Forum Topic: http://www.eevblog.com/forum/blog-specific/eevblog-354-cityrail-pa-amp-teardown Teardown Tuesday. What's inside an Sydney CityRail Train PA Amplifier. And an extensive tutorial on the design of the power amplifier system from the designer himself, Doug Ford: http://www.dfad.com.au EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: ... https://www.youtube.com/watch?v=NsOfgvbZQo0

In this tutorial Dave demonstrates the seldom used and often little understood mathematical integration function available on your modern digital oscilloscope. And demonstrates a practical example use for it in accurately measuring the total power consumption of a microcontroller that sleeps and then wakes up and does some processing before shutting down again. By getting the total area under the current curve. Forum: http://www.eevblog.com/forum/blog/eevblog-662-how-why-to-use-integration-on-an-oscilloscope/ EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 EEVblog Amazon Store (Dave gets a cut): http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ ... https://www.youtube.com/watch?v=Dh0xYu8YvaE

Dave unboxes a random bit of gear from ebay. What is it? Spoiler: http://bit.ly/11lzphL Forum Topic: http://www.eevblog.com/forum/blog/eevblog-450-ebay-unboxing/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 ... https://www.youtube.com/watch?v=bfp0QnQujvs

More Mailbag! Ohms Per Square Sheet Resistance video: https://www.youtube.com/watch?v=ME4Xe53TMxI Thermocouple Tutorial Video: https://www.youtube.com/watch?v=AYblSfpKRUk Forum: https://www.eevblog.com/forum/blog/eevblog-1244-mailbag/ SPOILERS: Mailbag SPAM! Arizona If it smells like chicken, you're holding it wrong. 2:57 https://www.tympan.org Open source hardware audio hearing development system. 11:20 Circuit Scribe conductive ink learning kit https://www.circuitscribe.com/ 24:20 Sony RM-440 video editing unit teardown 30:42 Pulse Sensor https://www.pulsesensor.com 31:36 DIY Mouse Kit https://github.com/biomurph/Mouse 32:26 DIY OpenHak open source Fitness tracker https://www.openhak.com 36:34 Faber Castell TR3 scientific calculator and slide rule 42:22 Thermocouple Raspberry Pi Hat http://www.scientificdatasystems.co.uk 46:35 Casio FX-82 Calculator #OpenSource #Hearing #Fitness Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3 ... https://www.youtube.com/watch?v=Uib8nUV1JEg