TREE

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  

This is the RF Probe for Multimeter Circuit Diagram. To measure the RF voltage in a circuit to convert the signal unless they RF voltmeter. This conversion may be done with a very simple circuit, called a point or RF probe. A tip for RF Multimeter has to be made in a metal box with two connectors, one that receives the RF signal and another that goes to the multimeter.  In the case of this circuit the signal passes through two connectors between them and the RF signal is picked up.This signal passes through a 18 pF capacitor, a diode germanium, a resistor of 47 kOhm, and a bypass capacitor 33 nF. The anode of the diode is connected to the positive lead of the voltmeter and the other to ground. RF Probe for Multimeter Circuit Diagram