G Chang

Bird nesting box camera, semiconductor physics, solar astronomy, electronics, camera obscura, hand sanitizer formula, Raspberry Pi, Brother laser printer cartridges, Toyota windshield wiper DIY, bike cargo box

Chestnut-backed chickadees fledge over 5 minutes May 9, 2025 SF Bay Area
Chestnut-backed chickadees fledge over 5 minutes May 9, 2025 SF Bay Area
Chestnut-backed chickadees 3 days old, feeding & poop removal
Chestnut-backed chickadees 3 days old, feeding & poop removal
Dad, mom chestnut-backed chickadees feed babies April 2025
Dad, mom chestnut-backed chickadees feed babies April 2025
Chickadees hatching early morning April 18, 2025 live cam youtube.com/@graychang99/live
Chickadees hatching early morning April 18, 2025 live cam youtube.com/@graychang99/live
Vicious fight: two chestnut-backed chickadees in nesting box (viewer discretion advised) 2025
Vicious fight: two chestnut-backed chickadees in nesting box (viewer discretion advised) 2025
P-N junction, electron/hole flow, exponential diode equation, valve, photovoltaic solar cell, LED
P-N junction, electron/hole flow, exponential diode equation, valve, photovoltaic solar cell, LED
P-N junction, injected carrier profile, diffusion length L, electron/hole currents vs X, Kirchhoff
P-N junction, injected carrier profile, diffusion length L, electron/hole currents vs X, Kirchhoff
P-N junction forward bias, Boltzmann, majority & minority injected carrier concentration profiles
P-N junction forward bias, Boltzmann, majority & minority injected carrier concentration profiles
P-N junction, depletion region, electric field barrier, built-in potential, reverse bias
P-N junction, depletion region, electric field barrier, built-in potential, reverse bias
Semiconductor P-N junction, electron/hole diffusion & drift, non-uniform doping profile
Semiconductor P-N junction, electron/hole diffusion & drift, non-uniform doping profile
Semiconductor doping, donor/acceptor electron/hole, mass action, pH analogy: acid/base H+/OH-
Semiconductor doping, donor/acceptor electron/hole, mass action, pH analogy: acid/base H+/OH-
Electrons and holes in semiconductors: intrinsic/extrinsic silicon, donors & acceptors, mass action
Electrons and holes in semiconductors: intrinsic/extrinsic silicon, donors & acceptors, mass action
Silicon & diamond unit cell atomic model, wafer/crystal orientation, Miller indices (100) (111)
Silicon & diamond unit cell atomic model, wafer/crystal orientation, Miller indices (100) (111)
Reebok Classic Leather Unisex Running Shoe review (black GY0955) compared to old Club C
Reebok Classic Leather Unisex Running Shoe review (black GY0955) compared to old Club C
Chickadee nest-building to fledging time lapse
Chickadee nest-building to fledging time lapse
Birdhouse with ceiling webcam and natural-lighting windows
Birdhouse with ceiling webcam and natural-lighting windows
3-eyed bird (extra eye on side), chestnut-backed chickadee in nest box
3-eyed bird (extra eye on side), chestnut-backed chickadee in nest box
Rare Oriental Turtle Dove in Palo Alto, California: February-March 2022
Rare Oriental Turtle Dove in Palo Alto, California: February-March 2022
Oak Titmouse in Bird Nesting Box Stereo 3-D View
Oak Titmouse in Bird Nesting Box Stereo 3-D View
3-D Stereo Cross-Eyed Image Viewing Methods Without Glasses
3-D Stereo Cross-Eyed Image Viewing Methods Without Glasses
Egg-to-fledge time lapse, chestnut-backed chickadee feeding & waste removal
Egg-to-fledge time lapse, chestnut-backed chickadee feeding & waste removal
Chickadee mimics snake hiss and movement to scare off feared predator
Chickadee mimics snake hiss and movement to scare off feared predator
Chickadee mom helps overstuffed baby share food with siblings & removes diaper
Chickadee mom helps overstuffed baby share food with siblings & removes diaper
Chickadee feeds baby and discards diaper (fecal sac)
Chickadee feeds baby and discards diaper (fecal sac)
Mom & dad chestnut-backed chickadees feed babies and eat fecal sacs
Mom & dad chestnut-backed chickadees feed babies and eat fecal sacs
Mom & dad chickadees feed newly hatched babies and remove eggshells
Mom & dad chickadees feed newly hatched babies and remove eggshells
Chickadee fights snake intruder in nesting box -- frightening
Chickadee fights snake intruder in nesting box -- frightening
Chickadee struggles to remove twig brought by wren into nesting box (0:50)
Chickadee struggles to remove twig brought by wren into nesting box (0:50)
9 days of nest-building in a minute: Chestnut-backed chickadee
9 days of nest-building in a minute: Chestnut-backed chickadee
Solar-Powered Dowsing for Buried Hoards of Gold & Silver Treasure (ha, ha)
Solar-Powered Dowsing for Buried Hoards of Gold & Silver Treasure (ha, ha)