Who never used a multimeter Chinese yellowing that shoot the first resistor! Despite being heavily criticized, this multimeter is identical to any other, is a lightweight tool, compact, inexpensive and reliable. It has as main component IC 7106, which is an analog to digital converter, with output to liquid crystal display (LCD) 3 and 1/2 Digits.
The Marcelino (which may have other colors), has several brands and models, but his real name is 830, there are versions without the test transistors, there are also variants with signal generator 50Hz, thermometer, continuity test with back-light, etc.
This multimeter can measure DC Volts 0.1 mV to 1000V, AC Volts 0.1V to 750V, Ampere DC 0.1 mA to 10A, Ohm 0.1 Ω to 2MΩ, diode and hFE for bipolar PNP transistors and NPN.
Basic scheme of Digital Multimeter circuit diagram
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