In order to upload to an Arduino board via a serial port, the upload tool (e.g., AVRDUDE) must be able to open the port. This is not possible if another process already has control of the port.

というわけでJAMMAからVGAを分配する中間コネクタを作成してたら副産物として垂直同期信号を出力できるようになったのでついでに垂直同期信号によって完全にシンクロしたコマコンを作ろうかなと 現時点ではアイデアを整理している状態なので各種AIを ...

[psgarcha] took a year-old Arduino Uno on an international trip and upon returning found something was wrong. Every time he would try to upload, he would get the dreaded avrdude error, ‘stk500_getsync ...

Hi, I am using GT-U8 gps module from here to interface with Arduino Mega 2560 R3. It needs a logic level converter and I am using TXS0108E 8-Bit Bi-Directional Logic Level Converter. I am using pin 19 ...

The Z80 is one of those old CPUs that is both obtainable and easy to work with — at least in some versions. [Doctor Volt] put together what may be the simplest possible setups to get a working Z80 ...