Because that is the way the chip was designed. No special reason.
A 7806 would be a +6VDC 3 pin linear voltage regulator. Its partner the 7906 is -6VDC but has a totally different pinout.
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Pin 1 of the IC7402 is an output pin because it is part of a quad 2-input NOR gate configuration. Each NOR gate within the IC has specific input and output pins, and pin 1 corresponds to the output of the first NOR gate. The output pin provides the logical result of the NOR operation performed on the two input signals connected to the associated input pins.
IC 7806 have 3 pins. pin1 - in, pin2 - GND, pin3 - out... It provides regulated 6V DC supply...
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IC 7402 is different from the other type of IC like 7404,7408,7432 and 7400 when it is connected to have an output desired... if you noticed all i mentioned ic is connected from left to the right. input pin 1 and 2, output pin 3 input pin 4 and 5, output pin 6 input pin 13 and 12, output pin 11 input pin 10 and 9, output pin 8 while in nor gate, to have the desired output it must be connected from right to left... input pin 2 and 3, output pin 1 input pin 5 and 6, output pin 4 input pin 8 and 9, output pin 10 input pin 11 and 12, output pin 13
The PIN (Pin Identification Number) of a 3-input OR gate typically refers to the specific pin configuration for that gate in a circuit or on an integrated circuit (IC) package. For a standard 3-input OR gate, it usually has three input pins and one output pin. The exact pin configuration can vary depending on the manufacturer and the specific IC, so it's important to refer to the datasheet for that component for accurate pin assignments. In general, the output pin will be labeled as 'Y' or similar, while the input pins are labeled as 'A', 'B', and 'C'.
I should expect a real-world op-amp to have 5connections:-- the inverting signal input-- the non-inverting signal input-- the signal output-- the power supply input-- the ground connection.
There is no formal adc input on the 8051. However, the CMOS version of the chip can use a technique involving a resistor, diode, and capacitor, along with a bidirectional pin (or one output pin and one input pin) to implement a "quick and dirty" adc function. You discharge the capacitor and then let it charge to the voltage of the input. You measure the time it takes to see the input pin change, and you calculate the input voltage.
Yes you need an adaptor to change from a 2 pin input to a 3 pin input and transform from the standard 110v used in America to the 220v used in Ireland. These arent too expensive and can be bought in many airports and supermarkets.
The 7812 is not a logic gate. It is a three terminal voltage regulator with an output of +12V.Looking at the pins of the TO-220 device, with the flat side down, the left pin and the case is common, the center pin is input,and the right pin is output. For the smaller TO-92 78L12 device, the left pin is output, the center pin is common, and the right pin is input
L293D is having 20 pin IC and also 16 pin IC. description of 20 pin is: 1-enable 1 2- input 1 3- output 1 4,5,6,7,14,15,16,17- ground 8- output 2 9- input 2 10,20-vs 11-enable 2 12- input 3 13-output 3 18-output 4 19-input 4 description for 18 pin: 1-enable 1 2- input 1 3- output 1 4,5,12,13- ground 6-output 2 7- input 2 8,18-vs 9-enable 2 10-input 3 11-output 3 14-output 4 15-input 4