I got this digital clock/temperature/date kit from the web site Banggood.com in China. I get a lot of my cheap “toys” from China and mostly I don’t have problems with them IF you can understand the Chinese/English instructions. This kit cost £5.84 a good price, or £6.66 with a perspex case, a much better deal as the case separate will cost you £3. It also comes with 3 or 4 different coloured (damned American spell checker, lol) displays.
If you have a young child that wants to learn soldering and basic electronics this is a great kit as it easy to assemble and they get something they can see and use every day. It might even wake them up for school!
It’s USB powered just like the world is these days. The only bad thing about it is that the date is in American format of Month – Day. So damn stupid, who would have that numbering format. The rest of the world starts with the smallest factor (day) and goes to the largest factor (year). Don’t get me wrong, I think of America as my real home, after all I spent more of my working life their that any place else. I digress…
The kit was well packed and had all the right parts, this is a good start. With one sheet of paper for the build instructions, but Banggood.com has a good YouTube video available.
A really well made and designed PCB, they layout of all of the components was very good.
So here I go, bottle of water on the left and a glass of wine on the right, check, all ready.
So I am waiting for a “few” files to download from my blog, this should be enough time, lol.
All done.. The thermistor, the part sticking out is meant to be like that as it’s the temperature sensor, also the blank area to the left is for other power sources. Between the two orange parts (capacitors) is a photoresistor (the round part with the wiggle lines) that changes the intensity of the display in the dark.
The person that designed this PCB (Printer Circuit Board) does it the same way I used to, laying out all the parts in a nice order and orientation, nice job.
The small IC (Integrated Circuit) is the clock chip and is battery backed by the small 3.7v button cell. The large IC is the brains.
I picked the white display thou in this picture they look blue. I was going to run it off one of my battery packs but the clock draws only 40mA and my stupid pack thinks that nothing is connected and shuts down after 10 seconds.