This is a breakout board for Freescale’s MPR121QR2. The MPR121 is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode. The MPR121 also features eight LED driving pins. When these pins are not configured as electrodes, they may be used to drive LEDs.

MF RC522 is a highly integrated read and write card chip applied to the 13.56MHz contactless communication.It is a low-voltage, low-cost, and small-sized non-contact card chip, a best choice for intelligent instrument and portable handheld devices. The MF RC522 uses advanced modulation and demodulation concept which fully presented in all types of 13.56MHz passive contactless communication methods and protocols. In addition, it supports rapid CRYPTO1 encryption algorithm to verify MIFARE products. MFRC522 also supports MIFARE series of high-speed non-contact communication, with a two-way data transmission rate of up to 424kbit/s. As a new member of the 13.56MHz highly integrated reader card series, MF RC522 is much similar to the existing MF RC500 and MF RC530 when there are also great differences. It communicates with the host machine via the serial manner which needs less wiring. You can choose between SPI, I2C and serial UART mode (similar to RS232), which helps reduce the connection, save PCB board space (smaller size), and reduce cost.

'-24V 1-Channel Relay interface board, and each one needs 50-60mA Driver Current. -Equipped with high-current relay, AC250V 10A ; DC30V 10A. -Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic). -Indication LED’s for Relay output status.

Cable specs: -Stainless steel tube 6mm diameter by 30mm long. -Cable is 36" long / 91cm, 4mm diameter. -Contains DS18B20 temperature sensor. -If your sensor has four wires - Red connects to 3-5V, Black connects to ground and White is data. The copper wire is soldered to the wire shielding. -If your sensor has three wires - Red connects to 3-5V, -Blue/Black connects to ground and Yellow/White is data. DS18B20 Technical specs: -Usable temperature range: -55 to 125°C (-67°F to 257°F). -9 to 12 bit selectable resolution. -Uses 1-Wire interface- requires only one digital pin for communication. -Unique 64 bit ID burned into chip. -Multiple sensors can share one pin. ±0.5°C Accuracy from -10°C to 85°C. -Temperature-limit alarm system. -Query time is less than 750ms. -Usable with 3.0V to 5.5V power/data.