Tag: power consumption

Waveshare 400×300 4.2″ three-color SPI E-Ink / E-Paper display module (WHL #38)

Bit of an upmarket item for today, not the usual Wan Hung Lo…had the honour to make that thing display some demo content for a side project at work. So…why not take some photos, publish the code, and get ahold of a similar unit for use at home?

So this is an e-Paper / e-Ink display, actually a module that consists of the display unit itself and a base PCB that takes the flimsy flat-flex connector, adds some passives and presents a more sturdy interface to the microcontroller that will be handling the thing. Also, the PCB is large enough to offer mount points on each corner. […]


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? […]


DC5V USB PORT 10X10CM El panel Electroluminescent BackLight panel el foil el paper el sheet Led Board Display with Inverter (WHL #35)

Here’s another random thing from a colleague: A small Electroluminescent panel!

I was asked for an area lighting thingy that is slightly flexible. So unless one wants to bend the stiff backing of a mobile phone backlight unit, EL foil seems to be the solution. I’m not sure if that fits his needs, but I’m confident he’ll tell me if it’s not ;) I bought this thing quite recently on AliExpress (mid-January 2018) for 5.22€ including shipping. Yes, shipping cost have increased by a bit, but shipping times have improved as well. […]


Weißen 128×64 0,96 zoll oled lcd led-display-modul für arduino 0,96″ IIC spi kommunizieren (WHL #6)

…Hi :cool:

I know, it’s been a while. Busy working, busy moving, busy buying metric shittons of furniture that’s not easily available in my size (or budget, or space, or all of them) and takes ages for delivery. Although this city is considered large for German terms, it’s not easy to get what you want – you might as well live in a backwater town. Well, actually I moved to such a lovely place and I couldn’t be more satisfied :)

About the promised “organic” next post: Here it is, I’m back. I’ll also throw in the other headline descriptions, as I actually bought another one for me (which I will review now), and two more for a work colleague who already snitched my first unit. […]