<a href="https://macrofab.com/blog/mep-ep242-the-heartbeat-of-cats-and-leds">MEP EP#242: The Heartbeat of Cats and LEDs</a> Parker
<ul>
	<li>Battery charger and maintainer died

<ul>
	<li>Took all my batteries with it</li>
	<li>Company is replacing the unit</li>
	<li>Nothing looks particularly wrong with the PCB Assembly besides it being gross</li>
	<li>SF1565SG

<ul>
	<li>Current Mode PWM Controller</li>
</ul>
</li>
	<li>FQPF12N60C

<ul>
	<li>Fet used in the PWM Controller</li>
</ul>
</li>
	<li>HT46R004 HolTek MCU

<ul>
	<li>Cost Effective? </li>
</ul>
</li>
</ul>
</li>
	<li>Cat Feeder Unreminder

<ul>
	<li>Ordered a <a href="https://www.tindie.com/products/jaspersikken/solar-harvesting-into-supercapacitors/" rel="noopener">breakout board</a> for the AEM10941</li>
	<li>Super Caps SCCS30B106PRB

<ul>
	<li>10F @ 2.7VDC </li>
</ul>
</li>
	<li>Solar Panel AM-1816CA

<ul>
	<li>84µA at peak power</li>
	<li>This is specced at 200lx</li>
</ul>
</li>
	<li>Will this be enough?

<ul>
	<li>LTC2956 draws 0.8μA</li>
	<li>LEDs at 40μA a piece</li>
	<li>Total draw when Cat Feed Indicator is on is 40.8μA</li>
	<li>5F x (4.5V-3.6V) / 0.0000608 = 74,013 seconds -> 20 and a half hours!</li>
</ul>
</li>
</ul>
</li>
</ul>
Stephen
<ul>
	<li>Magnetics

<ul>
	<li>Transformers arrived!</li>
	<li>Be specific with what you ask for and ask questions. I almost got bit with dimensional issues</li>
</ul>
</li>
	<li>Diy Tag connect

<ul>
	<li>Made a pogo pin test connector</li>
	<li>Mill-Max 0955-0-15-20-71-14-11-0 Pogo pins with solder cup on back </li>
	<li>Using FR4 as mechanical supports</li>
	<li>Designing a Pawl system to clasp the pcb</li>
	<li>Next Revision

<ul>
	<li>Make the landing pads bigger</li>
	<li>Add something for strain relief</li>
	<li>Move the pins slightly down for more spring</li>
	<li>Add more anti rotation pins</li>
</ul>
</li>
</ul>
</li>
</ul>

MEP EP#242: The Heartbeat of Cats and LEDs Parker Battery charger and maintainer died Took all my batteries with it Company is replacing the unit Nothing looks particularly wrong with the PCB Assembly besides it being gross SF1565SG Current Mode PWM Controller FQPF12N60C Fet used in the PWM Controller HT46R004 HolTek MCU Cost Effective? Cat Feeder Unreminder Ordered a breakout board for the AEM10941 Super Caps SCCS30B106PRB 10F @ 2.7VDC Solar Panel AM-1816CA 84µA at peak power This is specced at 200lx Will this be enough? LTC2956 draws 0.8μA LEDs at 40μA a piece Total draw when Cat Feed Indicator is on is 40.8μA 5F x (4.5V-3.6V) / 0.0000608 = 74,013 seconds -> 20 and a half hours! Stephen Magnetics Transformers arrived! Be specific with what you ask for and ask questions. I almost got bit with dimensional issues Diy Tag connect Made a pogo pin test connector Mill-Max 0955-0-15-20-71-14-11-0 Pogo pins with solder cup on back Using FR4 as mechanical supports Designing a Pawl system to clasp the pcb Next Revision Make the landing pads bigger Add something for strain relief Move the pins slightly down for more spring Add more anti rotation pins

<a href="https://macrofab.com/blog/mep-ep242-the-heartbeat-of-cats-and-leds" rel="noopener noreferrer">MEP EP#242: The Heartbeat of Cats and LEDs</a> Parker
<ul>
	<li>Battery charger and maintainer died

<ul>
	<li>Took all my batteries with it</li>
	<li>Company is replacing the unit</li>
	<li>Nothing looks particularly wrong with the PCB Assembly besides it being gross</li>
	<li>SF1565SG

<ul>
	<li>Current Mode PWM Controller</li>
</ul>
</li>
	<li>FQPF12N60C

<ul>
	<li>Fet used in the PWM Controller</li>
</ul>
</li>
	<li>HT46R004 HolTek MCU

<ul>
	<li>Cost Effective? </li>
</ul>
</li>
</ul>
</li>
	<li>Cat Feeder Unreminder

<ul>
	<li>Ordered a <a href="https://www.tindie.com/products/jaspersikken/solar-harvesting-into-supercapacitors/" rel="noopener noreferrer">breakout board</a> for the AEM10941</li>
	<li>Super Caps SCCS30B106PRB

<ul>
	<li>10F @ 2.7VDC </li>
</ul>
</li>
	<li>Solar Panel AM-1816CA

<ul>
	<li>84µA at peak power</li>
	<li>This is specced at 200lx</li>
</ul>
</li>
	<li>Will this be enough?

<ul>
	<li>LTC2956 draws 0.8μA</li>
	<li>LEDs at 40μA a piece</li>
	<li>Total draw when Cat Feed Indicator is on is 40.8μA</li>
	<li>5F x (4.5V-3.6V) / 0.0000608 = 74,013 seconds -&gt; 20 and a half hours!</li>
</ul>
</li>
</ul>
</li>
</ul>
Stephen
<ul>
	<li>Magnetics

<ul>
	<li>Transformers arrived!</li>
	<li>Be specific with what you ask for and ask questions. I almost got bit with dimensional issues</li>
</ul>
</li>
	<li>Diy Tag connect

<ul>
	<li>Made a pogo pin test connector</li>
	<li>Mill-Max 0955-0-15-20-71-14-11-0 Pogo pins with solder cup on back </li>
	<li>Using FR4 as mechanical supports</li>
	<li>Designing a Pawl system to clasp the pcb</li>
	<li>Next Revision

<ul>
	<li>Make the landing pads bigger</li>
	<li>Add something for strain relief</li>
	<li>Move the pins slightly down for more spring</li>
	<li>Add more anti rotation pins</li>
</ul>
</li>
</ul>
</li>
</ul>

MEP EP#242: The Heartbeat of Cats and LEDs

Dive into the electrifying world of electrical engineering with Circuit Break, a MacroFab podcast hosted by Parker Dillmann and Stephen Kraig. This dynamic duo, armed with practical experience and a palpable passion for tech, explores the latest innovations, industry news, and practical challenges in the field. From DIY project hurdles to deep dives with industry experts, Parker and Stephen's real-world insights provide an engaging learning experience that bridges theory and practice for engineers at any stage of their career.

Whether you're a student eager to grasp what the job market seeks, or an engineer keen to stay ahead in the fast-paced tech world, Circuit Break is your go-to. The hosts, alongside a vibrant community of engineers, makers, and leaders, dissect product evolutions, demystify the journey of tech from lab to market, and reverse engineer the processes behind groundbreaking advancements. Their candid discussions not only enlighten but also inspire listeners to explore the limitless possibilities within electrical engineering.

Presented by MacroFab, a leader in electronics manufacturing services, Circuit Break connects listeners directly to the forefront of PCB design, assembly, and innovation. MacroFab's platform exemplifies the seamless integration of design and manufacturing, catering to a broad audience from hobbyists to professionals.

About the hosts: Parker, an expert in Embedded System Design and DSP, and Stephen, an aficionado of audio electronics and brewing tech, bring a wealth of knowledge and a unique perspective to the show. Their backgrounds in engineering and hands-on projects make each episode a blend of expertise, enthusiasm, and practical advice.

Join the conversation and community at our online engineering forum, where we delve deeper into each episode's content, gather your feedback, and explore the topics you're curious about. Subscribe to Circuit Break on your favorite podcast platform and become part of our journey through the fascinating world of electrical engineering.

Science

Technology

Dive into the electrifying world of electrical engineering with Circuit Break, a MacroFab podcast hosted by Parker Dillmann and Stephen Kraig. This dynamic duo, armed with practical experience and a palpable passion for tech, explores the latest innovations, industry news, and practical challenges in the field. From DIY project hurdles to deep dives with industry experts, Parker and Stephen's real-world insights provide an engaging learning experience that bridges theory and practice for engineers at any stage of their career. Whether you're a student eager to grasp what the job market seeks, or an engineer keen to stay ahead in the fast-paced tech world, Circuit Break is your go-to. The hosts, alongside a vibrant community of engineers, makers, and leaders, dissect product evolutions, demystify the journey of tech from lab to market, and reverse engineer the processes behind groundbreaking advancements. Their candid discussions not only enlighten but also inspire listeners to explore the limitless possibilities within electrical engineering. Presented by MacroFab, a leader in electronics manufacturing services, Circuit Break connects listeners directly to the forefront of PCB design, assembly, and innovation. MacroFab's platform exemplifies the seamless integration of design and manufacturing, catering to a broad audience from hobbyists to professionals. About the hosts: Parker, an expert in Embedded System Design and DSP, and Stephen, an aficionado of audio electronics and brewing tech, bring a wealth of knowledge and a unique perspective to the show. Their backgrounds in engineering and hands-on projects make each episode a blend of expertise, enthusiasm, and practical advice. Join the conversation and community at our online engineering forum, where we delve deeper into each episode's content, gather your feedback, and explore the topics you're curious about. Subscribe to Circuit Break on your favorite podcast platform and become part of our journey through the fascinating world of electrical engineering.

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