User talk:Ch gmkmhfv

July 2018
Hello, I'm L293D. I noticed that you recently removed content from Opto-isolator without adequately explaining why. In the future, it would be helpful to others if you described your changes to Wikipedia with an accurate edit summary. If this was a mistake, don't worry; the removed content has been restored. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. L293D (☎ • ✎) 13:28, 5 July 2018 (UTC)