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Awesome and fun, for adults and kids, this is a seasonal must if you're into your electronics and gadgets. This circuit is composed of 16 pcs LED (light emitting diode). The 16pcs LED divided into four groups, and each group has different flashing frequencies, when four groups flash together, this item looks like a small Christmas tree. The circuit is powered by a 9V battery.

Specifications

This circuit is simple and practical, low power consumption. It uses integrated circuits for driving: fewer parts, and the line is simple and easy to understand.

External Wiring Kit

With USB plug for easy replacement of parts at any time and conducive circuit debugging. Also allows us to deepen our understanding of the principles of the circuit in the debugging process.

 This project is in the form of an oscillation circuit by the cycle generated by the following principles:

• After the first charge, the capacitor C1 & C4 charging is complete.
• Capacitors C2 & C3 will continue to charge.
• When the transistor Q1 & Q4 is turned on at the same time, it discharges the capacitor C1 & C4.
• Capacitors C2 & C3 is fully charged, the transistor Q1 & Q4 will be closed, while also charging the capacitor C1 & C4 again.
• Transistors Q2 & Q3 is turned on while the capacitor C2 & C3 will be discharged.
• By analogy, the flash of speed is the oscillation frequency, and the frequency is determined by the resistor R & capacitance C values.

What's in the box ?

The below pic shows the parts in this DIY kit

• Type: Aluminum heat sink
• Size: 19x19x24mm
• Material: high quality aluminum
• Colour: Black
• Application: Heat dissipation on SOCs, Memory Chips, Electronic components
• Weight: 6g

• Tiny size & solidly built
• Well made terminal block
• Legible miniscule printing of the labels of each of the GPIO pin's function
• Secure connection to the Raspberry Pi
  

1 x Terminal block
1 x Screwdriver
1 x Acrylic board
2 x Nuts
2 x M2.5x11 brass standoffs
4 x M2.5x5 6 brass standoffs
6 x Screws

Resources 

Wiki - Raspberry Pi GPIO Terminal Board

(* Raspberry Pi NOT included - ONLY GPIO screw terminal*)





(* Raspberry Pi NOT included - ONLY GPIO screw terminal*)

• HDMI
• 1080p
• female to female
• black
• extension adapter

Heat-shrink tubing is a shrinkable plastic tube used to insulate wires, providing abrasion resistance and environmental protection for stranded and solid wire conductors, connections, joints and terminals in electrical work.

Specifications

Shrinkage Ratio: 2:1 (will maximum shrink to 1/2 its supplied diameter)
Cutting method: Scissors or sharp knife

What's in the box?

1 x 1m heat shrink tube

Ring terminals connect two or more wires to a single connection point, by fitting the open face of the terminal over a stud. They create a solid connection as the ring that is fitted over the stud cannot come loose or fall off. This removes the possibility of the ring terminal disconnecting. They are widely known for the semi-permanent connections that they create. To make ring terminals even better, they can easily be used with two or more wires depending on the application. Ring terminals are the most secure type of tongue style terminal available and are commonly chosen for their durability, ease of use, and longevity in tough conditions.

Specifications

• Conductor cross section: 0.5-1.5 mm2
• Bolthole: 4mm

What's in the box?

1 x pack of 10 lugs

You will find our lugs selection here

Female Spade lugs provide a quick and reliable solderless electrical connection. These single conductor connectors are made to connect with a predefined connector size or male quick connects.

Specifications

Conductor cross section: 0.5-1.5 mm2

What's in the box?

1 x pack of 10 lugs

You will find our lugs selection here

Female Spade lugs provide a quick and reliable solderless electrical connection. These single conductor connectors are made to connect with a predefined connector size or male quick connects.

Specifications

Conductor cross section: 0.5-1.5 mm2

What's in the box?

1 x pack of 10 lugs

You will find our lugs selection here

Ring terminals connect two or more wires to a single connection point, by fitting the open face of the terminal over a stud. They create a solid connection as the ring that is fitted over the stud cannot come loose or fall off. This removes the possibility of the ring terminal disconnecting. They are widely known for the semi-permanent connections that they create. To make ring terminals even better, they can easily be used with two or more wires depending on the application. Ring terminals are the most secure type of tongue style terminal available and are commonly chosen for their durability, ease of use, and longevity in tough conditions.

Specifications

• Conductor cross section: 1.5-2.0mm2
• Bolthole diameter: 4mm

What's in the box?

1 x pack of 10 lugs

You will find our lugs selection here

Fork Terminals are a type of connector used to attach a wire or wires to a stud, bus bar, or another part of an electrical system.

These Lugs are insulated to ensure safe and secure connections to an electrical device.

Specifications

• Conductor cross section: 1.5-2.5 mm2
• Bolthole diameter: 4mm

What's in the box?

1 x pack of 10 lugs

You will find our lugs selection here

Joiner Terminals are a type of connector used to attach a wire or wires to a stud, bus bar, or another part of an electrical system.

These Lugs are insulated to ensure safe and secure connections to an electrical device.

Specifications

Conductor cross section: 1.5-2.5 mm2

What's in the box?

1 x pack of 10 lugs

You will find our lugs selection here

Specifications

• Voltage: DC 5V 
• Colour: RGB 
• Outer radius of 2 x 28mm
• Inner radius of 2 x 8mm 

Please note: Soldering will be required to connect your wires
 
What's in the box?
 
1 x 8 Bit WS2812 5050 RGB LED Driver Development Board

• Brand: CHANZON
• Lens Size: 5mm Diameter
• Lens: Colour Lens
• Emitting Colour: Green Flash
• Viewing Angle: 20 Degree (Colour Lens)
• Forward Voltage: 3.0-3.2V
• Current: 20mA
• Frequency: 1.5HZ
• Flicker Frequency: 90 Times / Minutes
• Polarity: Anode (Longer Leg) | Cathode (Shorter Leg)

• Brand: CHANZON
• Lens Size: 5mm Diameter
• Lens: Colour Lens
• Emitting Colour: Red Flash
• Viewing Angle: 20 Degree (Colour Lens)
• Forward Voltage: 3.0-3.2V
• Current: 20mA
• Frequency: 1.5HZ
• Flicker Frequency: 90 Times / Minutes
• Polarity: Anode (Longer Leg) | Cathode (Shorter Leg)

The LM35-series devices are precision integrated-circuit temperature sensors, with an output voltage linearly proportional to the Centigrade temperature. The LM35 device has an advantage over linear temperature sensors calibrated in Kelvin, as the user is not required to subtract a large constant voltage from the output to obtain convenient Centigrade scaling. The LM35 device does not require any external calibration or trimming to provide typical accuracies of ± ¼ °C at room temperature and ± ¾ °C over a full −55°C to 150°C temperature range. Lower cost is assured by trimming and calibration at the wafer level. The low output impedance, linear output, and precise inherent calibration of the LM35 device makes interfacing to readout or control circuitry especially easy. The device is used with single power supplies, or with plus and minus supplies. As the LM35 device draws only 60 μA from the supply, it has very low self-heating of less than 0.1°C in still air. The LM35 device is rated to operate over a −55°C to 150°C temperature range

Features

• Calibrated Directly in Celsius (Centigrade)
• Linear 10-mV/°C Scale Factor
• 0.5°C Ensured Accuracy (at 25°C)
• Rated for Full −55°C to 150°C Range
• Suitable for Remote Applications
• Low-Cost Due to Wafer-Level Trimming
• Operates From 4 V to 30 V
• Less Than 60-μA Current Drain
• Low Self-Heating, 0.08°C in Still Air
• Non-Linearity Only ±¼°C Typical
• Low-Impedance Output, 0.1 Ω for 1-mA Load

Applications

• Power Supplies
• Battery Management
• HVAC
• Appliances

What's in the box?

1 x LM35DZ temperature sensor

This module is the perfect starting point if you are looking to build your own power bank.

This module is ideal for 18650 batteries, 65mm long with the flat top. In the event that you use:

• old batteries
• different capacities
• differnet brands

Please ensure that they are at least above 3.5V each

Not ideal to be used on batteries that have been too far depleted.

After the battery is installed, plug in the charger to activate the battery before use.

The real world conversion rate of a new "real capacity" battery is about 80%. Because there is a line loss of the connection line. Estimation of mixed batteries or "budget" batteries are near impossible to estimate.

For peak use, first allow the battery to fully discharge before charging it.

Note: Reversing the polarity of the battery will burn the module.

Specifications

• Switch Charging
• Internal 2A charging current
• Charging efficiency up to 90% @ 2A
• Charging swtch frwquency 1MHz
• Trickle/constant current/constant voltage three-stage charging
• Charging current Adaptive adapter function
• Charging current Temperature adjustment function, charging current automatically decreases with the increase of temperature
• C/10 charging terminates
• Intergrated charge overvoltage protection and battery overtemperature protection
• Synchronous boost output 5.1V
• Discharge switch frequency 50OKHz
• Discharge efficiency up to 94%
• Automatic identifiation of load, load automatically shut off
• Original boost output heat regulation function
• Protection of over current, short circuit, over voltage and over tepmperature of discharge module
• Long press the switch, wake up the motherboard, charge the charging time of the phone, press the switch, the output can be turned off, the motherboards stops working.
• MaIn board size: Thickness 9 * Width 25 * length 67 mm

What's in the box?

1 x Power bank type charging module