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Adding manual shutter speeds to Yashica Electro 35 series cameras using Ardiuno

How to build a simple Arduino shutter speed tester – by Ethan Moses

I’ve been stuck in my house filling orders for my Kickstarter campaign for theΒ CAMERADACTYL 4Γ—5 Field Camera, mostly just babysitting printers, changing filaments and adjusting extruders every few hours. This has left me with some rare time for tinkering. Recently I built a cheap, quick and dirty tool to calibrate a project that I was …

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Simple Infrared PWM on Arduino

Simple Infrared PWM on Arduino, Part 3 – Hex IR Signals

In Part 1 of this series, we demonstrated how to send signals using soft or Simple Infrared PWM on Arduino. In our Part 2 post we looked at sending RAW IR signals – specifically a RAW NEC signal and a longer RAW Mitsubishi Air Conditioner signal using soft PWM. We have since improved the PWM …

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Simple circuit lets you characterize JFETs

Simple circuit lets you characterize JFETs

When working with discrete JFETs, designers may need to accommodate a large variation in device parameters for a given transistor type. A square-law equation is usually used as an approximate model for the drain-current characteristic of the JFET: ID=Ξ²(VGSβˆ’VP)2, where ID is the drain current, VGS is the gate-to-source voltage, Ξ² is the transconductance parameter, …

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Simplify DC-DC Converter Characterization

Simplify DC-DC Converter Characterization

DC-DC converters are widely used components that convert DC power from one voltage to another, producing a regulated output voltage. These devices are used in many electronic products, including laptops, mobile phones, and instrumentation. Like any device, DC-DC converters need to be characterized by manufacturers and by engineers evaluating them for a design. Given the …

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SIMPL Revisited - Again, but this time it's personal

SIMPL Revisited – Again, but this time it’s personal

In May 2013, I learned about Ward Cunningham’s Txtzyme language – a very simple serial command interpreter which allowed basic control of microcontroller function using a serial interface. I wrote about it here: Txtzyme – A minimal interpretive language and thoughts on simple extensions Tytzyme was about as easy as a “language” could get, it …

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