Wearable Design Project - Part II: Sensing

Piet Callemeyn is back at it with his wireless heart rate sensor, diving right into the sensors themselves. Follow along to explore precision sensing techniques, integrated optics, size considerations, power consumption optimization, and the role of embedded processing in your design. Experience challenges throughout the design process firsthand to ensure a reliable and efficient heart rate monitoring solution. Later on, we'll shift our focus to sensor selection and operational efficiency where you will learn how sensors intelligently manage power consumption, especially during idle periods when not actively engaged in data collection.
This video is a must-watch for wearable technology enthusiasts, electronics engineers, health tech innovators, and anyone interested in the convergence of innovation and functionality.
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Altium LLC (ASX:ALU), a global software company based in San Diego, California, is accelerating the pace of innovation through electronics. From individual inventors to multinational corporations, more PCB designers and engineers choose Altium software to design and realize electronics-based products.
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[@JoseGuzman-ny2ul]

Part III?

[@nidhinbenny7975]

Hi guys, nice video. Would you guys be interested in making a video showing how to functionally test high speed interfaces (like USB, ethernet, RF - 2.4 GHz) with a real-life design? I mean testing in regard to signal integrity (reflections) etc. Would be super informative to see the basics of how these systems are tested and fixed in real life prototyping by the pros. I'm a hobbyist designing some stuff with high-speed interfaces like that and have come across a few things that I would like to see some good tutorials on: 1. What measurement equipment you need (oscilloscope bandwidth/probe capacitance requirements etc). 2. Where to probe the signal to minimally affect it and see what's actually going on. 3. How to tune the termination networks (for high speed digital) and matching networks (for RF) during testing - how close is close enough etc. 4. As a related topic, I would also like to see testing of PDNs (especially where and how to test the VDDIO/VDDA pins for ICs and how to chose components of correct ESR requirements etc). If you guys ever do a real-life demo of this, that would be amazing! Really appreciate the effort that Altium and its employees are putting into educating the engineering community. Thank you!

[@ryanmadden9276]

Hey Piet, thanks for the walkthrough of the design process. I'd like to know about a particular part of your schematic you showed off. I noticed you didn't place any decoupling caps for the BGA load switches. The datasheet recommends 0.1uF-1uF on Vout and 1uF on Vin. Is this done as a space-saving measure? I imagine the main concern here would be other devices being affected by a disruption on the supply rail shared with the load switch, especially in an event with a sudden load transient, such as toggling the switch (power gating the device). It would be interesting to understand the rationale. Looking forward to the rest of the series!

[@oli32xx]

I was wondering this too. Let me know is you figure it out.

[@taile4769]

I guess this was not a complete schematic and he'll have more details on power supply design in the next videos.

[@ajays886]

I was doing the same project for animals

[@steevenmaldonado5839]

I think is because they recomend 0.1uF this but is enough with 1uF