Workshop smoke alarm

Switched smoke alarm for workshop. LED off indicates smoke alarm is active.

knoba - workshop smoke alarm

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LED flashing on indicates smoke alarm is deactivated.

knoba - workshop smoke alarm

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It can get a bit smoky in my workshop!
knoba - lab tripod

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Wiring.

knoba - workshop smoke alarm

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knoba - workshop smoke alarm

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Schematic file below.

knoba - workshop smoke alarm

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Materials:
1 x Switch: 1A, spdt (single pole, double throw)
1 x Flashing blue LED: 10mm, 15mA, 3.2v
1 x 10mm LED holder/bezel
1 x Resistor: 470ohms, 1/4W
Wire: 7/0.2mm 
Small heatshrink tubing

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knoba – Workshop Smoke Alarm Schematic – 2018.fzz

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http://www.homemadetools.net

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Tool throat LED

CAD stick-on templates, polycarbonate sheet & LED module
knoba - tool throat LED

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Module detail, 240v ac in, 20w out
knoba - tool throat LED

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All 8 holes drilled, cut out centre with fret saw/coping saw
knoba - tool throat LED

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Machined with laminate trimmer (small router)
knoba - tool throat LED

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All cleaned up. Lens (top), body (left) & module (right).
knoba - tool throat LED

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Very slim profile, very bright.
knoba - tool throat LED

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knoba - tool throat LED

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What’s in the CAD file…
knoba - tool throat LED

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Materials:
1 x 75x50x10 mm (3"x2"x3/8") polycarbonate sheet
1 x 75x50x3 mm (3"x2"x1/8") polycarbonate sheet
4 x M3x20 mm (1/8"x3/4") pan head machine screws
2 x lengths 7/0.2mm insulted wire (to suit connection distance)
1 x length heat shrink (to suit connection distance)
1 x small cable tie

nb. plastic sheet was recycled from computer monitor diffusers

Note: 1Amp in line fuse on live side. Use dpdt if switched.

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knoba - tool throat LED

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knoba – Tool throat LED – 2018.dxf

Ebay – Smart IC Driver 20W LED COB 220V

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Coil winder stick

Made from mahogany, for loading with magnet wire, 500mm long
knoba - coil winder stick

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A 2a variac core in for rewinding
knoba - coil winder stick

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Materials:
1 x 524x25x6 mm (20 5/8"x1"x1/4") hardwood
note: use (feet, 1/2 yard) if imperial measurements preferred!

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Via punches

Machined punches for brass through hole rivets
knoba - via punches

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Copper tracks had lifted, component had disintegrated, good repair, will use again!
knoba - via punches

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Refined the punches with; a taper, size i.d. & thumb nook
knoba - via punches

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knoba - via punches

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Materials (per unit):
1 x 75x6 mm (3"x1/4") circular solid section stainless steel


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Thumb wheel jig

Jig & threaded blank
knoba - thumb wheel jig

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Freshly machined thumb wheel blank
knoba - thumb wheel jig

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knoba - thumb wheel jig

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Screw blank on underside of jig, locknut it, drill through one hole, use lock pin (silver coloured part), drill through other holes, deburr, fettle & smooth thumb wheel.
knoba - thumb wheel jig

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Nice!
knoba - thumb wheel jig

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knoba - thumb wheel jig

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What’s in the CAD file…
knoba - thumb wheel jig

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Materials:
1 x 60x60x16 mild steel plate
1 x M12x80mm bzp bolt
1 x M6x40mm 12.9ht Socket cap bolt
1 x m6 washer
1 x m6 nut

1 x 13mmx32mm o/d, m6 threaded, 6 series Aluminium blank

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knoba – thumb wheel jig – 2018.dxf

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Garden hose wheel

A reminder of a younger life
knoba - garden hose wheel

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knoba - garden hose wheel

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knoba - garden hose wheel

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Bobbin spool keepers

Threads on bobbins, threads on spools, all very messy.
knoba - bobbin spool keepers

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stick is cut & lacquered, hair band is cut & wire wrapped at top of stick, bead is glued on, loop is made with small crimp in end of hair band.
knoba - bobbin spool keepers

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Neat.
knoba - bobbin spool keepers

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knoba - bobbin spool keepers

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What’s in the CAD file…
knoba - bobbin spool keepers

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Materials (per unit):
1 x 100mm nail stick (hoofer)
1 x 12mm wooden bead
1 x elastic hair band
1 x 2mm i/d crimp (bead/electrical)
wrapping wire
pva glue
varnish/lacquer

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knoba – bobbin spool keeper – 2018.dxf

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