Archive for June, 2012

Atten 3005S Power Supply Unboxing and Quick Teardown (Review to come soon!)

Recently I have been in need for a proper power supply as I have been tired of using the LM317 power supply that I first made. After a lot of research and searching I have finally made the decision to buy a cheap power supply just for the moment, while I am still trying out very simple circuits which do not require a specialised power supply for them. My choice of power supply finished at the Atten 3003S. Since I already have another Atten product – The 858D+ hot air rework station (as seen in the background of the image below) and I because I was very pleased with the construction and the quality I decided to go along and order the power supply. The price for the 3003S is just under $100 which is a perfect price for an electronics hobbyist. The power supply took about 3 days to order since it was coming from an Australian seller (eBay seller “carmates”) and not from overseas. Upon receiving the product I was very surprised that they shipped it in the original box instead of putting in into another box for protection. Luckily the power supply survived the journey and was received in excellent condition.

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Square Wave Generator with Adjustable Frequency 1Hz to 1Khz


Recently I needed a square wave to mess around with some filters, however I didn’t have one. So I decided to build one based on the ever so popular 555 timer chip!  My inspiration is from the Australia electronics magazine Talking Electronics, the project is in Issue 3. After a bit of research about the 555 and how it works, I created the final circuit ready to be used. The circuit is below (I still don’t have a proper circuit schematic drawer program, so please excuse the illustration):

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Sony Vaio VGN-SZ5XRN Teardown (and possibly a project!)

I recently acquired a Sony Vaio VGN-SZ Series laptop computer from a friend who said it was overheating too much. The computer is 4 years old as it was released in 2008. The specs on the computer are very nice with 2GB RAM, a 2.00Ghz Intel processor and NVIDIA GeForce 7400 graphics. This is an excellent laptop for carrying around as a work laptop as it has a nice and sleek shape for its age. You could probably already work out from the image below that this laptop has already gone through quite a beating with the sides gone and the keyboard just holding on with its last few notches…

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Rappo BT Ultra-slim Keyboard for iPad E6300 – Review and Teardown

Some people like to use the iPad onscreen keyboard, while others find it easier to use a separate more “physical” keyboard.  I was very lucky to obtain a Rappo BT Ultra-slim Keyboard for iPad E6300

, but also very unlucky to be able to use it only for a few days before its obvious flaws came out. So today we have a review and teardown of this wireless keyboard which made for iPad, can also be used for a Mac computer. Below is an overview on the keyboard.

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$4 Multimeter!

You know those really cheap $4 multimeters that you see on eBay and Amazon all the time?

 

Nippon Labs TST-MM2003 Digital Multimeter

Generic DT830D LCD Digital Voltmeter Ammeter Ohm Multimeter With Test Leads Color Black

Generic Digital Multitester DT-830B LCD Display Multi Function Tester Color Black

Being myself, I couldn’t resist and I had to buy one! So just a few days ago it came in from the post  and I gotta admit that it took it an awful long amount of time to get here, almost 3 weeks! Besides that the thing came in a padded envelope and even with that the box was still a bit crunched up, but the multimeter was safe!

My impressions will this whole thing was a big roller coaster, but lets start from the beginning. First impressions, the packaging was fairly cheap and the box looked like it had been through a big journey. The instruction manual was surprisingly well written for such a cheap multimeter and the multimeter and probes felt very solid and quality.

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