Author: Frank

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Picam Time Lapse Night Video

Introduction The Camera RASPIVID Command Resolution Automatic White Balance Auto Exposure and ISO Contrast and Brightness Profile, Intra Refresh Period, Quantization Parameter, and Bit rate Shutter Speed and Video Length Putting the h264 Video...

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UVC Lamps, Part 3: Photodiode Measurements

Introduction Photodiodes Transimpedance Amplifier Sensor Assemblies Method 36 Watt Rated Lamp Results 6 Watt Rated Lamp Results Photodiode Comparisons Internal Reflection – Source of High Reading Photodiodes How Is Responsivity Measured? Reflections Inside the...

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DIY Disinfection Chamber

Method What is sufficient dose? Low cost disinfection chamber Operation Safety UVC LED lamps Misleading CDC information Design Calculations and Adenovirus Inactivation Method Very short wavelength of UV light, labelled UVC, has long been...

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Internet Security: SSL/TLS

Elsewhere at this site I have described the GATT Client MQTT Gateway project. There a BLE (Bluetooth Low Energy) server (peripheral device) communicates data to a BLE client (central device) that also acts as...