Arduino Nano USB Microcontroller v3 — Unsoldered (China)

The Arduino Nano USB Micro­con­troller is a bread­board ready ver­sion of the Arduino Mini 05 Micro­con­troller Mod­ule with inte­grat­ed USB. The Nano has more ana­log input pins as com­pared to most Arduino boards and an onboard 5V AREF jumper. The Nano auto­mat­i­cal­ly sens­es and switch­es to the high­er pow­er pow­er sup­ply, so there is no need for a pow­er select jumper. The nano’s pin lay­out works well with the Mini or the Basic Stamp (TX, RX, ATN, GND on one top, pow­er and ground on the oth­er). The Arduino Nano Micro­con­troller can be pow­ered via the mini‑B USB con­nec­tion, 6–20V unreg­u­lat­ed exter­nal pow­er sup­ply (pin 30), or 5V reg­u­lat­ed exter­nal pow­er sup­ply (pin 27). The pow­er source is auto­mat­i­cal­ly select­ed to the high­est volt­age source. The pack­age con­tains only the micro­con­troller.Fea­tures: • Auto­mat­ic reset dur­ing pro­gram down­load • Pow­er OK blue LED on the bot­tom • Green (TX), red (RX) and orange (L) LED •  5V to AREF jumper • Auto sensing/switching pow­er input • Small mini‑B USB for pro­gram­ming and ser­i­al mon­i­tor (cable not includ­ed) • ICSP head­er for direct pro­gram down­load • Pow­er OK blue LED on the bot­tom • Stan­dard 0.1″ spac­ing DIP (bread­board friend­ly) • Man­u­al reset switch Spec­i­fi­ca­tions:Micro­con­troller: Atmel ATmega328 • Oper­at­ing Volt­age (log­ic lev­el): 5 V • Input Volt­age (rec­om­mend­ed): 7–12 V • Input Volt­age (lim­its): 6–20 V • Dig­i­tal I/O Pins: 14 (of which 6 pro­vide PWM out­put) • Ana­log Input Pins: 8 • DC Cur­rent per I/O Pin: 40 mA • Flash Mem­o­ry: 32 KB (of which 2KB used by boot­loader) • SRAM: 2 KB • EEPROM: 1 KB • Clock Speed: 16 MHz • Dimen­sions: 0.70″ x 1.70″