Notes concerning “Contrivances”

• Fan noise would be less annoying if intermittent 02021-01-03 (updated 02021-01-04) (1 minute)
• iPhone replacement cameras as 6-μs streak cameras 02021-01-22 (updated 02021-12-30) (2 minutes)
• Energy autonomous computing 02021-02-18 (updated 02021-12-30) (58 minutes)
• Panelization in PCB manufacturing 02021-02-25 (updated 02021-02-26) (7 minutes)
• Refreshing Flash memory periodically for archival 02021-03-02 (1 minute)
• Geneva wheel stopwork 02021-04-07 (updated 02021-04-08) (6 minutes)
• A bargain-basement Holter monitor with a BOM under US$2.50 02021-04-07 (updated 02021-07-27) (33 minutes)
• Locking telescope 02021-04-07 (updated 02021-12-30) (2 minutes)
• Logarithmic low-power SERDES 02021-04-08 (4 minutes)
• Forming steel with copper instead of vice versa 02021-04-16 (updated 02021-06-12) (2 minutes)
• Phased-array imaging sonar from a mesh network of self-localizing sensor nodes 02021-04-27 (updated 02021-12-30) (8 minutes)
• A boiler for submillisecond steam pulses 02021-04-28 (updated 02021-12-30) (10 minutes)
• Planetary roller screw worm drive 02021-05-07 (updated 02021-12-30) (4 minutes)
• Weighing an eyelash on an improvised Kibble balance 02021-05-08 (updated 02021-12-30) (3 minutes)
• A four-dimensional keyboard matrix made of linear voltage differential transformers (LVDTs) to get 30 or 180 keys on five pins 02021-05-12 (updated 02021-12-30) (4 minutes)
• Planetary screw potentiometer 02021-05-12 (updated 02021-12-30) (1 minute)
• Omnidirectional wheels 02021-05-30 (updated 02021-12-30) (1 minute)
• Broken hard disks are the cheapest source of ultraprecision components 02021-06-02 (updated 02021-06-12) (3 minutes)
• Micro impact driver 02021-06-02 (updated 02021-06-12) (2 minutes)
• Flux-gate downconversion in a loopstick antenna? 02021-06-15 (updated 02021-07-27) (2 minutes)
• Base 3 gage blocks 02021-06-27 (updated 02021-12-30) (5 minutes)
• Multiple counter-rotating milling cutters to eliminate side loading 02021-06-27 (updated 02021-12-30) (7 minutes)
• Sonic screwdriver resonance 02021-07-06 (updated 02021-12-30) (11 minutes)
• Subnanosecond thermochromic light modulation for real-time holography and displays 02021-07-06 (updated 02021-12-30) (8 minutes)
• Spreadtool 02021-07-10 (updated 02021-12-30) (30 minutes)
• The ayurvedic “fire mud” of Bhudeb Mookerji and modern castable refractories 02021-08-05 (updated 02021-08-15) (22 minutes)
• Arc maker 02021-08-07 (updated 02021-12-30) (11 minutes)
• Pocket kiln 02021-08-09 (updated 02021-08-15) (7 minutes)
• Recursive bearings 02021-08-23 (updated 02021-12-30) (1 minute)
• Sorption vacuum pumps really can’t operate continuously 02021-08-24 (updated 02021-09-11) (5 minutes)
• Better screw head designs? 02021-08-25 (updated 02021-09-11) (4 minutes)
• Weighing balance design 02021-09-06 (updated 02021-12-30) (9 minutes)
• Fast-slicing ECM 02021-09-08 (updated 02021-12-30) (3 minutes)
• Compliance spectroscopy 02021-09-29 (updated 02021-12-30) (4 minutes)
• Liquid dielectrics for hand-rolled self-healing capacitors 02021-09-30 (updated 02021-12-30) (3 minutes)
• Triggering a spark gap with low jitter using ultraviolet LEDs? 02021-10-20 (updated 02021-10-23) (8 minutes)
• Thread rolling roller screw 02021-11-04 (updated 02021-12-30) (1 minute)
• An aluminum pencil for marking iron? 02021-11-06 (updated 02021-12-30) (2 minutes)
• Wire brush microscope 02021-11-06 (updated 02021-12-30) (1 minute)
• Ivan Miranda’s snap-pin fasteners and similar snaps 02021-11-11 (updated 02021-12-30) (3 minutes)
• Aqueous scanning probe microscopy 02021-11-12 (updated 02021-12-30) (7 minutes)
• Some notes on reading parts of Reuleaux’s engineering handbook 02021-11-17 (updated 02021-12-30) (7 minutes)
• Vernier indicator 02021-11-22 (updated 02021-12-30) (6 minutes)
• Regenerative muffle kiln 02021-12-21 (updated 02021-12-30) (19 minutes)
• Toggling eccentrics for removing preload from spring clamps 02021-12-28 (updated 02021-12-31) (22 minutes)