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(There's a shortage of detailed text in this page used in a live presentation) Until the Covid-19 Vaccine is available in 12-18 months, we are all at risk. Early statistics suggest the death rate from Corona is 20 times that of the Flu. 50 Million were quarantined by the Chinese government, some dragged out of their homes.  World Health Organization provided test kits to 60 countries, the U.S. declined. 124 hospital workers Quarantined after 1 Corona related case was treated at their Hospital . U.S. needs 10X the existing number of ventilators (700k) and 2X intensive care beds. Report to CDC: travelers with specific symptoms arriving from China:    Feeling feverish, or has an actual measured temperature of 100.4°F [38° C] or higher) One means of mass Infection screening is,  Fever Temperature Detection using a Thermal Camera. Airports have used these systems to screen passengers during several infectious diseases outbreaks. There ma...

Live Video Holographic LED Fan DseeLab   HDMI Halo Fan demo Leapmotion?                 Two project ideas: Whining Dog Detector Guardians of the Everglades reality series   Catching big one 2:47  "Hurricane Andrew freed 900 young Burmese Pythons from a breeding facility in 1992"  "There is now population estimated at 300,000"  Over 95% of several native mammal species have been wiped out from the Everglades.  The water district is paying hunters about $8.50/hr   bonuses reported in the show: $50 for a baby, $200 for a 10 footer.     Two Python Snake Detection Methods     Fixed camera machine vision motion detector, distinguishing the characteristics    of a moving snake from wind blown grass.       Python marking recognition machine vision from drone , (or sattalite)     their camou...

Chanukah Display 2019 Two displays total over 4,500 NeoPixel LEDs.  (Built to survive 60 MPH winds).   Each display is controlled by a Teensy 3.2 paired with an OCTO Shield. Minorah Car Parade in LA  Razzler: POV LED Top 2018     Uses STM32 processor and MPU-6050 to get Angular Velocity  Wood Milling required, NO? Design Files. https://nathanpetersen.com/2018/05/15/razzler-pov-led-top/ https://www.hackster.io/nathanpetersenn/razzler-pov-led-toy-top-4fee5c Onstar like service for Cyclists  Using a (mainly) European sigfox.com data messaging cloud service, whose coverage map serves major U.S. cities and the ocean off the coast of L.A. extending past Catalina.  Typical; service fee for 50 (12-bytes) messages a day: $22 a year. The Arduino MKR board for this service is currently sold in Europe only. More Example Projects  Those other IO pins on 32 Bit Processors I2S   Fa...

 New "World's fastest compact microcomputer" The Teensy 4.0   $19.95              ARM Cortex-M7 processor at 600 MHz, contained in NXP iMXRT1062 chip Executes 2 instructions at a time (about 40% to 50% of the time compiled by TeesyDuino),   Employing tightly coupled split memory with 2 64 bit paths.. FPU handles Double Integers as well as Floats 1024K RAM (512K is tightly coupled)  2048K Flash (64K reserved for recovery & EEPROM emulation)  Lots of interfaces  6.6 X faster than ESP32 in one benchmark. (331 X faster than Arduino AVR Mega)  The Teensy board line appears to be the product of a one man operation run by Paul Stoffregen, he seems quite competent and is active on the support forum, his store is a little behind, it took some hinting to find the sales page for the Teensy 4.0.  It works with Arduino IDE his variation called TeesyDuino, using an installer t...

ongoing topic... Hand Gesture Input with Tactile Feedback There are circumstances and users that require unconventional input devices, some examples:   Leapmotion ,  the hand gesture input device maker and Ultrahaptics , the leading supplier of ultrasonic Haptic (tactile feedback) device have joined forces to form ultraleap.com a promotion site site for the combining of these 2 separate products to provide an enhanced user experience.    The Ultrasonic emitter array used in Haptic interfaces is similar to the Sound Flashlight recently demonstrated.  Some demonstrations allow a user to "feel" simple geometric shapes.    Leapmotion uses Stereo cameras and IR lights to identify hand gestures, it's a processing intensive and limited approach compared to scattered laser emitter 3D imaging using in Kinnect games and iPhone Face recognition, I lost some enthusiasm about Leapmotion when they retooled their software for use with VR headsets inste...

LEDs being current, rather than voltage operated devices require special driver circuits for optimal performance.  While simple applications like an indicator light that might be run at a fraction of it's rated capability, a series current limiting resistor is sufficient.  High power application running at the edge of the LED's max current rating require active regulation to compensate for the negative temperature coefficients of the LED, (measurement techniques are discussed in this university lab paper .) Low power LEDs can be driven with simple series resistor current control when powered from a regulated power supply. The LED Load Line graph be low helps one select a standard resistor value to get the ballpark current setting with a 5 volt power source.  Find where your LED's color line intersects the desired current, then pick the closest resistance line below that intersection. (This graph is from LEDnique.com , a collection of basic articles on LEDs aime...