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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Woodwork awl

Recycled from a well-worn & much favoured Stanley philips 201 screwdriver. Re-ground & oil stone honed with 4 sided point
knoba - woodwork awl

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Awesome as a point awl (marking accurate; screw / drill points with brad point bits, flat bits & forstners)
knoba - woodwork awl

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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 – 2018.dxf

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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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Spool winder unwinder

Takes many sized spools
knoba - spool winder unwinder

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knoba - spool winder unwinder

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knoba - spool winder unwinder

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Wire holder & hex key holder
knoba - spool winder unwinder

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Adjustable friction clutch
knoba - spool winder unwinder

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What’s in the CAD file…
knoba - spool winder unwinder

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Materials:
1 x 142x100x6 mm (5 5/8"x4"x1/4") plate/sheet mild steel
2 x 50x80x3 mm (2"x3 1/8"x1/8") plate/sheet mild steel
4 x m5x12 mm (3/16"x1/2") socket head bzp machine screws
4 x 12mm (1/2") o/d rubber stick on feet
2 x 25x30 mm (1"x1 1/4") nylon 6-6
3 x M6 (1/4") stainless steel penny washers
1 x M6 (1/4") felt, penny washer size
1 x M6 (1/4") conical spring
1 x M6 (1/4") thumb wheel
2 x M4 (3/16") grub screws
1 x M6 (1/4") circlip, or e-clip, or any other axial load shaft retainer
1 x 250x6 mm (10"x1/4") stainless steel bar
Some paint
& a handle (wood, metal, I used beads for jewellery)

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knoba – spool winder unwinder – 2018.dxf

knoba – thunb wheel jig

Rapid electronics – stick on rubber feet

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

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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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