http://imajeenyus.com Imajeenyus RSS feed - keep up to date with the latest developments! http://imajeenyus.com/computer/20150110_single_line_fonts/index.shtml#hp1345a Added a new entry for a very nice digitisation of the font used on the HP1345A vector-graphics display. Sat, 29 Apr 2017 14:41:00 GMT http://imajeenyus.com/electronics/20110514_power_ultrasonic_driver/index.shtml I was able to measure the peak-to-peak displacement of my ultrasonic horn - about 20 microns. Check out the page for more info. Wed, 29 Mar 2017 14:52:00 GMT http://imajeenyus.com/electronics/20110514_power_ultrasonic_driver/index.shtml I've at last made a video which covers how to measure ultrasonic transducers and design suitable horns for them! Tue, 21 Feb 2017 11:02:30 GMT http://imajeenyus.com/other/20161216_zodiac_tiles/index.shtml I've started making and selling a range of glazed ceramic tiles featuring the animal characters from the Chinese Zodiac. Fri, 16 Dec 2016 18:04:00 GMT http://imajeenyus.com/mechanical/20120922_drink_bottle_valve/index.shtml This screws on to a standard 2L drinks/soda/pop bottle using a PCO1810 thread and enables it to be used as a low-pressure air reservoir. Mon, 20 Jun 2016 23:00:00 GMT http://imajeenyus.com/computer/20160603_axidraw_cyanotype/index.shtml Using a 100mW 405nm UV laser on the AxiDraw to "draw" on Cyanotype paper Tue, 07 Jun 2016 17:17:00 GMT http://imajeenyus.com/computer/20160601_rhinoscript_lorenz/index.shtml A program in Rhinoscript to calculate the Lorenz attractor and output it as a path to Rhinoceros 3D. Includes demo of laser engraving the resulting path. Tue, 07 Jun 2016 16:52:00 GMT http://imajeenyus.com/computer/20160531_axidraw_lorenz/index.shtml A Python script to calculate and draw the Lorenz attractor in realtime on the AxiDraw. Examples of pen drawing, light painting, and glow in the dark vinyl exposure. Wed, 01 Jun 2016 16:27:00 GMT http://imajeenyus.com/computer/20160531_axidraw_laser/index.shtml How to get the AxiDraw to control a laser diode, with examples of laser cutting, light painting using long-exposure photography, and "drawing" on phosphorescent (glow in the dark) vinyl. Wed, 01 Jun 2016 16:26:00 GMT http://imajeenyus.com/electronics/20160530_adjustable_current_source/index.shtml A linearly-adjustable current source based on the LM317 regulator, useful for things like laser diodes Wed, 01 Jun 2016 16:25:00 GMT http://imajeenyus.com/electronics/20160517_potentiometer_feedback/index.shtml Ensuring a linear response and protection against loss of wiper contact Wed, 01 Jun 2016 16:24:00 GMT http://imajeenyus.com/workshop/20160529_hoover_commutator/index.shtml I skimmed a little bit off the commutator to give a fresh surface and reduce sparking Mon, 30 May 2016 12:48:00 GMT http://imajeenyus.com/electronics/20151028_smps_variable_voltage/index.shtml Converting a 12V fixed supply into an adjustable 5-15V supply Wed, 11 May 2016 21:51:00 GMT http://imajeenyus.com/mechanical/20160308_arachnid_labs_bracket/index.shtml A quick review of some neat little M3 angle brackets for laser-cut boxes, made by Arachnid Labs Fri, 18 Mar 2016 11:52:00 GMT http://imajeenyus.com/computer/20150110_single_line_fonts/index.shtml#asteroids New single-stroke font based on the Asteroids arcade game Sun, 21 Feb 2016 18:53:00 GMT http://imajeenyus.com/workshop/20151225_bandsaw_table/index.shtml Simple table for the bandsaw to do accurate straight and right-angle cuts Mon, 28 Dec 2015 01:34:00 GMT http://imajeenyus.com/mechanical/20151127_quartz_sleeve/index.shtml An interesting source for large-diameter quartz tubing Sun, 29 Nov 2015 18:19:00 GMT http://imajeenyus.com/workshop/20151015_razor_cutting_rubber/index.shtml I needed lots of small rubber spacers for a project. It's easy to cut them from rubber tubing using a razor blade as a tool. Mon, 02 Nov 2015 11:00:00 GMT http://imajeenyus.com/mechanical/20150909_shredder_repair/index.shtml Fixing the adjustment screw on a Flymo Pac a Shred - it had been pushed out of the diecast casing Fri, 25 Sep 2015 10:58:00 GMT http://imajeenyus.com/electronics/20150912_ssr_switched_socket/index.shtml I fitted a SSR relay inside a twin-gang mains socket to enable easy switching of loads using an external control signal Thu, 24 Sep 2015 17:43:00 GMT http://imajeenyus.com/workshop/20150924_d_reamer/index.shtml Grinding a D-bit reamer on the lathe using an abrasive cutoff disc mounted on a toolpost grinder Thu, 24 Sep 2015 17:32:00 GMT http://imajeenyus.com/workshop/20150923_sherline_grinding_arbor/index.shtml M14x2mm arbor to hold angle grinder discs on the Sherline spindle Thu, 24 Sep 2015 16:59:00 GMT http://imajeenyus.com/workshop/20150917_hot_foil/index.shtml Improving on a cheap manual hot foil machine by mounting the essential parts on an arbor press Thu, 24 Sep 2015 16:41:00 GMT http://imajeenyus.com/mechanical/20150720_knurled_thumbscrews_threaded_rod/index.shtml Thumbscrews using threaded rod and a rope knurl knob. Thu, 17 Sep 2015 11:18:00 GMT http://imajeenyus.com/optical/20150815_macro_photography_stand/index.shtml Stand for holding both the camera and an LED ring light for taking macro photos. Thu, 20 Aug 2015 00:42:00 GMT http://imajeenyus.com/workshop/20150731_hot_melt_strain_relief/index.shtml Applying hot-melt glue around a connector, then heatshrink on top. Heatshrink contracts, expels excess molten glue, and provies a good secure connection. Sat, 01 Aug 2015 22:05:00 GMT http://imajeenyus.com/workshop/20150507_powder_coating_starlocks/index.shtml A better example of the powder coating process - electrostatic coating and oven curing. Sat, 01 Aug 2015 10:55:00 GMT http://imajeenyus.com/other/20150710_freeze_frame/index.shtml An effect like One Direction's You & I video, where a moving character apears to merge into their frozen image and then move on Mon, 13 Jul 2015 12:40:00 GMT http://imajeenyus.com/workshop/20150707_arbor_press/index.shtml Sprucing up a cheap 1-ton arbor press. I bored out the end of the ram to accept existing tooling. Thu, 09 Jul 2015 11:42:00 GMT http://imajeenyus.com/electronics/20150625_current_fed_inverter/index.shtml An overview of current-fed inverters and why they're better (in my opinion) for resonant loads like induction heaters Mon, 06 Jul 2015 20:08:00 GMT http://www.imajeenyus.com/workshop/20150220_split_lathe_clamp/index.shtml Simple, strong clamp for holding cylindrical work accurately in the lathe Wed, 01 Apr 2015 11:06:00 GMT http://www.imajeenyus.com/mechanical/20140516_injection_mould_tensioner/index.shtml A not-very-successful attempt at moulding small plastic parts from glue-gun material Mon, 30 Mar 2015 22:45:00 GMT http://imajeenyus.com/electronics/20150227_pcb_coasters/index.shtml These coasters are made using standard PCB processes and feature a Celtic/Pictish key pattern design in gold-plated copper with black soldermask! Fri, 27 Feb 2015 21:09:00 GMT http://imajeenyus.com/workshop/20150220_bottoming_tap/index.shtml Grinding the end off a bottoming tap to allow threading right to the bottom of a hole Mon, 23 Feb 2015 12:05:00 GMT http://imajeenyus.com/workshop/20150203_eccentric_turning/index.shtml Using a 3-jaw chuck held in a 4-jaw chuck for eccentric turning Sat, 14 Feb 2015 11:12:00 GMT http://imajeenyus.com/computer/20150110_single_line_fonts/index.shtml Overview of lots of different single-line engraving fonts, with examples Tue, 03 Feb 2015 10:30:00 GMT http://imajeenyus.com/workshop/20141225_measuring_topslide_angle/index.shtml How to accurately measure or set the topslide angle on the lathe using a bit of trigonometry Fri, 09 Jan 2015 23:00:00 GMT http://imajeenyus.com/workshop/20141219_tube_drawbench/index.shtml Making a quick-and-dirty drawbench for enlarging some stainless tubing Fri, 02 Jan 2015 10:00:00 GMT http://imajeenyus.com/electronics/20141006_gdt_testing/index.shtml Construction and analysis of three toroidal gate drive transformers Mon, 22 Dec 2014 10:00:00 GMT http://imajeenyus.com/electronics/20140929_oscilloscope_probe_tips/index.shtml Making a low-inductance connection to a 'scope probe Tue, 07 Oct 2014 10:51:00 GMT http://imajeenyus.com/workshop/20140820_bore_gauge/index.shtml A simple bore gauge Sun, 28 Sep 2014 22:30:00 GMT http://imajeenyus.com/workshop/20140912_extending_tube/index.shtml Extending the laser cutter's lens tube by plugging and re-machining Thu, 25 Sep 2014 23:01:00 GMT http://imajeenyus.com/mechanical/20140912_height_setting_gauge/index.shtml An over-engineered adjustable gauge for setting the lens height Thu, 25 Sep 2014 23:00:00 GMT http://imajeenyus.com/optical/20140813_hdd_mirrors/index.shtml Using hard drive platters as mirrors for a CO2 laser cutter Thu, 18 Sep 2014 17:26:00 GMT http://imajeenyus.com/mechanical/20140815_knurled_thumbscrews/index.shtml Making knurled thumbscrews from standard socket-head hex cap screws Wed, 17 Sep 2014 19:31:00 GMT http://imajeenyus.com/mathematics/20140830_band_clamp_force/index.shtml How to calculate the total inward radial force exerted by a band clamp, e.g. a hose clamp Tue, 16 Sep 2014 18:22:00 GMT http://imajeenyus.com/mechanical/20140824_12mm_shaft_coupler/index.shtml Simple aluminium clamp-type coupler for 12mm shafts Sat, 06 Sep 2014 23:30:00 GMT http://imajeenyus.com/workshop/20140827_repairing_hole/index.shtml Correcting a poorly drilled hole in an aluminium part by plugging and re-drilling Fri, 29 Aug 2014 11:28:00 GMT http://imajeenyus.com/electronics/20140630_planetary_potentiometer/index.shtml Unusual multiturn potentiometer with a planetary gearing drive Sat, 26 Jul 2014 23:00:00 GMT http://imajeenyus.com/other/20140509_taylor_swift_giver_frames_2/index.shtml Frames from the second movie trailer Wed, 25 Jun 2014 13:05:00 GMT http://imajeenyus.com/workshop/20140603_6mm_broach/index.shtml A single-tooth broach cutter for producing an accurate hole in plastic Wed, 25 Jun 2014 12:05:00 GMT http://imajeenyus.com/other/20140612_red_tour_end/index.shtml My attempt at an image to mark the end of the RED tour Thu, 12 Jun 2014 21:28:00 GMT http://imajeenyus.com/electronics/20130613_usb_insulator/index.shtml A little plastic part which provides electrical insulation and mechanical support for a USB connectork Mon, 09 Jun 2014 17:33:00 GMT http://imajeenyus.com/workshop/20140520_mini_tube_drill/index.shtml Making a small tube drill to remove some old screws in a guitar headstock Sat, 07 Jun 2014 12:25:00 GMT http://imajeenyus.com/electronics/20140527_old_tv_neck/index.shtml Dissasembly of an old TV tube neck with the deflection coils and electron gun Sun, 01 Jun 2014 15:14:00 GMT http://imajeenyus.com/workshop/20140522_sherline_chuck_arbor/index.shtml Mounting a Sherline chuck on my big lathe Thu, 29 May 2014 02:02:00 GMT http://imajeenyus.com/mechanical/20140228_digigrams_puzzle/index.shtml A neat packing puzzle using the digits 0-9, designed by Martin Watson Wed, 28 May 2014 20:55:00 GMT http://imajeenyus.com/other/20140325_solvent_fireball/index.shtml Slow-motion video of a fireball from a solvent spray Sun, 18 May 2014 22:25:00 GMT http://imajeenyus.com/optical/20140428_air_gap_flash/index.shtml Using a slotted optical sensor to detect the pellet and then trigger a spark gap Wed, 30 Apr 2014 16:07:00 GMT http://imajeenyus.com/mechanical/20131218_microscope_eyepiece/index.shtml Adjustable microscope eyepiece Sun, 27 Apr 2014 17:20:00 GMT http://imajeenyus.com/other/20140320_taylor_swift_giver_frames/index.shtml Full-resolution frame grabs from the trailer Thu, 20 Mar 2014 21:40:00 GMT http://imajeenyus.com/other/20140311_taylor_swift_dollar_bill/index.shtml A bit of Photoshop fun, making a $13 bill with TS's face on it Thu, 20 Mar 2014 18:32:00 GMT http://imajeenyus.com/electronics/20140109_digimatic_interface/index.shtml A remote readout for my digital test indicator Thu, 20 Mar 2014 17:20:00 GMT http://imajeenyus.com/workshop/20131218_ikea_led_lamp/index.shtml Turning an IKEA LED lamp into a microscope lamp. Shows the insides of the lamp, plus some cool X-ray photos of the power supply. Mon, 17 Mar 2014 23:00:00 GMT http://imajeenyus.com/optical/20131230_flicker_led/index.shtml Some closeup shots and video of a flicker effect LED Sun, 09 Mar 2014 21:55:00 GMT http://imajeenyus.com/news.shtml I've added an RSS feed Thu, 06 Mar 2014 22:12:00 GMT http://imajeenyus.com/mechanical/20140219_laser_cut_flexure/index.shtml Making a simple translation stage using laser cutting Thu, 06 Mar 2014 22:00:00 GMT