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

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Bass amp redux

Carlsbro Colt 45K bass amp.
knoba - Bass Amp Redux

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Found on a rubbish skip
knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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Rats…
knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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Reverb unit.
knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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New speaker.
knoba - Bass Amp Redux

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Re-covered.
knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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knoba - Bass Amp Redux

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“House amp”!
knoba - Bass Amp Redux

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Arduino battery power supply

Simple power supply for stand-alone arduino.

Would have liked to make a battery enclosure that took 2 stacked batteries.
knoba - arduino battery power supply - 01

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Strip-board pcb.
knoba - arduino battery power supply - 02

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Male usb mini b connector raided from cable.
knoba - arduino battery power supply - 03

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knoba – arduino battery power supply – 2016.dxf (CAD file link below)
knoba - arduino battery power supply

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knoba – arduino battery power supply – 2016.dxf

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Crystal tester

Colpitts oscillator crystal tester
Colpitts oscillator crystal tester

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Solder side
Colpitts oscillator crystal tester

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