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  1. The symbols of Logic gates, OR, NOR, XOR, AND, NAND, Buffer, Inverter, Schmitt Trigger.

    logic1withName.png
  2. The symbols of L, C, R, Pot, Diode, Zener, Bjt, LED, Xtal, SCR, N, P MOSFET.

    AllParts-Basic01-n120190718withEurope_ScottWangAAC.png
  3. The symbols of N, P MOSFETs.

    10MosfetSymbols-n1-20180509PM1758.png
  4. Zener Values
    1W Standard VZ Tolerance is 5 %
    Code (Text):
    1.  
    2. 3 . 3 V   1 N 4 7 2 8 A
    3. 3 . 6 V   1 N 4 7 2 9 A
    4. 3 . 9 V   1 N 4 7 3 0 A
    5. 4 . 3 V   1 N 4 7 3 1 A
    6. 4 . 7 V   1 N 4 7 3 2 A
    7. 5 . 1 V   1 N 4 7 3 3 A
    8. 5 . 6 V   1 N 4 7 3 4 A
    9. 6 . 2 V   1 N 4 7 3 5 A
    10. 6 . 8 V   1 N 4 7 3 6 A
    11. 7 . 5 V   1 N 4 7 3 7 A
    12. 8 . 2 V   1 N 4 7 3 8 A
    13. 9 . 1 V   1 N 4 7 3 9 A
    14. 1 0 V     1 N 4 7 4 0 A
    15. 1 1 V     1 N 4 7 4 1 A
    16. 1 2 V     1 N 4 7 4 2 A
    17. 1 3 V     1 N 4 7 4 3 A
    18. 1 5 V     1 N 4 7 4 4 A
    19. 1 6 V     1 N 4 7 4 5 A
    20. 1 8 V     1 N 4 7 4 6 A
    21. 2 0 V     1 N 4 7 4 7 A
    22. 2 2 V     1 N 4 7 4 8 A
    23. 2 4 V     1 N 4 7 4 9 A
    24. 2 7 V     1 N 4 7 5 0 A
    25. 3 0 V     1 N 4 7 5 1 A
    26. 3 3 V     1 N 4 7 5 2 A
    27. 3 6 V     1 N 4 7 5 3 A
    28. 3 9 V     1 N 4 7 5 4 A
    29. 4 3 V     1 N 4 7 5 5 A
    30. 4 7 V     1 N 4 7 5 6 A
    31. 5 1 V     1 N 4 7 5 7 A
    32. 5 6 V     1 N 4 7 5 8 A
    33.  
  5. Code (Text):
    1.  
    2. The MOSFET Specification :
    3.  
    4. 2N5457-58D_Nch_Jfet.pdf
    5. 2N7000_7002_NDS7002A-Nch60V200mA_Vgs10V_5Ω_fc.pdf
    6. 2N7000_Nch60V200mA_Vgs10V_5Ω_th2.1V.pdf
    7. 2SK1294_Nch_60V40A_50mΩ_Vgs=4V.pdf
    8. 2SK2842_Nch_500V12A_0.4Ω_Dc2Dc_Motor_Toshiba.pdf
    9. 2SK2843_Nch_600V10A_540mΩ_Dc2Dc_Motor_Toshiba.pdf
    10. 2SK3564_Nch_900V3A40W3.7Ω.pdf
    11. 2SK3564_Nch_900V3A40W4.3Ω_Vgs10V.pdf
    12. 2SK790_Nch_500V15A_0.29Ω.pdf
    13. 2SK812_Nch_60V27A_85mΩ.pdf
    14.  
    15. AP9916H_Nch_18V35A_25mΩ.pdf
    16. BS170 application note.pdf
    17. BTS50080-1TMA_Nch_39V9.5A16mΩ.pdf
    18. BUK95_962R8_Nch_12V75A300W2.4mΩ.pdf
    19. BUZ11_Nch_50V30A_0.04mΩ.pdf
    20. BUZ71_Nch_50V14A_0.1Ω.pdf
    21. CEB6030L_Nch_30V52A-13.5mΩ.pdf
    22. CEFF630_Nch_200V10A_0.4Ω.pdf
    23. CEFF640-PF640(F)_Nch_200V18A-180mΩ.pdf
    24. CMT04N60_Nch_100V4A_2.2Ω_11Mhz.pdf
    25. DMN3150L_Nch_30v3.8A_72m?.pdf
    26. FDP5800_Nch_80V60A_4.6mΩ_Vgs10V.pdf
    27. FDP8440_Nch_40V80A_1.64mΩ_Vgs10V.pdf
    28. FDPF085N10A_Nch_100V40A_Vgs10V_8.5mΩ.pdf
    29. FDS6679_FDS6679AZ.gif (inside has two Direction Zener)
    30. FDV301N_Nch_22V220mA_Vgs2.7V5Ω_4.5V4Ω.pdf
    31.  
    32. FQA13N50CF_Nch_500V15A_Vgs10V_480mΩ.pdf
    33. FQP30N06L_Nch_60V32A_Vgs10V_35mΩ.pdf
    34. FQPF45N15V2_Nch_150V45A_40mΩ_Vgs10V.pdf.pdf
    35. FQU1306L-Nch-60V11A-0.115Ω.pdf
    36. FS10UM-5A_65W250V10A_0.52Ω.jpg
    37. FS10UM-5A_65W250V10A_0.52Ω.pdf
    38. FS5UM-10_Nch500V5A_1.8Ω_highspeed_mitsubishi.pdf
    39. FSCM0565R_FPS.pdf
    40. HCPL-3120_Mosfet_2A.gif
    41. IPD90P03P4L-04_Pch_30V90A4.1mΩ_logic.pdf
    42. IRF1010E_Nch_60V84A200W12mΩVgs10V.pdf
    43. IRF1010E_Nch_60V84A200W_12mΩ.pdf
    44. IRF150_Nch_100V40A55mΩ.pdf
    45. IRF2805_Nch_55V75A_4.7mΩ_Vgs10V.pdf
    46. IRF3205s_Nch_55V110A200W_8mΩ.pdf
    47. IRF3205_Nch_55V110A200W_8mΩ.pdf
    48. IRF3706_Nch_20V77A88W_Vgs4.5V_8.5mΩ.pdf
    49. IRF3710s_Nch_100V57A23mOhm.pdf
    50. IRF3710_Nch_100V57A-23mΩ.pdf
    51. IRF3710_Nch_100V57A200W_Vgs10V_23m?.pdf
    52. IRF510-513-Nch100V4A0.6Ω_SuperTex.pdf
    53. IRF520-Nch_100V9.2A_0.27Ω.pdf
    54. IRF530_Nch_100V14A_Vgs10V_160mΩ.pdf
    55. IRF540NS-NL_Nch_100V33A130W_Vgs10V_44mΩ.pdf
    56. IRF540N_Nch_100V33A120W_Vgs10V_40mΩ.pdf
    57. IRF540_Nch_100V22A85W_Vgs10V_55mΩ.pdf
    58. IRF630_Nch_200V9A_350mΩ.pdf
    59. IRF640A_Nch_200V18A_Vgs10V_180mΩ.pdf
    60. IRF640_Nch_200V16A_Vgs10V_180mΩ.pdf
    61.  
    62. IRF730_Nch_400V5.5A_Vgs10V_1Ω.pdf
    63. IRF740_Nch_400V10A125W_480mΩ_st.pdf
    64. IRF740_Nch_400V10A125W_550mΩ_IR.pdf
    65. IRF7606_Pch_30V3.6A-Vgs4.5V1.2A_Vgs10V2.4A_90mΩ.pdf
    66. IRF840_Nch_500V_450V_8A_1.1Ω.pdf
    67. IRFP150_Nch_100V40A55mΩ.pdf
    68. IRFP360_Nch_400V23A_0.2Ohm_ir.pdf
    69. IRFP4110PbF_Nch_100V120A_Vgs10V_4.5mΩ.pdf
    70. IRFP460_Nch_500V20A_0.27Ω.pdf
    71. IRFP460_Nch_500V20A_270mΩ.pdf
    72. IRFS3004-7PPBF_Nch_40V240A_Vgs-4-10V_1.25mΩ_D2PAK-7.pdf
    73. IRFS9N60A-Nch_600V9.2A_0.75Ω.pdf
    74. IRFU220N_Nch_200V5A_600mΩ.pdf
    75. IRFZ44N_Nch_55V49A_17.5mΩ_Vth(2~4V)_Vgs=10V.pdf
    76. IRFZ44N_Nch_55V49A_22mΩ_5.2Mhz_Vgs=10V_philips.pdf
    77. IRL3716_Nch_20V180A-210W~100W_Vgs10v_4.5V72A4mΩ.pdf
    78. IRL640A_Nch_200V18A_0.18Ω_Vgs=5V.pdf
    79. IRLB3034PbF_Nch_40V195A_Vgs4.5V_1.7mΩ.pdf
    80. IRLB3036GPbF_Nch_60V195A_2.4mΩ_Vgs4.5V.pdf
    81. IRLZ24-Nch_60V17A_0.1Ω.pdf
    82. IRLZ44N_Nch_55V47A_Vgs5V_ 22mΩ_1~Mhz.pdf
    83. IRLZ44_Nch_60V50A_28mΩ_5.2Mhz_Vgs=5V_vishy.pdf
    84. IXFHFT6N100F_Nch_1KV6A_Vgs±20V_1.9Ω.pdf
    85. IXTA3N110TRL_1100V3A150W_Vgs10V_Rds4Ω.pdf
    86. IXTL2N450_Nch_4500V2A_Vgs±20V_20Ω.pdf
    87. MCP1406-1407_6A High-Speed Power MOSFET Drivers.pdf
    88. MIC4416_17 IttyBitty_Low-Side MOSFET Driver.pdf
    89. MMFT3055EL_Nch_60V2A_Vgs5V_0.18Ω.pdf
    90. MOSFET-circuit-2005JUN02_POW_AN.pdf
    91. MOSFET-tech-01.pdf
    92.  
    93. NDP6030L_Nch_30V52A_20mΩ.pdf
    94. NTD4805N_Nch_30V88A_5mΩ.pdf
    95. NTE2382_Nch_100V9A_270mΩ_Vgs=4V.pdf
    96. NTE2987_Nch_100V20A_90Ω_Vgs5V_LogicLevel.pdf
    97. NXP-PSMN5R6-100BS_Nch_100V100A_Vgs-3-10V_4.72mΩ.pdf
    98. P2803NVG_Pch_Nch.pdf
    99. PHP_PHB_PHD45N03LTA_Nch_40V25A_Vgs15V_24mΩ.pdf
    100. PMH7902.pdf
    101. PSMN017-30PL_Nch30V32A_17mΩ_Logiclevel.pdf
    102. RSQ035N03_Nch_30V±3.5_Vgs10V-4V_62-94mΩ_.pdf
    103. RSR030n06_Nch_1W60V3A_Rds(on)4V_85mΩ.pdf
    104. RU3205_Nch_60V90A_7.5mΩ.pdf
    105. SI4410DY-02_Nch_30V10A_20mΩ.pdf
    106. SPP04N60C3_Nch_650V4.5A0.95Ω.pdf
    107. STB60NE03L-10 30V 60A 10mΩ I2PAK MOSFET.jpg
    108. STP16NF06_Nch_60V11A_0.08Ω_FP-16A.pdf
    109.  
    110. TC-2393_2SK1294_Nch_50V20A27mΩ.pdf
    111. TK12A50D_Nch_500V12A_Vgs10V_450mΩ.pdf
    112. TPC8801_Nch.pdf
    113. ucc37322_SINGLE 9A HIGH SPEED LOW- SIDE MOSFET DRIVER.pdf
    114. [code]
  6. The sound active control circuit -- Using the sound to active the relay to drive the load.

    Mic → Pre amp → CR Differential circuit → Schmitt circuit → Rectifier and filter → Toggle flip flop → bjt and relay

    R8 -- increasing the input resistance of Q2.
    C4,R6 -- Limited the frequency of sound.
    CR Differential circuit -- Narrow the width of wave.
    Schmitt inverter -- Converting the sound wave to square wave.
    Rectifier and filter -- Diode and capacitor used to converting a series of square wave to one pulse.
    Toggle flip flop -- Using CD4013 d flip flop as a toggle flip flop.
    C3,R3,D3 -- Interference filter to make sure the flip flop of Q clear to zero when the power up.
    The rest of schmitt inverters -- If the drawing current of relay is not that much as less 60mA, then it could be used the rest of inverters of 74HC14 to replace the bjt to drive the relay.
    R4 -- It can be using smaller to get more Ic current of Q1 to driver the relay.

    This circuit is very sensitive, because I didn't design the delay time during two sound, it is easy to active when the sound was detected.

    [​IMG]
  7. P type Mosfet Testing Circuit.

    PmosfetTestingCircuit-ScottWang-01.gif
    Willen likes this.
  8. N-ch type Mosfet Testing Circuit.

    NmosfetTestingCircuit-ScottWang-01.gif
  9. The below was what I designed for a detector of input port of 40 pins connector, it can be expands to more pins to detect that when you need more I/O ports.

    CD4051_74HC138_Vi_40P_eng_ScottWang.gif


    The below was what I designed for a detector of output port of 40 pins connector, it can be expend to more pins to detect that it just need more I/O port.

    [​IMG]
  10. Input Protection for Vdd and Adc of uC.

    If the Vdd of uC is 5V then the Zd1 and Zd2 are 5.1V, and R1 can be use as 0.22Ω/3W or 5W, if the Vdd of uC is 3.3V then the Zd1 and Zd2 are 3.6V, and R1 can be use as 0.1Ω/3W or 5W, the values of R1 will affecting the voltage of Vdd.

    SwitchModePowerInputProtection_ScottWang.gif
  11. Two Sets 10 channels O'scope and Multimeter Multi-Inputs Selector --

    Two rails of O'scope can be measure 20 points, or single rail can be measure 10 points and using another multimeter to measure 10 points.

    O'scope And Multimeter Multi-Inputs Selectors :

    This multi-inputs selectors was designed to measure many points of the circuit, the voltage level is 0 to 5V or logic pulse, I also drew a 40 channels monitoring points based on single-chip controller as 8748 long time ago, but I haven't complete it, actually is too lazy, and this two sets of pure logic circuit 10 inputs channels completed first, but this circuit was designed at about 21 years ago(1995), I were putted it in the box without completed until 8 years ago sorted out and found out the problems, complemented part of the circuit which wasn't completed, and finally the function was worked normal, the Vcc was provided by +5 V power supply, it can be change to add a 7805 with 9V battery, the total quiescent current consumption less than 20 mA, almost the power consumption focus on NE555 and LEDs. 

    All the details shown in the completed projects forums.
    Two Sets 10 channels O'scope and Multimeter Multi-Inputs Selector.

    [​IMG]

    [​IMG]

    [​IMG]
  12. 1. NE555 Pulse Generator and PWM adjustable circuit.
    D1, D2 : 1N4148.
    Clock, t = 0.69((R1+VR1)*C1)+0.69((VR1+R2)*C1)

    Pwm, Hi duty = 0.69((R1+VR1(①②))*C1)
    Pwm, Lo duty = 0.69((VR1(②③)+R2)*C1)

    The Circuit.
    NE555-PulseAndPwm-01_ScotTWang.gif

    2. NE555 Variable Frequency Square Wave Generator.
    If you only using square wave function without PWM control then you can shorted pin 1,3.
    NE555-PulseAndPwm-02_ScottWang.gif

    3. NE555 Square Wave With PWM Control.
    If you only using the PWM control then you can shorted pin 2,3.
    NE555-PulseAndPwm-03_ScottWang.gif

    4. The circuit of NE555 50% duty cycle.
    NE555_50%DutyCycleCircuit_ScottWang.gif

    5. NE555 Transistors Drivers for Relay And Motor.
    NE555-ClockAndPwm-Bjt-04_ScottWang.gif

    6. NE555 N ch Mosfet Drivers for Relay And Motor.
    NE555-ClockAndPwm-Mosfet-05_ScottWang.gif

    7. An small old antique NE555 oscillator without PCB built it about 30 years ago.

    [​IMG]
    [​IMG][​IMG]

    If you want to see all the details, please visit The Completed Projects forum.
  13. 2 sets and 4 kinds ±5~15V fixed dual power supplies.

    This is a two separated fixed positive and negative dual power supplies : this power has been used for over 18 years (before 1995)

    Regulator IC : 7815, 7915, 712, 7912, 7809, 7909, 7805,7905.

    Vout +15V, +12V, 10V, +9V, 0V, -9V, -10V, -12V, -15V, 870mA.

    Vout +5V, 0, -5V, 500mA.

    The values of voltage can be combined as 3,5,6,8,9,10,11,12,13,14,15,17,18,19,20,21,23,24,2 5,26,27,28, 29,30,31,32,34,35,37,40 volts.

    [​IMG]

    [​IMG]

    More details please go to The Completed Projects Collection.
    Two 4 kinds ±5~15V fixed power.
  14. The Transistor's Sink And Source.

    HighLowLogic_SourceandSink_ScottWang-02.gif

    If you want to know some more, google:
    The Transistor's Sink And Source.
    using transistor as switch.
    using npn transistor as switch.
    using pnp transistor as switch.
    operational amplifiers tutorials.