Power supply / converter with display (voltmeter/ammeter) (Review)
Summary
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Claimed
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From my tests
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Measurement accuracy:
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0.1%
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the measure value is totally wrong (see below)
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Refresh rate:
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"about 200ms"
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500ms
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Measured voltage
Test with no load:
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According to display
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Measured with multimeter
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1st time
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2nd time
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1.0
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1.25
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1.25
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2.0
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2.39
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2.24
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5.0
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5.30
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10.0
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10.65
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10.43
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15.0
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15.63
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18.0
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18.71
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Test with about 10ohm load:
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According to display
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My measurement
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1.3V/0.10A
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3.30V/0.315A
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After being connected for several minutes the displayed value slowly goes upwards:
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Elapsed time
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According to display
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10 s
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1.3V/0.10A
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30 s
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1.7V/0.13A
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1 minute
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2.0V/0.17A
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2 minutes
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2.5V/0.21A
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3 minutes
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2.8V/0.25A
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4 minutes
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3.0V/0.27A
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5 minutes
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3.1V/0.27A
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Increasing output to 10.04V/0.901A (my measurement), the display shows 9.7V/0.89A
After turning the device off, and leaving it off a few minutes, then turning it on again (my measurement are 10.06V/0.904A during the whole period):
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Elapsed time
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According to display
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10 s
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5.0V/0.44A
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30 s
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6.5V/0.58A
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1 minute
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7.5V/0.68A
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2 minutes
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8.6V/0.79A
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3 minutes
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9.3V/0.85A
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4 minutes
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9.6V/0.88A
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5 minutes
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9.7V/0.89A
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