DS1302 Real Time Clock RTC Module AVR ARM PIC

Buzzer alarm to convert electrical to acoustic signals in robotics devices and Arduino projects.
Buzzer 5V Active Buzzer 4 to 7V DC features:

- Input voltage: 4V to 7V
- Diameter: 12mm
- Height: 9.5mm
- Spacing Pins: 7.6mm
- Maximum Current:

 M12 High Resolution Lens, 12MP, 69.5° FOV, 8mm Focal length, Compatible with Raspberry Pi High Quality Camera M12. Long Focal Length.

This module works under the characteristics of the integrated ISD1820 and allows you to make recordings of multiple messages or the reproduction thereof, it performs a non-volatile storage. Voice Recording and Reproduction Module ISD1820 features:
- Working voltage: 2.4 - 5.5 VDC
- Model: I073103
- Voice Recorder Chip ISD1820
- Automatic ignition mode dwon
cording duration: 8-20 seconds
- Manual or Automatic Control with an MCU
- With internal audio amplifier, this board can drive 8 ohm 0.5W speaker directly
- Includes a microphone on board to record directly
- The sampling frequency and duration can be different if a single module resistance is changed
- High quality, restored natural voice, can be used as a speaker module

NRF24L01 Adapter + Socket Wireless Transceiver 2.4GHz features:
- The NRF24L01 + module is powered with 3.3V
- This adapter module includes a 3.3V voltage regulator
- You can connect the NRF24L01 module on it at 5V voltage
- Dimensions of PCB: 25x 18mm
- Quantity: Adapter 1 unit

USB DC 5V Bluetooth Audio features:
- You can connect it with your smartphone
- Power: DC 5V micro USB
- Speaker: 4 ~ 8 Ohm - Audio Jack: 3.5mm
- SD card: support MP3 / WMA / WAV / FLAC format
- The transmission distance could be up to 10m
- Size: 50 x 40 mm

This fingeprint scanner from ADH-Tech combines a highly precise fingerprint sensor module with an onboard MCU and UART interface enabling trivially very connection to any project.

The scanner independently reads and analyses the fingerprint thanks to an MCU algorithm that can send a converted digital signal to a peripheral serial interface for a data read. The onboard MCU algorithm enables operations such as for example a fingerprint enroll.

- Bluetooth 4.0 AT-09 BLE Master / Slave module with 6-pin connection base
- This module is very similar to HM-10 module
- Bluetooth protocol: Bluetooth V4.0 BLE specification
- Ultra-low power consumption, in 90uA standby mode
Wireless Module AT-09 Bluetooth 4.0 CC2541 IOS BLE features:

- Chipset based on CC2541
- Bluetooth Class 2
- Industrial level Bluetooth module SPP
- Flash 256Kb
- Integrated chip antenna
- Power supply: + 3.3 VDC 50 mA
- Working temperature: -5 C to + 60 C
- Operating frequency: 2.4 GHz ISM Band
- Modulation method: GFSK (Gaussian Frequency Shift keying)

NRF24L01 Shield Atmega48 Wireless Module SPI To IIC I2C TWI Interface features:
- Operating voltage: 5V
- Wait time of the module receives the data: more than 2S
- The waiting time of the module sends data: more than 300
- Transfer speed: 50 Byte / S (theoretical value)
- I2C / TWI address: 0 x 47 (decimal 35)
- Address NRF24L01: 0 x 34, 0 x 43, 0 x 10, 0 x 10, 0 x 01 (from lowest to highest)
- Size: 44 x 23 mm

Characteristic:
- Channels: 4 (independent protected by Optocouplers)
- Supply Voltage: 5V
- Output Current: 10A
- Relay activation current: 15mA ~ 20mA
- Isolation: Yes
- Indicator LED: For each channel
- Dimensions: 54x 72mm
- 5V Optocoupled 4-Channel Relay Module
- This module can be directly controlled by the microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL)
Useful links for Arduino / Raspberry programming and projects with Arduino / Raspberry boards:
User manual for the remote control + 4-channel 315 MHz IC2262 receiver:
- Relay Module Programming 5V 10A 4 Channel with remote control + 4 channel receiver