusive of an output plug, please note whether the right!
Voltage is generally not measured, are almost the same as the nominal power = voltage in the X current, and the current and load, if it is no load when the current = 0, so to measure the current must be in the case of a load Measured out.
When measuring the current to the meter in series in the circuit, that is, first disconnect the circuit and then disconnect the meter at both ends.
