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Mini power bank runs on garbage batteries #jlcpcb
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I made my own LED module (because others sucked)
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🟢 Limited time: $2 for 6-layer PCBs up to 100x100mm - grab your $33 coupon now: https://jlcpcb.com/events/6-layer-pcb?from=LeftyMaker You do not want to use a high-power LED with a series resistor. Technically, you can if you have no other options, but there are problems you may run into. That's why I've been experimenting with LED drivers, which can solve a lot of issues. Efficiency: an LED driver can be more efficient than a series resistor, thus improving battery life and generating less hea
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🟢 Limited time: $2 for 6-layer PCBs up to 100x100mm - grab your $33 cou…
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LeftyMaker | I had to use a Zener diode in a practical circuit for the first time, and of course, I made a mistake. To reach their zener voltage, Zener... | Instagram
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LeftyMaker | I had to use a Zener diode in a practical circuit for the f…
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Instagramleftymaker
LeftyMaker on Instagram: "Discover Easy, Affordable, and Reliable PCB manufacturing with JLCPCB! Register to get $70 New customer coupons: https://jlcpcb.com/?from=LeftyMaker I added a supercapacitor to the no-battery flashlight. I also added buck and boost converters to manage the voltage coming in and out of the capacitor. This allows the flashlight to stay on even after I stop pumping the handle for the mechanical generator. I ended up using two 2.7V supercapacitors which provide an additiona
LeftyMaker on Instagram: "Discover Easy, Affordable, and Reliable PC…
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Instagramleftymaker
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