Monthly Archives: February 2014

2 AAA battery 5v and 3.3v PSU

Just cause I wanted to, and also if it work, it may power future projects that I might fancy, I decided to design up a Power Supply Unit which supplies the 2 most common digital logic voltage levels using either 2 rechargeable or single use AAA batteries.

With a single non rechargeable AAA battery measuring in at 1.5v and a rechargeable AAA 1.25v, 2 of them in series would give me a max 3v. To get it up to 5v, I started looking for a Boost Converter.
I eventually settled on the MAX1674 SMPS, mainly because it was cheap and had fairly good efficiency at higher load levels.

I then stepped the 5v down to 3.3 using the RT9198/A linear regulator.

Throw in an LED to indicate that everything is running smoothly and walah~! Behold the design!!

The board is 26mm x 16mm

All that’s left now is to actually build it and test it…

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Posted by on February 27, 2014 in Electronics and Circuits, Projects


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New desktop PC build

So, I’m now in the process of drawing up a new build since my current PC is having stability issues and is overall old

So without further ado, this parts list so far:

New Parts
[$399] CPU – Intel Core i7 4770K LGA1150 CPU 3.5Ghz – Source
[$430] Motherboard – ASUS MAXIMUS VI FORMULA – Source
[$245] RAM – Corsair DDR3 Vengeance PRO 2400MHz 16GB (2x8GB) – Source
[$649] Graphics Card – EVGA 780 Dual FTW ACXSource
[$125] Case – Fractal Design ARC Midi R2 – Source
[$149 + $10] CPU Cooler – NZXT Kraken X60Source
——–WITH Replaced Fans
——–2*[$33] Fan – Noctua 140mm NF-A14 – Source

[Subtotal: $2073]

Salvageable Parts
[] PSU –
[] Sound Card – Sound Blaster Titanium XFI Fatality Pro

Considered but rejected parts:
[$85] CPU Cooler – Noctua NH-U14S – Source
[$88] CPU Cooler – Noctua NH-D14 – Source
[$125] CPU Cooler – Zalman R3MAX Liquid Cooling – Source
[$109] CPU Cooler – Zalman LQ320 – Source

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Posted by on February 12, 2014 in Projects


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