29/03/17: I was able to measure the displacement amplitude on my ultrasonic horn
21/02/17: I've at last made a video on ultrasonic transducers - how to measure them and design suitable horns. Check down the bottom of the page.
20/06/16: Valved top for drinks bottle
01/06/16: Big update! Linear power-supply potentiometer feedback, LM317 adjustable current source/regulator, AxiDraw laser cutting/light painting/phosphorescent vinyl, and drawing the Lorenz attractor on the AxiDraw, also using light painting and glow in the dark vinyl.
30/05/16: Vacuum cleaner motor commutator cleaning
18/03/16: Review of Arachnid Labs' miniature M3 angle brackets
21/02/16: Asteroids font added to the big list of single-line fonts
27/12/15: Sliding bandsaw table
29/11/15: UV quartz sleeve - good source of large-diameter quartz tubing
25/09/15: Shredder adjustment screw repair
30/08/15: Some photos of the valve added to the page on the petrol to steam conversion
20/08/15: Macro photography stand
13/07/15: Freeze frame effect
09/07/15: Arbor press ram machining - sprucing up a cheap 1-ton arbor press
27/02/15: Celtic/Pictish circuit board coasters!
23/02/15: Bottoming tap modifications
14/02/15: Eccentric turning using two chucks
03/02/15: Summary of lots of single-line engraving fonts
09/01/15: Accurately measuring lathe topslide angle. I've put the RSS feed back again since, according to my logs, quite a few people were using it after all! I've also added CSS and XSL stylesheets to the RSS file, following the fantastic guide here, to make the feed display nicely in a browser.
02/01/15: Tube swaging drawbench
22/12/14: Gate drive transformer testing. I've ditched the RSS feed - you can use Twitter to keep up to date with what's new on the website.
07/10/14: Oscilloscope probe contact tips
28/09/14: Telescoping bore gauge
19/09/14: Some measurements of the efficiency of hard drive mirrors
16/09/14: Calculating the force exerted by a band clamp
06/09/14: Clamp-type shaft coupler
29/08/14: Repairing a threaded hole in aluminium
26/07/14: Planetary multiturn potentiometer
12/06/14: The end of the RED tour
09/06/14: USB connector panel insulator
01/06/14: Old TV tube neck assembly
18/05/14: Solvent spray fireball
27/04/14: Adjustable microscope eyepiece holder
11/04/14: Sidebar adverts have been removed since they had been killing the website visits. Apologies to anyone who was annoyed by them!
09/03/14: Flicker LED macro photos
06/03/14: Added an RSS feed. Updates will now go on both the news page and the RSS feed.
20/02/14: Laser-cut flexure translation stage
06/02/14: Inductor design (energy-storage types)
19/01/14: Magnetron sputtering gun plasma
15/01/14: Damping grease demonstration
15/12/13: RMS and average values of waveforms
12/12/13: High-current shunt resistor
09/12/13: Molybdenum disulfide laser marking
06/12/13: X-ray of IKEA "wood"
05/12/13: A better electric hotplate
26/11/13: PCB drilling video
22/11/13: IC decapping
19/11/13: Thin diamond saw
19/11/13: Laser wire stripping
17/11/13: LED ring light for mill
10/11/13: Pick-and-place CNC router conversion
01/09/13: Finding window handles
23/08/13: Bench punch leverage measurement
27/07/13: Lawnmower repair
19/07/13: Put a "latest updates" scrollbox on the front page. Modified the stylesheet slightly so that the header and navigation bar are now hidden when you print the page. Added thumbnails for the different page categories.
04/07/13: Webcam crosshairs using Processing
22/06/13: Garage tour
15/06/13: Salvaging ferrite transformer cores
14/05/13: Another example of a toner-transfer PCB
03/05/13: Thermal measurement of laser power
31/03/13: High-speed photodiode
10/03/13: Nails as tommy bars
10/02/13: Online calculators added
04/02/13: Test indicator contact bar tip
25/01/13: Sherline coolant tray
21/01/13: Vacuum hold downs
15/01/13: Rotary slit scanning
07/01/13: Powder coating
20/12/12: Video of Mandelbrot set zoom added to page on distance estimation methods
12/12/12: Links page
25/11/12: Distance estimation methods
20/11/12: Sharpening a tap
12/11/12: Load resistance on PIC programming pin
17/10/12: Electric field plotter software
02/10/12: Reason for dip in expansion curve added to solder glass page
30/09/12: CRT stem pin holder
23/09/12: Warning about grounding laser diode added to UV laser diode page.
21/09/12: Small variac transformers
19/09/12: More photos of an Edwards glass lathe
16/09/12: Using a webcam in VB6
09/09/12: Changed the appearance slightly (background, centered body, and rounded corners). PCB via size test.
23/08/12: Wire butt welder
10/08/12: Soft drink bottle top thread size
08/08/12: High-voltage diode stack
02/08/12: Bench punch
06/07/12: Added where to get needles for the micro gas torch.
05/07/12: Hot air gun circuit and operation
24/06/12: Punch and die set for washers
15/06/12: Mapping Num Lock key to a comma
05/04/12: Card creasing punch
30/03/12: Added video of laser engraving and cutting card
29/03/12: Example of laser-engraved anodised aluminium added to laser cutting pages
27/03/12: Better example added to the page on the double sided exposure alignment jig
23/03/12: Resistor colour code chart
08/03/12: Miniature rope knurling tool
01/03/12: Capacitive high voltage probe
11/02/12: 40-400V power supply
27/01/12: Shop added with my first product!
23/01/12: Sandblasting glass
18/01/12: Single-arm water manometer
12/12/11: Laser-cut happy Mac (bottom of page)
05/12/11: Faulty PCB pin header connectors
04/12/11: Bayonet bulb plug adapter
24/11/11: SOT23-6 adapter boards
18/11/11: TV CRT socket
16/11/11: The photos of my jamjar Panaplex display were used in the countdown clock at the Nerd New Year event in Redwood City, CA. For more info, see http://www.phantomgalleries.com/SJ/2011/11/carter_needs_your_numbers.html and http://nerdnewyear.com/.
05/11/11: Another example of using solder glass powder (see bottom of page)
27/10/11: ICSP adapter for EasyPIC5
18/10/11: How to do simple animations in Rhino 3D
24/09/11: Changed the logo to a new style
21/09/11: Uses for disposable syringes
20/09/11: Dismantling a freewheel cogset
11/08/11: Flexible shaft coupling
31/08/11: A few explanatory photos added to the lathe DRO page
26/08/11: Lathe quick change toolpost
27/07/11: Anodising aluminium
23/07/11: Lathe DRO
21/07/11: Updated the page on solder glass to include dilatometry results and a full explanation of what's happening.
18/06/11: Manual orbital TIG welding
16/05/11: Added a better video of cutting glass tubing in the lathe
15/05/11: Ribbon burner for the micro torch
12/05/11: HV trigger and capacitor dumper
11/05/11: Added some better photos of the glass lathe
13/04/11: Added example of joining a CRT stem using solder glass
05/04/11: Added stuff on cutting mica, engraved wooden boxes, and protecting wooden surfaces to the laser cutting examples page
27/03/11: Using solder glass
14/03/11: Pulse arc welding using TIG torch
10/03/11: Custom text discharge tube
09/03/11: Digital camera spectroscope
07/02/11: Page on vacuum filling manifold
25/01/11: Added page on digital Kirlian photography.
14/12/10: Finally uploaded the old pages on my homebuilt CO2 lasers
13/12/10: Changed the logo text from Century Gothic to Papyrus (download the Papyrus font here)
07/12/10: Page on a rotary valve steam engine
06/12/10: Page on converting a petrol engine to a steam engine
04/12/10: Added new page on an air inlet guide for the laser cutter
25/11/10: New page on the second Panaplex display!
23/11/10: Added a "favicon" to the site
16/11/10: Cutting glass tubing on the lathe
04/11/10: Degassing chamber
30/10/10: Page on LTD Stirling engine.
27/10/10: Page on copper tubing pinch-off tool.
18/10/10: Page on Houskeeper Seals.
07/10/10: Added page on Nixie counter.
06/10/10: New site (v7) constructed using lots of nice CSS. Added page on AA battery eliminator.