PCB board Size: 52.3MMx80MM. jumper selectable by an external crystal at different frequencies;. Otherwise deal is final. All products are quality checked. We will be happy to resolve any issues you may have in a cordial and friendly manner.
eBay
10/20pcs Passive Buzzer，Active Buzzer 12*9.5mm mini ,5V Magnetic Long Continous Beep Tone Alarm Ringer for ATmega328P
Aliexpress UK
The standards for functional safety depend on the market that is targeted. Many standards support multiple levels of rigorousness, which are applied depending on the likelihood and severity of the hazard.
eBay
Pro Mini ATMEGA328P Development Board - 5V/16MHz or 3.3V/8MHz with Bootloader, Compatible with for Arduino
Aliexpress UK
Not only is it quite compact, but the design is really elegant. AVR Series Standard ISP download interface. With 500mA over-current protection self-recovery fuse, and complete protection of expensive computer motherboard.
eBay
5PCS Mini / Type-C / Micro USB Nano 3.0 With the bootloader compatible Nano controller for arduino CH340 16Mhz ATMEGA328P
Aliexpress UK
•On-chip Flash. Surface Mount. Single Board Computers. 16 bit, 8 bit. 2(6 x 8 bit), 6 x 16 bit. 1 x 16 bit, 2 x 8 bit. 8 x 10 bit. Maximum Frequency.
eBay
Official UNO R3 ATMEGA16U2 / UNO+WiFi R3 ATMEGA328P CH340G For Arduino UNO R3 Development Board WeMos ESP8266
Aliexpress UK
Estardyn UN0 R3 Board ATmega328P Development Board with Pin Header and Cable Compatible with Arduino IDE Projects
Aliexpress UK
1-10PCS UNO R3 (CH340G) MEGA328P Chip for Arduino UNO R3 + USB/TYPE-C CABLE ATMEGA328P-AU Development Board 16Mhz
Aliexpress UK
Ultra Small for Arduino Nano Mini Development Board with Type-C ATMEGA328P Chip CH340 Serial Port for Electronics Projects
Aliexpress UK
1PCS NANO V3.0 3.0 Controller Terminal Adapter Expansion Board NANO IO Shield Simple Extension Plate For Arduino AVR ATMEGA328P
Aliexpress UK