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EEVblog #908 – Zener Diodes

Fundamentals Friday. A tutorial on Zener Diodes. Avalanche breakdown, zener breakdown, zener effect, knee voltage, power dissipation, differences from regular diodes, calculating dropper resistor value, voltage regulation, clipping, clamping, transient surge overvoltage protection, characteristic curve, forward and reverse characteristics. Forum HERE Podcast: Download

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EEVblog #906 – Mailbag

More Mailbag Forum HERE SPOILERS: Amateur HAM Radio Study Guides from Dan Romanchik PCBite professional PCB holder Accurate panel meter Valve Bonanza Turns your PSU into a USB charger OP.A FM Synthesiser Arduino Shield Flip Dot Displays Lumintop TD16 1000 lumens Tactical Flashlight Torch: Worm AAA Keyring Torch Worm Brass …

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EEVblog #904 – Hewlett Packard HP85 Professional Computer

1979, a screaming 613KHz clock, killer graphics, and it’s a Hewlett Packard, it doesn’t get much better than this! Dave powers up the the classic HP85 Scientific / Engineering Professional Personal Computer and has a play around. Forum HERE Teardown VIDEO Repair VIDEO User Manual Pocket Guide Documents: Collection Manuals …

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EEVblog #903 – HP85 Vintage Computer Teardown

1979, a screaming 613KHz clock, killer graphics, and it’s a Hewlett Packard, it doesn’t get much better than this! Inside the classic HP85 Scientific / Engineering Professional Personal Computer. Forum HERE Using it VIDEO Repair VIDEO Podcast: Download

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EEVblog #902 – Solar Roadways Route 66 BUSTED!

There has been a ton of media hype about paving the famous Route 66 with the Brusaw’s Solar Roadways. Too bad it’s all over hyped bullshit. Note, the last 5 minutes is repeat material. Forum HERE One of Tunderf00t’s videos HERE Podcast: Download

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EEVblog #901 – Raspberry Pi 3 Photoflash Problem

The Raspberry Pi 3 has the same Xenon photoflash reset problem as the RPi2 (albeit at a much reduced level) There is also a photoflash problem with the Broadcom BCM43438 WiFi & Bluetooth chipset. The internet connection will lockup when exposed to sufficient Xenon flash light. The flash problem explained …

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EEVblog #900 – STM32 ARM Development Board

Dave takes a look at the ST STM32 L1 series low power ARM chips, and gets a cheap STM32L152C development board up and running with the IAR Embedded workbench compiler and STLINK/V2 interface. Also a look at the STMcubeMX code initialisation application. 32L152CDISCOVERY Schematic & User Manual PIC32MX Forum HERE …

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