Laminated Copper Clad Prototype PCB Circuit Board 30x19cm

4N35 DIP Optocoupler 30V 60mA - features:
-NPN Phototransistor Optocoupler

Power Supply Transformer 220V AC/DC 2A 12V features:
- Input voltage: 100~240V 50Hz
- Output voltage: DC 12V
- Output current: 2A
- DC connector: 5.5 mm x 2.1 mm
- Cable length: Approx. 90 cm
- Indicator of operation: LED diode

Chemical substance for recording printed circuits and copper. Unlike ferric chloride, sodium persulfate is colorless, odorless, does not stain clothes and does not turn blue when it runs out. Easy to dissolve. It acts very regular with guarantee of contour sharpness. 

It has an Atmega2560 chip running at 16Mhz with a factory loaded bootloader with 54 digital input / output pins (from which 14 can be used as PWM outputs) and 16 analog inputs, 4 UART (hardware serial ports). The board includes a USB connector, an ICSP port, a reset button and some status LEDs. Atmega16U2 programmed as a USB-to-serial converter. Simply connect it to a computer with a USB cable or power with a power adapter and DC connector.

The USB (Universal Serial Bus), is an industrial standard bus that defines the cables, connectors and protocols used in a bus to connect , communicate and supply power between computers, peripherals and electronic devices.
This female type B USB connector adapter soldered on a PCB board is ideal for use in your projects.
It has connection points where you can easily solder some pins to connect it directly to a breadboard, or solder a cable over those same connection points.
USB Type B Female 2.0 Connector Adapter with PCB features:
- Connector type: USB Type B Female,
- Internal color: White,
- Nominal voltage: 30v DC,
- Maximum current: 1A DC,
- Insulation resistance: 1000Mohm,
- Operating temperature: -25ºC to + 85ºC,

WIFI transceiver based on the ESP8266 controller.
It has a microcontroller and 2 GPIO pins to be able to operate autonomously without the need for an external microcontroller. Characteristic: - Voltage of power: 3.3V
- Supported protocols: 802.11 b / g / n
- Network support: 2.4 GHz
- Band: 2400 (MHz)
- Wi-Fi Direct (P2p), Soft Access Point
- Integrated TCP / IP stack
- PLL, regulators and integrated power management units
- Output power: 0.15 (W); + 19.5dBm in 802.11b mode
- Consumption in low power mode:

LED Display 2-Digit 7-Segment Red Common Cathode features:
- Supply voltage of the segments: 3 VDC
- LED color of the segments: red
- Digit length: 14.2mm
- Digit width: 8.1mm
- Pin numbers: 10
- Diameter of pins: 0.51mm
- Step between pins: 2.54mm
- Consumption current per segment: 30mA
- Maximum admissible current per segment: 70mA
- Direct current by segment (pulse operation): 30mA
- Number of digits: 2
- Segment numbers by digit: 7
- Operating temperature: -25°C - + 85°C
- Storage temperature: -30°C - + 85°C
- Screen with common cathode connection
- Screen size: 25x19x8 mm
- This product is a 2-digit screen composed of 7 red LED segments with excellent brightness and features:.