School Educational Student  experiment ammeter voltmeter DIY MF47A  Analog multimeter

Product Description

 

MF-47A material list

A. Components
1. resistance (Ohm)

R1 2.3Ω	R2 0.59Ω	R3 12Ω	R4 125Ω	R5 22k
R6 75k	R7 400k	R8 2M	R9 7.5M	R10 3.38M
R11 1.12M	R12 220k	R13 41k	R14 14k	R15 2.22k
R16 202Ω	R17 19Ω	R18 56Ω	R19 4.8k	R20 13k
R21 750Ω	R22 9.6Ω

 

2. Adjustable resistor ( Ohm)           WH1 10k (Resistor zero adjustment potentiometer vertical)             

 WH2 500(or 1k)
3. Diode           D1/D2/D3/D4/D5/D6 4007(×6)      

4. Fuse clip  2pcs  
5. Capacitance     C1 10μf/16V   C2 0.01μf         

6. Fuse 1pcs  (0.5 - 1A, internal resistance less than 0.5 Ohm)
7. Connecting line  4pcs  (1.5V battery positive and negative < long line >\9V+< short line >\1.5V+ and 9V- connected to battery clip by short line)
8. One short line (circuit board J1 short).

9. PCB 1pcs

 

B,Plastic parts

1. Panel + meter  (I=46.2 uA) 

 2. switch knob    

 3. Brush knob      

 4. Battery cover plate
5. carrying handle     

  6. Lifting rivet (x 2)  

  7. Potentiometer knob     

8. Transistor socket 

9. Back

C,Standard parts 

1. Screw M3 x 6 (x 2) (for stationary rear cover)

 2. spring (x 1)

3. steel ball(φ4×1)   
4. rubber washer (for lifting damping)

 

D.

1. Battery clip (x 4) (small clip 1.5V +) 2. nameplate 3. mark 4. V-shaped brush 

5. transistor insert (x 6)

 

6. input cannula (x 4)

E,Instruction manual,meter pen