Hash board parts introduction

The article mainly introduces the various components needed by the hash board and their functions on the hash board.

1. Resistance

Code: R

Function: current limiting, partial pressure

Unit: Ohm (ohm or Ω)

Conversion: 1M=103K=106ohm

Law: The equivalent composite resistance value obtained after the resistors are connected in series is R=R1+R2;

The equivalent composite resistance value obtained after the resistors are connected in parallel is R=R1R2/(R1+R2);

Network resistor: Series network resistor RN, 8pinA type butt type;

Parallel network Resistor RP, 10pinB network type.

2. Capacity

Code: C

Function: filtering, coupling, blocking DC and passing AC

Unit: Farah F

Conversion: 1F=103mF=106uF=109nF=1012pF=1015fF

Law: The equivalent composite capacitance value obtained after the capacitors are connected in series is C=C1C2/(C1+C2);

The equivalent composite capacitance value obtained after the capacitors are connected in parallel is C=C1+C2;

Discharge capacity: CP

Polar capacitors: tantalum capacitors, aluminum capacitors.

3. Inductance

Code: L

Features: blocking AC, passing DC

Function: filtering, energy storage

Unit: Henry H

Conversion: 1H=103mH=106UH

Formula: Inductive reactance XL=2πf L

4. Diode

Code: D

Function: rectification, step-down, voltage stabilization, switching, detection, variable capacitance.

Features: unidirectional conductivity.

Type: The forward voltage of silicon diode is 0.6V～0.7V; 

The forward voltage of the germanium diode is 0.2V～0.3V.

Polarity: One end of the colored band (or color ring) is negative.

Zener tube: DZ stabilizes the voltage and works in the reverse breakdown zone.

Light-emitting diode: LED, which emits light when the forward conduction is conducted.

5. Triode

Code: Q

Function: switch, zoom.

Amplification conditions: Transmitting junction is forward-biased, a collector is reverse-biased.

Classified by structure: NPN and PNP.

6. Field-effect tube

Features: Use electric field effect to control current.

Function: Switch, amplify, variable resistance.

Type: Junction FET

Insulated gate field effect tube MOS:

N-channel (depletion type and enhanced type)

P-channel (depletion type and enhanced type)

Principle: Use a small gate-source voltage to control a large drain current.

7. Crystal

Code: Y

Unit: Hz

Conversion: 1Hz= 10-3KH = 10-6MH

8. Other

Integrated Circuit: U

 Connecter: CN