Version 3
    Making Logic Gates From Discrete Components

    The Learning Circuit | element14 presents |  Project Videos | VCP Biography: Karen



    In the previous lesson, Karen explained the logic behind AND, NAND, OR, NOR, NOT, XOR, and XNOR logic gates. In that episode, we also learned that logic gates are typically contained in IC chips, with multiple gates within each chip. For this episode’s project, Karen has decided to throw out the ICs, and instead, use transistors to create each logic gate, further demonstrating how the logic of each gate type works. Follow along to continue the journey of understanding logic gates through the use of transistors. Solder along and you’ll end up with a tidy little project contained within a couple of Altoid tins! In the end, Karen dares you to try your hand at creating the more complicated XOR and XNOR gates out of transistors. Are you up to the challenge?         




    AND Gate















    Bill of Materials


    Product NameManufacturerQuantityBuy KitBuy Kit
    Prototype Board, 25 x 15 grid, 1.6 mm, 72 mm, 47 mmMulticomp1Buy NowBuy Now
    Prototype Board, Phenolic, 30 x 25 grid, 1.6 mm, 94 mm, 71 mmMulticomp1Buy NowBuy Now
    Transistor, BC547, NPNMulticomp9Buy NowBuy Now
    Hook Up Wire, Blue, 22 AWG, 25 ft, solidNTE ELECTRONICS1Buy NowBuy Now
    Resistor Set, 480pcs, 16 x E3 Series Values, 1/4W Through Hole (1kohm, (2) 10kohm)Velleman1Buy NowBuy Now
    Tactile Switch, 10mm, Blue, 24 VDC, 50mA, 2.54mmNKK SWITCHES2Buy NowBuy Now
    Slide Switch, SPDT, 2.5mm, Through Hole, 6 pinE-SWITCH1Buy NowBuy Now
    LED, Red, Through Hole, T-3 (10mm), 20 mA, 1.8 V, 640 nmClear Lens1Buy NowBuy Now
    Board-To-Board Connector, 2.54 mm, 4 Contacts, Female-Receptacle, 1 RowsMulticomp10Buy NowBuy Now
    Board-To-Board Connector, 2.54 mm, 4 Contacts, Male-Header, 1 RowsMulticomp2Buy NowBuy Now
    9V battery snap, flexibleMulticomp1Buy NowBuy Now
    Battery, 9 V, PP3, AlkalinePro Elec1Buy NowBuy Now


    Additional Parts:


    Product Name
    Altoid Tins