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It could be a fan, an alarm light, or anything. In this video we build a circuit using some very interesting components, such as the LM35 (which we saw in the previous video) and the LM358, a very easy to use amplifier and comparator. Although simple, this is a very cool circuit to build and see working, as well as extremely useful. I hope you like it and THANKS! Circuit drawing: https://canaleet.blogspot.com.br/2017... Heat Gun: https://www.banggood.com/DANIU-220V-3... LM 358: https://www.banggood.com/3-Pcs-LM358P... LM35: https://www.banggood.com/5Pcs-LM35DZ-... https://www.banggood.com/EXCEL-DT9208... Be a contributor, help with subtitles and translations of videos: http://www.youtube.com/timedtext_cs_p... Subscribing to the channel costs nothing for you and helps promote the channel. Help keep the channel from dying by subscribing and giving your like. Thanks! Subscribe: https://www.youtube.com/c/eletronicae... Thank you to everyone who contributes to this Electronics and Technology Channel community. More project details: http://canaleet.blogspot.com.br/ More videos at: / eletronicaetecnologia Send a photo of your assembly for us to publish, e-mail: [email protected] Want to promote your product, send an e-mail to [email protected] To send products for review or support the channel: Post Office Box 21214 Zip Code: 91310-971 Legal notice All information obtained on this website and social media pages related to it are for INFORMATIONAL purposes only. Canal Eletrônica e Tecnologia is NOT responsible for any damage or loss caused by the execution of actions related or not to the content described here. Always look for a qualified professional, follow the rules and use protective equipment for any work involving electricity.