Blood Pressure Monitor for Under $1
https://hackaday.com/2023/06/20/blood-pressure-monitor-for-under-1/

Medical equipment is not generally known for being inexpensive, with various imaging systems usually weighing in at over a million dollars, and even relatively simpler pieces of technology like digital …read more (https://hackaday.com/2023/06/20/blood-pressure-monitor-for-under-1/)

Repairing a $25,000 HP Workstation to Run Pac-Man
https://hackaday.com/2023/06/20/repairing-a-25000-hp-workstation-to-run-pac-man/

The microcomputer revolution of the 1970s and 1980s turned computers from expensive machines aimed at professionals into consumer products found in the average household. But there always remained a market …read more (https://hackaday.com/2023/06/20/repairing-a-25000-hp-workstation-to-run-pac-man/)

How To Land A Model Rocket Vertically
https://hackaday.com/2023/06/21/how-to-land-a-model-rocket-vertically/

Perhaps most readers will remember when they saw the first SpaceX demonstration of a rocket stage landing vertically on the pad under control. It’s something of a shock to be …read more (https://hackaday.com/2023/06/21/how-to-land-a-model-rocket-vertically/)

Fuel Cell Turns PET and Carbon Dioxide into Useful Chemicals
https://hackaday.com/2023/06/21/fuel-cell-turns-pet-and-carbon-dioxide-into-useful-chemicals/

The University of Cambridge has a novel fuel cell design that can grab CO2 from the atmosphere or industrial processes and, combined with waste PET plastic, provides syngas and glycolic …read more (https://hackaday.com/2023/06/21/fuel-cell-turns-pet-and-carbon-dioxide-into-useful-chemicals/)

In Praise of RPN (with Python or C)
https://hackaday.com/2023/06/21/in-praise-of-rpn-with-python-or-c/

HP calculators, slide rules, and Forth all have something in common: reverse polish notation or RPN. Admittedly, slide rules don’t really have RPN, but you work problems on them the …read more (https://hackaday.com/2023/06/21/in-praise-of-rpn-with-python-or-c/)

No Frills Autonomous Lawnmower Gets The Job Done
https://hackaday.com/2023/06/21/no-frills-autonomous-lawnmower-gets-the-job-done/

[Nathan] needed an autonomous mower to help on the farm, so he built his own without breaking the bank. It might not be the prettiest machine, but it’s been keeping …read more (https://hackaday.com/2023/06/21/no-frills-autonomous-lawnmower-gets-the-job-done/)

Congratulations to Our Op-Amp Challenge Winners!
https://hackaday.com/2023/06/21/congratulations-to-our-op-amp-challenge-winners/