Perfecting the Pulse Oximeter

Showing pulse oximeter and color sensor combining to measure oxygen in blood and skin tone

We’re always looking for interesting biohacks here on Hackaday, and this new research article describing a calibrated pulse oximeter for different skin tones really caught our attention. Pulse oximeters are …read more Continue reading Perfecting the Pulse Oximeter

An Oscilloscope Trigger For Vintage Video Processors

A small green circuit board with a tiny OLED display

Working on retro computers is rarely straightforward, as [ukmaker] recently found out while designing a new display interface. Their oscilloscope was having trouble triggering on the video signal produced by …read more Continue reading An Oscilloscope Trigger For Vintage Video Processors

TI and Cadence Make PSpice Free

We like simulation software. Texas Instruments long offered TINA, but recently they’ve joined with Cadence to make OrCAD PSpice available for free with some restrictions. You’ve probably heard of PSpice — it’s widely used in academia and industry, but is usually quite costly. You can see a promotional overview video …read more

Continue reading TI and Cadence Make PSpice Free