Posts tagged EEVblog

EEVblog #35 – Inside the Varta 15 minute NiMH Battery Charger

25
191 days
by in Laptop Battery Videos

Dave cracks open the Varta 15 minute NiMH battery charger, what will he find?


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Designing a Li-Ion Battery Gauge with the LM3914 – EEVblog #204

25
230 days
by in Laptop Battery Videos

How to design, prototype and test a two cell 18650 Lithium Ion battery pack level gauge using the classic LM3914 dot/bargraph display driver chip. A favorite from Dave’s youth! Dave gives you all you need to know to implement a simple expanded scale voltmeter with the LM3914, without adjustment pots to tweak. This one works from 6V to 8.4V – the usable capacity of a two 2 cell 4.2V Li-Ion batttery pack.
Video Rating: 4 / 5


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EEVblog #102 – DIY Constant Current Dummy Load for Power Supply and Battery Testing

22
271 days
by in Laptop Battery Videos

Dave grabs a few junkbox parts and builds a useful constant current load for switch mode power supply, battery testing, and other applications.
Video Rating: 4 / 5


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EEVblog #140 – Battery Capacity Tutorial

25
843 days
by in Laptop Battery Videos

Ever wanted to know what battery capacity is? Dave takes you through everything you need to know about amp-hours, mAh, watt hours, internal or series resistance, temperature effects, battery cutoff voltages, and characteristic curves. Part 2 coming soon.
Video Rating: 0 / 5


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