Inverted tooling on the Boxford TCL160

Inverted tooling on the Boxford TCL160

A quirk of small Boxford CNC lathes is that, contrary to what appears to be most other CNC turning machines, they use their back-side tooling the "right" way up - with their insert facing away from the bed. This gives the advantage of allowing the user to see the tool edge clearly but also has the critical disadvantage that it requires left-hand oriented tools.

Typically this isn't an issue. Normal turning tools are available readily in left and right handed versions, but when it comes to specialist tooling (like those used for threading) things can start to get very expensive, very quickly.

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Fixing an unfocusable Minolta Hi-Matic

Fixing an unfocusable Minolta Hi-Matic

I have an old Minolta Hi-Matic F 35mm film camera – I love it dearly, despite its desire for unconventional batteries – and one day it suddenly stopped focusing properly. It was impossible to make the projected amber circle of the viewfinder align with the viewfinder image, and the lens seemed a bit ‘looser’ than normal.

Thankfully this was a simple fix that simply required the tightening of a few screws lens assembly. The roundabout way I discovered this isn’t particularly interesting, so instead I will show you what the problem was and how it was solved so you can get back to shooting sooner rather than later.

You will need a small flat head screw driver, and a small philips screwdriver. You won’t need to remove the top or bottom shells of the case, but if you are looking for that, hang around for a while and I’ll show you how.

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Sunbright Alarm Clock - Design

Sunbright Alarm Clock - Design

The idea is simple: a set amount of time before your alarm is due to go off the lights in the room are gradually raised to simulate dawn, thus leading to a more gentle awakening than the typical blaring alarm clock buzzer. In an ideal situation you would wake up just before your scheduled alarm time.

I saw this project on Hackaday which prompted action!

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ADC and PWM basics on the ATtiny13

ADC and PWM basics on the ATtiny13

I want to use an ATtiny13 to control the brightness of an LED light source (as a controller for this) and therefore need to control both the ADC input and the PWM output. This example is very simple, but will hopefully serve as a jumping off point for people new to the ADC and PWM systems in AVR microcontrollers.

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Upgrading a microscope to LED illumination

Upgrading a microscope to LED illumination

I recently managed to save a big, heavy binocular microscope from being rather unceremoniously turned into scrap metal. After spending a fair while looking at anything we could put our hands on underneath its' lenses I turned to changing the dim yellow tungsten light bulb to something with a bit more oomph - a high brightness LED.

The eventual aim is to attach a camera to it, so more light is always better.

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