EEVblog #388 – Fake Apple USB Charger Teardown



Teardown Tuesday.
What is inside a fake clone A1265 Apple USB charger?
WARNING: These fakes and cheap no-name chargers are DANGEROUS. If you have one, throw it out and get a quality one.

Teardown of a real Apple USB charger: http://www.arcfn.com/2012/05/apple-iphone-charger-teardown-quality.html

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EEVblog #508 – Can You Test Battery Charge By Dropping It?



Can you determine the charge of an alkaline battery by simply dropping it and see how high it bounces?
A followup to the KipKay video: http://www.youtube.com/watch?v=nwfFBUVxpac
It seems KipKay’s video is the same as this earlier one: http://www.youtube.com/watch?v=Y_m6p99l6ME

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Homemade 12V Lead Acid Battery Charger – COMPLETED Version



Finally took the time to finish off my homemade battery charger for 12V lead acid batteries. I took a M.O.T. and stripped out the secondary, and wound roughly 20 turns of 12ga copper wire. 15.2 VDC open circuit. More turns of wire = higher voltage.

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Excellent & Simple Battery Charger (Gel/Lead Acid/Li-Ion/+ more)



This circuit has been in use for 24 hours a day over the past 4-6 months. It operates perfectly. I used this circuit to charge two 18650 Li-Ion batteries for my cordless vacuum cleaner. You can charge many different battery types with this circuit. If you charge (2) Li-Ion batteries in series as I did, be sure to affix a 3A/ 70-90 degree Celsius thermal fuse between both batteries using thermal heatsink compound and foil tape. The fuse will then be wired in series with the 2 batteries. Also set charger output voltage to 8.33V – 8.36V, and use a 1 ohm resistor in the circuit.

Schematic here:

http://www.talkingelectronics.com/projects/200TrCcts/101-200TrCcts.html#84B

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Solar Panel Giveaway! (Battery Maintainer & Charger)



Today I’ll be showing you a very nice, high efficiency, polycrystalline tempered glass 12W solar panel made by Suner Power. This panel can be used to maintain higher capacity lead acid batteries, charge all 12V lead acid batteries, or even power 12V devices/electronics that draw between 500 and 750mA of current. Enjoy the video, and be sure to take part in this giveaway so you have a chance to win one of these solar panels!

Product Links:
Suner Power 6W Solar Panel(Ideal for maintaining lower capacity lead acid batteries): https://amzn.to/2OToYzI
Suner Power 12W Solar Panel(Ideal for higher capacity lead acid battery charging or powering devices): https://amzn.to/2OsfhaC
(Amazon Affiliate Links)

Digital DC-DC Step Down Converter: https://bit.ly/2nuruQl
Digital Multimeter shown in video: https://bit.ly/2rapahk
(Use money saving discount codes shown below for Banggood)

Contest Link::
https://gleam.io/tQYMt/suner-power-12w-polycrystalline-solar-panelcharger-giveaway
(Duration of Contest is 10 Days. Once a winner has been chosen at random, I will post the winner’s name in the video comment section)

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**Try these money saving coupon codes: affiliate6 or aff7off or f8aaf1 or 781622 or 5719ed or elec** or ask if other codes are available!

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9V Alkaline Battery Charging Circuit(Also 1.5v Cells)



Learn how to make a good alkaline battery charger which is NOT likely to cause the batteries to leak or bulge, and will charge them properly. Though alkaline batteries are not intended to be recharged, they do seem to recharge well using this circuit. I put together this circuit from information obtained from the web page below. The circuit shown in the video was designed for 9V batteries, but you can also charge 1.5V (AA/AAA/AAAA)batteries by lowering the power supply voltage. The batteries are charged using low current DC pulses.

http://en.wikipedia.org/wiki/Recharging_alkaline_batteries

Schematic is here:

http://tinypic.com/m/k0oya1/4

For fully charged 9V LED indicator circuit:

http://tinypic.com/m/k0oydz/4

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Bedini SSG Battery Charger/Desulfator



This circuit uses a 12v battery to charge other 12v batteries to a higher voltage. According to John Bedini, you are getting more out of the circuit than you put into it(Which I have not proven). The high voltage that is created to charge the 12v battery is created by the back EMF from the coil.

Circuit/Schematic located here:

http://rpmgt.org/JoinBediniList.htm

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Inductive Battery Charging Circuit (NiMH/NiCd)



Learn how to make a simple inductive battery charger for your NiMH/NiCd rechargeable batteries(2 to 4). The circuit in the video is for charging (2) batteries in series. This circuit operates in a very similar way as an ultrasonic toothbrush charger. The charging rate is slow(25-30mA), which can be made higher if desired, but it does charge well. The toothbrush charger uses a PWM IC to produce the high frequency pulses (75khz) into the primary winding with feedback to adjust the output under load, and this circuit uses a 555 IC to produce 42-46khz pulses into the primary winding to simplify the circuit. The transformerless power supply shown in this video is designed to power the exact circuit shown in this video. If you modify the primary winding and the circuit draws more current, then you will have to modify the transformerless power supply to deliver more current. You can also power the circuit using a very small 12V transformer. Don’t be afraid to experiment with different coils/windings!

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Thank You For Watching!

Link to Charger Schematic:

http://tinypic.com/m/k0oydw/4

Link to Transformerless Power Supply:

http://tinypic.com/m/k0oydv/4

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EEVblog #811 – How The Varta 15 Minute Battery Charger Works



A look inside the Varta 15 minute 8A NiMH fast charger.
A teardown and look at how it works and the circuit topology.
Can Sanyo Eneloops be charged this fast too?
Part 2: https://www.youtube.com/watch?v=OgsWOHdDn2w
Forum: http://www.eevblog.com/forum/blog/eevblog-811-how-the-varta-15-minute-battery-charger-works/

Datasheets:
http://litel.com.pl/karty-produktow/Varta-AA-2100mah-56706-datasheet.pdf
http://www.din-tek.jp/Upload/Product%20Doc/Datasheet/DTM4410.pdf
http://www.ti.com/lit/ds/symlink/tl494.pdf

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Homemade 6V / 2.5 Amp Power Supply/Battery Charger



If your looking for a HIGHLY efficient (6VDC 2.5A / 6VAC 3.0A) power supply or 6V lead acid battery charger, then look no further. This power supply/charger is made using a 120V (MOT) microwave oven transformer, by performing the modifications shown in this video. 120V transformer current at idle(NO LOAD) only draws 30mA, and using a full 2.5A load, 200mA. NO heating issues of the core whatsoever. As usual, always be very careful when working with 120VAC/240VAC projects!

Thanks For Watching!

***If you enjoy watching my videos, please show your support by SUBSCRIBING, POSTING LINKS to my videos on other websites & blogs, rating a “THUMBS UP”, and watching my video playlists. Doing so helps to ensure that many more videos will be released in the future. (Views are essential to ensure this channel remains in an active state)***

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