Category: basic building blocks

3590S-2-103L 10K Ohm Rotary Wirewound Precision Potentiometer Pot 10 Turn vs genuine Bourns and Vishay pots (WHL #36F1)

Quick follow-up on the fake Bourns pots – only thing you get when reporting IP stuff is the following mail and a case ID:

尊敬的客户: 您好!

案件单号:<ID>

感谢您的反馈,请提供更多的证明主张被举报的商品涉嫌侵权他人的知识产权,比如鉴定报告、权利人申明等。

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Beetle Virtual Keyboard BadUSB Pro Micro ATMEGA32U4 Module Mini Development Expansion Board For Arduino Leonardo R3 DC 5V I2C (WHL #37)

Having no internet connection because your telephone provider screws up is bad enough – but this time, I screwed up. D’oh…
Well, I’m back, and now speeds have doubled. And cost has halved. Was that worth two weeks of heavily limited 2G/4G cellphone tethering interwebs? I don’t know, I don’t want to do that again… :???:

Today’s item is a small Arduino compatible board. I bought this mid-February for 3.52€ including shipping on AliExpress, and it arrived yesterday.

Why do I buy such a limited version instead of one of the larger (Pro Micro/Mini, etc.) clones? […]


3590S-2-103L 10K Ohm Rotary Wirewound Precision Potentiometer Pot 10 Turn vs genuine Bourns and Vishay pots (WHL #36)

Visiting the dark side of China today – product piracy.

First things first, I actually bought this item twice from two different sellers on AliExpress. One back in September for 1.07€ and now two more for 0.95€ each in early January, just to be able to kill one during inspection. The seller may be the same (I’ve seen that recently from BME280 sensors, review to come), but the shop name is different. It is intended as replacement for the current adjustment knob on my electronic load, as I am an idiot and during build I set the voltage over the pot not to the two end pins, but to one pin and the wiper. […]


Breadboard friendly Four Decade Programmable Resistor Board, 1%, 1/4W, KIT (WHL #25)

Got some more Open Hardware today! Not mine, though…it’s a four decade resistor adapter from luftek, who apparently comes from Slovenia. He has a github repository for his project called Dekada if you want to check it out (literal git checkout is also possible :) ). I happened to buy Version 0.1 back in September 2016 for dirt-cheap 1.99 USD per unit – I bought two pieces via eBay, directly from luftek. Unlike the Wan Hung Lo guys, we in Europe generally have to pay a reasonable amount of money for postage…in this case 3.98 USD. […]


Black 0-9 Digits Single Unit Pushwheel Thumbwheel Switch (WHL #11)

Folks, this is a big one. I will split into two articles to make the item review available now and show the finished project later (once I got a box around it). Maybe even three articles to post DMM comparison data. Today, I will show the unit and the first measuring results.

Back in January ( :neutral: ) I bought a 10-pack of these dials for 5.33€ including shipping at AliExpress. I saw these in the EEVblog forums and decided to have a go. And now you know the purpose of the assorted SMD resistors in WHL #10 ;)

First things first: Shipping took ages, and quality is very Wan Hung Lo’ish. […]


0805 SMD Resistor,1% 123 valuesX10pcs=1230pcs,Chip Resistor Electronic Components Package, Resistor Samples kit (WHL #10)

10 Posts, and I haven’t overtaken Dave Jones in popularity yet. I’m clearly doing something wrong! Maybe I should change something…what about “let’s not complain”…for today? ;)

Really, I cannot gripe about today’s review item even though it actually is pretty far away from advertised. I have ordered a set of 0805 SMD resistors via AliExpress for the extremely high price of 3.87 Euros including shipping (that was actually back in January 2016 – stuff piles up!).

Sure, entire reels of 0805 resistors cost measly 10 Euros for 5000 pieces (1%), that’s next to nothing per unit. […]