Solar charger USB DC mobile power supply

The PCF8591 is a low-power 8-bit single-chip, single-chip, 8-bit data acquisition device with four analog inputs, an analog output, and an I2C serial bus interface.
Three address legs A0, A1 and A2 are used to program the hardware address, allowing the use of up to eight devices connected to the I2C bus without additional hardware.
Address, control and data to and from the device are transferred in series through the two-way bidirectional I2C bus. Analogue to Digital Converter PCF8591T features:
- Main chip: PCF85911
- Operating voltage supply: 2.5 - 6 V
- Low standby current
- Serial input / output through the I2C bus
- 3 hardware address pins A0, A1, A2
- Sampling speed given by the I2C bus speed

2 Double Side Prototype PCB Board 6x8cm features:
-Thickness of PCB: 1.6mm
-Material: high quality FR-4 glass fiber PCB
-Presented and numbered on both sides
-Top and bottom are identical copper layers
-Pads grid (pitch) 2.54mm/0.1", hole diameter 0.9mm

Draw circuits, sensors or simply replace wires with this electrically conductive paint. Stimulate children's creativity and manual skills, with the assembly of simple and safe circuits, thanks to this conductive paint. This electrically conductive paint can be used mainly for repairing breaks, cold welding or drawing circuits on a small scale, and also for silk-screen printing and stenciling.

One 50 ml bottle can cover up to 0.8 m².

It is as easy as drawing a line of paint on a surface with a brush, such as paper, plastic, textiles or wood, connecting components and power, and you have an electrical circuit in a completely original way.

ESP32 processor development board with WiFi and Bluetooth (BLE) compatible with Arduino Uno shields. It is much faster than the ESP8266 processor (NodeMCU and the like) . Wemos D1 ESP32 R32 WROOM-32 WiFi and Bluetooth features:
Power: 5-12VDC WiFi 802.11 b / g / n / e / i (802.11n up to 150 Mbps) Bluetooth v4.2 BR / EDR and BLE. Compatible with Arduino Uno shields. 6 Analog input. 20 digital inputs / outputs (3.3V) (with PWM functions, interrupt). UART, SPI, I2C communication. Size: 68Ã — 53 mm Micro USB connection. 4Mbytes Flash Memory 520Kb Clock: 240Mhz (a core dedicated to WiFi processing) Temperature: -40C + 85C Current: 250mA (max) Current in saving mode: 0.15mA Operating current: 20mA (without WiFi) Useful links for Arduino / Raspberry programming and projects with Arduino /

Build a city of paper, and make its lighting circuits by discovering the magic of this electrically conductive painting. Stimulate the creativity and manual skills of children aged 12 and over, with the assembly of this paper illuminated city. 

As easy as squeezing the tube, drawing a line of paint and folding the paper templates, you can now control the lighting of this circuit.

Mini Speaker 40mm Diameter 3W Impedance 4 Ohm MP3 features:
- Power 2-3W
- Diameter: 40mm
- Impedance: 4 Ohm
- Quantity: 1 unit

15x Electrolytic Capacitor 1uF 50V 105º C PIC Arduino features:
-Type: Electrolytic Capacitor
-Assembly: intern
-Value: 1uF
-Maximum tension: 50V
-Maximum temperature: 105º C
-Dimensions: 5x11mm
-Quantity: 15 units