#analog
// 36 posts tagged
Jul 4 5:32 PM #184 4 min To Watch the Sun, I Listened to a Submarine
VLF Sudden Ionospheric Disturbance MonitoringYesterday's spectroheliograph caught the Sun for one two-minute moment. So I built a receiver that watches a submarine transmitter instead — and never blinks, even when I'm asleep.
Jul 3 7:30 PM #183 3 min Eighteen Hundred Spectra and Not One Photograph of the Sun
SpectroheliographyA good session leaves me with 1,800 spectra and zero photographs of the Sun. The photo is something you compute afterward — one curved pixel-column at a time, dust stripe included.
Jun 27 7:47 PM #176 5 min One Pass Only or the Break Wanders
Stained GlassOne pass with the cutter or the break wanders. Copper foil, lead solder, flux fumes. Three rectangles that serve no purpose except filtering light.
Jun 25 7:49 PM #174 5 min Two Yellow Lines Three Metres Apart
Prism SpectroscopyTwo yellow lines where I expected one blob. Quantum mechanics visible with a razor blade and estate-sale prism—if you remember to keep the blade straight.
Jun 23 6:27 PM #172 5 min Seventy to One Hundred Then Three Days for the Medium
Microscope Slide PreparationThe lichen sections have been pickling in ethanol since March. Today I walked them through five solvents and they'll be ready Thursday.
Jun 18 10:55 AM #167 3 min Thirty-Three Kilograms Before the Motherboard Goes Under
Mineral Oil PC SubmersionWent for calcium supplement, left with an acrylic tank to drown a motherboard in. Thermal stratification turns out to be harder than the hardware.
Jun 8 8:49 PM #159 1 min Eight LEDs to Replace the Word Purple
LED Absorption SpectroscopyBuilt a spectrophotometer because calling mushroom dye 'purple' isn't specific enough. Eight discrete LEDs, one photodiode, and the end of subjective colour.
Apr 24 5:31 PM #111 4 min The Second Pull Kept What the First One Forgot
Gel Plate MonoprintingEleven prints went to recycling. The three I keep looking at are the accidents I almost didn't bother taking.
Apr 22 3:16 AM #109 4 min Three Blanks Shattered and the Drivers Still Waiting
Wooden Headphone Enclosure TurningThe chamber volume was mathematically perfect. The walnut exploded anyway.
Apr 21 8:36 PM #107 4 min The Air Remembers Every Roughness in the Wood
Acoustic Phonograph Horn CarvingMole crickets build exponential horns to amplify their songs. I'm doing the same, but for Caruso.
Apr 18 5:38 PM #103 2 min Fifteen Seconds Before the Foam Forgets Itself
Latte ArtRebuilding the espresso machine was easier than making milk look like a leaf on purpose.
Apr 18 2:38 AM #104 3 min The Motor Hummed Till Dawn and the Film Took Dictation
Pinhole Streak Camera BuildingThe math says width equals constant over velocity. My stationary coffee mug begs to differ.
Apr 17 5:14 PM #102 4 min Seven Days of Pressure Before the Paper Remembered Cliffs
Barograph Chart ArtA barograph is basically a barometer that learned how to draw. Mine spent the week sketching April as a mountain range.
Apr 9 7:32 PM #97 4 min Fifteen Seconds Before the Wax Stops Listening
Wax Seal MakingTwenty minutes examining the seal under a loupe before I remembered to open the envelope. The wax won.
Apr 7 5:19 PM #72 day 2 2 min Three Weeks of Staring Before the Green Arrived
BonsaiNew growth and yellowing needles on the same tree. The forums say this is fine. The forums also say it's dying.
Apr 6 8:18 PM #95 2 min Forty-Three Years of Oxide Before I Dare Press Play
Reel-to-Reel Tape RestorationThe machine came with a tape marked "DAD'S BIRTHDAY 1983." The heads are magnetized. No pressure.
Apr 2 7:41 PM #91 3 min Four Dark Sockets and Three Weeks to Wait
Nixie Tube Clock BuildingTwo tubes glow, one turned purple, and the "3" displays as a backwards "C." That's not a clock.
Apr 1 8:36 PM #90 4 min Twenty-Five Turns for Every One the Speaker Needs
Vacuum Tube Audio Amplifier BuildingA 5-watt Class A amp draws 30 watts from the wall. The other 25 become heat. Audiophiles call this warm.
Mar 28 6:09 PM #86 4 min Three Coats Before the Cloak Caught Light
Miniature PaintingI was researching ant farm decoration. Three hours later I'd ordered soldiers for a game I don't play.
Mar 26 8:09 PM #84 4 min The Slippers Were Faster Than I Expected
MicroscopySomething was moving in the ammonia test water. Squinting didn't help.
Mar 22 10:45 AM #80 4 min The Furnace Registers at 3.2 Hertz
Geophone SeismographyThe amplifier works perfectly. I can now confirm my furnace oscillates at 3.2 Hz. Earthquakes remain elusive.
Mar 20 5:31 PM #78 4 min The Hot Spot I Found and Then Immediately Lost
Crystal Radio RestorationForty-five minutes of dragging wire across a rock. Then a mattress ad. Then I breathed wrong and lost the signal.
Mar 18 6:12 PM #76 3 min The Sun Painted What I Left in the Dark
Cyanotype PrintingHalf the formula was already in my darkroom. The other half is FDA-approved for treating radiation poisoning.
Mar 17 6:30 PM #75 4 min Thirty Years of Transmitting Before I Learned to Listen
Shortwave ListeningChasing radar interference at midnight, I found a Romanian pan flute instead. Thirty years of ham radio before I remembered to stop pressing transmit.
Mar 16 8:23 PM #74 4 min Five Signatures for Five Hundred Years of Circuits
Coptic Stitch Flight Logbook BindingMy Jeppesen spine cracked again. Transport Canada doesn't mandate logbook format. Coptic monks solved this 1,800 years ago.
Mar 14 4:11 AM #72 3 min Three Hours and Now I Own Copper Wire
BonsaiThree hours ago I was reading about tree rings. Now I own copper wire.
Mar 12 5:44 PM #71 2 min What Silver Halide Remembers in the Dark
Analog Film Photography DevelopmentThe movies lied—there's no moody red safelight. Just total darkness and forty-three-year-old negatives ready to confess.
Mar 11 2:00 AM #70 4 min Three Significant Figures and the Rest Was Memory
Slide Rule CollectingIt's 2 AM and I'm teaching myself to multiply. The year, somehow, is 2026.
Mar 7 5:34 PM #68 3 min Two Mirrors and an S That Landed Right
Linocut PrintmakingThe S is backwards. No—wait. The S is correct. My brain keeps tripping over the double negative.
Mar 6 8:35 PM #66 1 min One Streak of Char and a Letter to Tomorrow
PyrographyTwenty years of soldering, and the iron finally found a better job: writing in smoke.
Mar 4 6:15 PM #61 4 min The Fifth Pull Finally Looked Like Weather
Paper Marbling (Ebru)A sample sheet of marbled paper arrived with my bookbinding thread. Forty-eight hours later I'm buying ox gall.
Feb 26 6:54 PM #53 2 min The Air Between My Fingers Wouldn't Sing
Theremin Circuit VoicingTwo oscillators fighting, my hand as a capacitor plate, and my nervous system as the noise floor.
Feb 21 5:00 PM #48 4 min The Wind Found Its Way to the Cathode
Nixie Tube Flight Instrument ClocksThe Soviet "5" is just an upside-down "2". I'm trusting it to show me the altimeter setting anyway.
Feb 20 5:16 PM #47 4 min Fourteen Pins, One Crooked, and a Hymn Stuck in Brass
Cylinder Music Box Transcription PunchingFourteen pins. That's all I punched before I ruined the cylinder.
Feb 13 5:22 PM #41 4 min The Beam Traced a Face the Speakers Couldn't Stand
Oscilloscope Art PortraitureThe face on the phosphor looks almost friendly. The audio required to draw it sounds like a dentist's drill arguing with a dial-up modem.
Jan 13 7:45 PM #12 3 min The Signal Sends a Fork and I Answer
Morse Chess Tactics BeaconKeyed a knight fork into the ether. Decoded it by ear. Solved it wrong. At least the transmission was clean.