Handy LED flashlight

Product Description

This is a building kit for a simple, two-diode LED flashlight. Beyond its basic functionality, the assembled flashlight serves as an excellent introduction to the craft of soldering. The flashlight operates using three AAA (R03) batteries. A built-in button and switch allow users to either flash the light or keep it turned on continuously. The compact circuit board measures 40 x 83mm, making the entire flashlight small and comfortable to hold.

Specifications

• Two high-brightness, white LED diodes
• Continuous or alternate action
• Power consumption: 50mA
• Circuit board dimensions: 40×83mm
• Power supply: 3 × R3/AAA batteries (batteries not included)

Diagrams and Component Placement

Figure 1: Schematic Diagram
The schematic diagram illustrates the electronic circuit, showing connections for the battery (+BAT, -BAT, GND), switches (SW1, SW2), resistors (R1, R2, both 47Ω), and LEDs (LED1, LED2).

Figure 2: Position of Elements on Printed Circuit Board
This diagram indicates the placement of all components on the printed circuit board, aiding in assembly.

Photo 1: Position of Elements on Printed Circuit Board
A visual representation of the printed circuit board, detailing the arrangement of the battery holder, switches, resistors, and LEDs.

Photo 2: LED Diodes Positioning
This photo specifically highlights how to position the LED diodes, showing the anode (A) and cathode (K) terminals, and indicating the straight side of the LED for correct orientation.

Suggested Order of Assembly

• Resistors R1, R2: 47Ω (color code: yellow-violet-black-gold)
• LEDs LED1, LED2: 5mm white LED diode (note polarity)
• Switch SW1: Button
• Switch SW2: Slide switch
• Battery socket

Assembly Instructions

General Guidance: Begin soldering components onto the circuit board starting with the smallest ones. Pay close attention to the polarity and the placement of any notches on components marked with "❗". The circuit board itself may have frames indicating component symbols, which can be helpful.

1. Step 1: Touch the tip of the soldering iron to the end of the component near the soldering point.
2. Step 2: Apply tin solder.
3. Step 3: After the solder forms a cone, remove the tin solder first, then the soldering iron.
4. Step 4: The entire soldering process should take approximately 2-3 seconds.

Soldering Quality: Achieving a correct bond requires clean surfaces, adequate flux in the solder, a high temperature (320-360°C), and a sufficient amount of solder. Excessive solder can create a ball shape instead of a proper cone or bridge adjacent points. Inadequate temperature, solder quantity, or impurities can lead to "cold solder joints," which are fragile, prone to oxidation, and will eventually fail.

Important Notes and Safety Information

Product Usage: Educational Electronics Kits are designed exclusively for educational and demonstration purposes. They are not intended for commercial applications. Users are responsible for ensuring compliance with all local laws if used in such contexts. These kits must not be integrated into life support systems or any systems that could create a hazardous situation.

• Battery or wall adapters are generally safe devices and require no special attention unless connected to mains voltage outputs (e.g., relays).
• If the kit is used to switch currents exceeding 24V, installation must be performed by a trained professional and the kit must be housed in a safe-to-touch enclosure.
• Always adhere to the limits and ratings specified in the 'Specifications' section.
• Operation in schools or similar educational institutions must be supervised by trained and authorized staff.
• The product and its packaging are not toys. They pose risks such as choking hazards or electric shock to children.

Troubleshooting: Failures in modern electronic components are uncommon. Approximately 95% of non-working kits are attributable to poor soldering or incorrect component placement/orientation. Please review your work carefully.

Disposal: This symbol ♻️ indicates that the product should not be disposed of with regular household waste. Protect human health and the environment by handing over waste equipment to a designated collection point for recycling.

Manufacturer Information:

AVT SPV Sp. z o.o.
Leszczynowa 11 Street,
03-197 Warsaw, Poland
Website: http://avtkits.com/

Disclaimer: AVT SPV reserves the right to make changes without prior notice. Improper assembly, connection, unauthorized modification of components, or structural alterations may damage the device and endanger the user. AVT SPV and its authorized representatives are not liable for any damages arising directly or indirectly from the product's use or malfunction.