February 2020 Hodgepodge


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 camouflage skin is fairly unique, snake trail detection is a possibility as well.
    Probably using a powerful 'gaming' laptop to process raw video from drone.
   
    Scientists survey the presense of Pythons with field DNA tests of waterways.
 
    (Cuban tree frogs are said to be a bigger problem for Florida ecosystems)










 

EL Wire control - on the cheap

 Opto-Triac direct driving EL Wire strand.:



Tried the Moc3023 opto isolated triac driver

600V load, 5000V isolation, 5mA LED trigger current,  approx 60mA continuous load

It failed to turn back off when drive was removed, determined the 1000 v/us DVDT spec
was too slow for the 2000 hz EL inverter output.

-- take 2 --

Original design fould to have too slow a dv/dt for the 1 khz, 100v EL drive power.
 Commutating off failed.

 A newer design by Vishay with a 10,000 dv/dt (vs 1000 for the older design) worked properly.
  The input can be triggered with as little as 2mA LED current.





   It used a faster SCR pair in place of a Triac and an added spike suppressing circuit.





Digikey prices for some ATtiny examples

  6 pin smd
ATTINY10-TSHR  $0.33   1k flash 32 ram

 8 pin  0.10" dip                                  SMD price samples
ATTINY13-20PU $1.26    1k flash 64 ram,  ATTINY13A-SSUR smd $0.57
ATTINY25-20PU $1.08    2k flash 128 ram, ATTINY25-20SSN smd $0.74
ATTINY45-20PU $1.11    4k flash 256 ram
ATTINY85-20PU $1.20    8k flash 512 ram, ATTINY85-20MUR smd $1.02


One board seller commented that cheap LED "Fairy Lights"
(strands of single color surface mount LEDs spot welded to wires)
killed their IR Wire product business.







  
 ELbow 6 channel EL Wire sequencer standalone using ATtiny 2313  (discontinued)








 Expensive LED & EL Wire costumes
        resembling those used by dance groups on TV ($180 - $2.660.0)













   1A direct drive Opto-Triac for relay applications - Vishay VO2223A













24 Channel Solid State Relay board


They also make the VO3526 with similar characteristics but in an odd 10 pin package









  
  
   Neon Rope Tube Silica Gel - various projection patterns
    
    2 x End caps & 6 x Fixed clips included
  





  

LED Matrix for lighting effects   

 

kessil.com Aquarium lights, dense LED array helps produce shimmering effect

 

 What makes the shimmer - video

 

  


   Heila - High-resolution automobile lighting system "Digital Light SSL | HD": Over 30,000 pixels increase safety and comfort on the road
    volume production in 2022.
  







 
     
   Osram plans 25,600 pixel headlamp LEDs for automotive in 2023
   
     
Mapping of their earlier 1024 element matrix



Metal & Carbon Fiber 3D Printers 

 
https://markforged.com


- Composite -
Onyx
Onyx FR
HSHT Fiberglass
Carbon Fiber
Fiberglass
Kevlar®

- Metals -
Inconel 625
H13 Tool Steel
D2 Tool Steel
A2 Tool Steel
17-4 PH Stainless Steel





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