4-bit D-type Registers with 3-State Output IC - 74HC173 The 74HC Series 74HC173 is a 4-bit register that includes D-type flip-flops featuring totem-pole 3-state outputs capable of driving highly capacitive or relatively low-impedance loads. The high-impedance third state and increased high-logic-level drive provide these flip-flops with the capability of being connected directly to and driving the bus lines in a bus-organized system without the need for interface or pull-up components. Up to 128 of the 74LS173 outputs can be connected to a common bus and still drive two Series 74LS TTL normalized loads, respectively. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output control circuitry is designed so that the average output disable times are shorter than the average output enable times. Gated enable inputs are provided on these devices for controlling the entry of data into the flip-flops. When both data-enable (G1, G2) inputs are low, data at the D inputs are loaded into their respective flip-flops on the next positive transition of the buffered clock input. Gate output-control (M, N) inputs also are provided. When both are low, the normal logic states (high or low levels) of the four outputs are available for driving the loads or bus lines. The outputs are disabled independently from the level of the clock by a high logic level at either output-control input. The outputs then present a high impedance and neither load nor drive the bus line. Detailed operation is given in the function table. The 74LS173 is characterized for operation from 0°C to 70°C. Pinout: Pinout of 74HC173 IC

4-bit Magnitude Comparator IC - 74HC85 The 74HC Series 74HC85 are high-speed Si-gate CMOS devices and are pin-compatible with low-power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC85 IC are 4-bit magnitude comparators that can be expanded to almost any length. They perform the comparison of two 4-bit binary, BCD, or other monotonic codes and present the three possible magnitude results at the outputs (QA>B, QA=B and QAB, IA=B and IAB = = LOW and IA=B = HIGH. For words greater than 4-bits, units can be cascaded by connecting outputs QA? and QA=B to the corresponding inputs of the significant comparator. Pinout: Pinout of 74HC85 IC

4-bit Parallel-Access Shift Register IC - 74HC95 The 74HC Series 74HC95 is a 4-Bit Shift Register with serial and parallel synchronous operating modes. The serial shift right and parallel load are activated by separate clock inputs which are selected by a mode control input. The data is transferred from the serial or parallel D inputs to the Q outputs synchronous with the HIGH to LOW transition of the appropriate clock input. The HC95 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families. Pinout: Pinout Of 74HC95 IC

4-CH IR Line Sensor Module A 4-channel IR line sensor module is a type of sensor that uses infrared (IR) technology to detect the presence or absence of a line or object. It typically consists of four individual IR sensors , each with its own phototransistor, that are arranged in a row. The module can be used to detect the position of a line, the edge of an object, or the presence of an obstacle in a robotic or automation application. It is often used in line-following robots, edge detection, and other similar applications. Applications: Smart car Line and edge following Omnidirectional detecting On-board indicator Package Contains 1 x Tracking Module (Hollow Board + Small Plate Forward) 1 x Female to Female Dupont Line

4-Line to 16-Line Decoder/Demultiplexer IC - 74HC154 This is the 74HC Series 74HC154 IC, Each of these 4-line-to-16-line decoders IC utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs, G1 and G2, are LOW. The demultiplexing function is performed by using the 4 input lines to address the output line, passing data from one of the strobe inputs with the other strobe input LOW. When either strobe input is HIGH, all outputs are HIGH. These demultiplexers are ideally suited for implementing high-performance memory decoders. All inputs are buffered and input clamping diodes are provided to minimize transmission-line effects and thereby simplify system design. check out : 74238 IC Pinout: Pinout Of 74HC154 IC

.

4-Pins DIP Momentary Square Tactile Push Button Switch 10 Pieces - 6x6x5mm 6x6x5mm Tactile 4 Pin Push Button Switch is widely used as a standard input buttons on electronic projects. These work best when you mount it on PCB but can also be used on a solderless breadboard for temporary connections in prototypes. The pins are normally open (disconnected) and when the button is pressed they are momentarily closed and complete the circuit. This tact switch also offers reliable dome contact technology and strong tactile feedback, with multiple operating forces to choose from. Applications include telecommunications, consumer electronics, audio/visual, medical devices, testing/instrumentation, and computer/peripherals.

4-Pins DIP Momentary Square Tactile Push Button Switch 10 Pieces - 6x6x8mm 6x6x8mm Tactile 4 Pin Push Button Switch is widely used as a standard input buttons on electronic projects. These work best when you mount it on PCB but can also be used on a solderless breadboard for temporary connections in prototypes. The pins are normally open (disconnected) and when the button is pressed they are momentarily closed and complete the circuit. This tact switch also offers reliable dome contact technology and strong tactile feedback, with multiple operating forces to choose from. Applications include telecommunications, consumer electronics, audio/visual, medical devices, testing/instrumentation, and computer/peripherals.

4-Pins DIP Momentary Square Tactile Push Button Switch 5 Pieces - 12x12x12mm 12x12x12mm Tactile 4 Pin Push Button Switch is widely used as a standard input buttons on electronic projects. These work best when you mount it on PCB but can also be used on a solderless breadboard for temporary connections in prototypes. The pins are normally open (disconnected) and when the button is pressed they are momentarily closed and complete the circuit. This tact switch also offers reliable dome contact technology and strong tactile feedback, with multiple operating forces to choose from. Applications include telecommunications, consumer electronics, audio/visual, medical devices, testing/instrumentation, and computer/peripherals.

4-Soldering Zoo Animal Kit 4-Soldering Zoo Animal Kit is the perfect introduction to soldering and basic electronics for kids aged 6 and up. This DIY kit includes everything needed to create circuits, play with LEDs, and bring adorable animal characters to life. The kit features six pre-cut animal PCBs, LEDs, battery holders, and more, allowing kids to explore the world of STEM education in a fun and interactive way. The customizable animal characters and scenes, coupled with soft light RGB LEDs and a 48-hour battery life, make this kit ideal for creating unique animal displays at home, in the classroom, or during after-school events. The RoHs-free, soft-edge PCBs with immersion-gold edges ensure safety and environmental friendliness. Assembling the kit takes approximately 2 hours, providing an engaging and educational activity. The 4-Soldering Zoo Animal Kit not only introduces kids to soldering basics but also encourages creativity and imagination. This soldering kit offers a fantastic way for kids to learn while having fun. Features: Customizable animal characters and scenes Soft light RGB LED with nice transitions RoHs-free, soft edge PCB with immersion-gold, environment-friendly Battery life up to 48 hours Assemble Time: 2 hours Ages 6 and up Applications: This 4-Soldering Zoo Animal Kit is designed for creating simple circuits, introducing kids to the basics of circuitry and soldering It allows kids to play with LEDs, batteries, and bring zoo animals to life by soldering a LED and battery box on the back of each animal, making them blink immediately The kit offers a fun and educational way for kids to learn about electronics while engaging in a creative activity Ideal for use at home, in classrooms, or during after-school events, providing an engaging hands-on learning experience Kids can personalize the animals by decorating them with cute accessories, making each animal unique and perfect for display in a paper zoo or as pins