alternatasha a site to catalog random projects

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arduino
temperature sensor
temperature sensor

It’s winter time, and I need to monitor temperature throughout my place.  I had an extra Maxim DS18B20 “One-Wire” digital temperature sensor.  This can easily be read by any arduino-type microprocessor board.  I decided to use the Seeeduino Stalker for the task.  WIth its numerous digital pins, it made sense for me to hook up […]

D-cell battery capacity testing
D-cell battery capacity testing

Introduction Single-use D-cells bought in foreign countries were tested to get a rough idea of battery capacity (in mAH) in order to compare the overall value in purchasing disposable batteries as opposed to rechargeable ones. As battery capacity is a function of the C-rate at which the current is drawn, one type of circuit for […]