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Resistor 0603 1k ohm with precision of 5%.

Optocoupler 4N35 is a device that electrically (by light, not by electricity) separates the two parts of the circuit. That means, if a short circuit occurs  on one part of the circuit or any kind of other error that causes malfunction of components, there won’t be any malfunctions to the second part of the circuit because there is no way (since they separated by light) to transfer the error.

To sum it up, this optocoupler is very common and generally, it can be used for all applications.

Come on, everyone knows what the NE555 is! It is unlikely that we could make anything in our store without it, since it is inevitable in any kind of education, and is also able to solve the “time” problems in any type of assembly. It is a timer and can be used to create a pulse oscillator, delays …

The ceramic antenna at a frequency of 1575.42MHz corresponding GPS. Ideal with our SIM808 breakout.

18650 battery holder allows easy use of lithium batteries in 18650 packaging. Otherwise, soldering these types of batteries is not recommended because the high temperature makes them lose their capacity. If you do not have a spot welding machine, we recommend that you get this kind of battery holder and you won’t have any problems with the loss of capacity, and it will allow you to use the batteries easily.

Reed switch is a switch that is activated within the range of the magnetic field. Within its glass capsule, it has two metal wires that will move when they are near the magnet and thus “activate” switch.

Set of cables designed to connect to the experimental board. These wires aren’t as flexible as our classic set of cables and they are cut in a variety of lengths. Using these wires, your breadboard will look very neat!

The Vibration sensor SW-18020P is a compact, non-directional spring-type switch for detecting movement, impact, or shaking. Operating as a normally open (NO) switch, it closes momentarily when vibrations exceed a threshold, providing a simple digital on/off output. Its robust design ensures reliable performance in demanding environments, while its small 4.5mm × 10mm footprint allows easy integration into space-constrained projects.
 
The sensor requires minimal circuitry, just a pull-up or pull-down resistor for stable operation, and responds quickly to low-frequency vibrations. Its sealed construction protects against dust and moisture, making it a durable, low-cost alternative to more complex accelerometers.
 
Ideal for tamper detection, anti-theft alarms, smart home devices, or motion-activated features, the SW-18020P is compatible with all standard microcontrollers, including Arduino and Raspberry Pi. Integrate it on breadboards or PCBs easily, and consider using a Qwiic adapter for simplified wiring. Add this reliable vibration sensor to your next project for accurate, cost-effective motion detection.

LM358 is probably the best known and most frequently used operational amplifier. One pack contains two op-AMPs, but one can be used as a buffer, and one to increase its voltage. It is very convenient and easy to use. Also, this is a dual supply op-amp, which means you can turn up positive and negative voltages.

This Protoboard 12×8 cm is a durable, high-quality prototyping board ideal for moving from breadboard testing to permanent circuit construction. Measuring 120×80 mm, it provides ample space for complex projects, supporting engineers, hobbyistsin building reliable, long-lasting electronic devices. Its robust construction ensures stable soldering and performance across a wide range of applications.
 
Made from fibreglass with a standard pre-drilled grid, the board features a solder mask on both sides to prevent bridges and improve reliability. Silkscreened row and column markings simplify component placement and debugging. Its generous size accommodates numerous I/O pins, power circuits, and multiple ICs, while remaining suitable for enclosures.
 
Perfect for custom shields, permanent prototypes, or small-scale production, the Protoboard 12×8 cm supports through-hole components and can adapt to SMD parts via breakout adapters. Add this versatile board to finalize your project with a clean, professional, and dependable platform.

Classical male header with 2.54mm pin spacing (0.1 ‘). 40-pin.

The AMS1117-3.3V is a linear voltage regulator designed to provide a stable 3.3V output from a wide input voltage range of 4.4V to 12V. This component is perfect for powering sensitive electronics, microcontrollers like Arduino boards, and various IoT devices that require a consistent 3.3V supply. Its design ensures efficient power conversion, making it a great piece for both hobbyist and professional electronic projects.

Packaged in a compact SOT-223 SMD form factor, the AMS1117-3.3V is suitable for space-constrained applications. It delivers a maximum output current of 1A, providing ample power for most low-power digital circuits and sensors. The simplicity of its operation, combined with its high performance, makes it an excellent choice for designers looking for an effective voltage regulation solution.

Our AMS1117-3.3V regulator comes with technical support and a 2-year warranty. Whether you’re building a new prototype, repairing existing equipment, or integrating it into a complex system, this voltage regulator provides the stability and performance you need. Detailed specifications and application notes are available in the datasheet for seamless integration.

25x 330ohm resistor (for LEDs)

15x 10k resistor (pull-up/pull-down)

They say that whoever works – makes mistakes. Well so do we! We have an old circuit board that we rest from unsuccessful projects or are simply a bug. There has excess PCBs of prototype products or serial products that are no longer manufactured. You will find everything, not necessarily functional 🙂

Use these chips to practice soldering on them, like a keychain or decoration for the wall. Give them to a friend. Make your next project on them. Let your imagination run wild 🙂

Note: Do not take these printed circuit boards as functional. We can not offer technical support for them. Some of them may have a number of brazed components.

Classic NPN SMD transistor.