I recently bought a DIY LED Clock kit from AliExpress(it was pretty cheap PLUS the PCB quality looks great), so I thought, I had to share my experience on the assembly, building and testing of it.
If you did like this one, Please Consider giving me a vote for Clocks Contest at the "Vote Now!" Button in the end of this epilogue. That could mean a lot to me. So for now, let's Build it!!
Step 1: Understanding the "Schematics"!
This part could get a little tricky....As I had mentioned earlier, since this kit is from China, so to my expectations, the schematics and the instruction manual were in CHINESE! So Great right!
But, I got a bit lucky as the components marked on the PCB weren't in Chinese. So it was easy to solder the respective components in the right location.
If you'd like to get a better understanding of this circuit, I suggest you to translate the "Instructions Manual" to any of your favourite language.
Step 2: Gather the Components!
1) The DiY LED Clock Kit - https://www.aliexpress.com/item/AT89C2051-Digital-...
2) 5V Regulator Circuit (step 4)
3)9 V battery and battery clip
You'll need to know some basic soldering and some circuit reading, and if you do, then you're good to go!
SOLDERING SHOULD BE ALWAYS BE PERFORMED IN A WELL VENTILATED AREA. WEAR NECESSARY PROTECTION IF NEEDED.
Step 3: Solder the Components!
Check the schematics and solder the components accordingly, then you're pretty much done!!
A Brief explanation about the DiY Clock Kit,
There are two ways of powering this kit. One. 5V and the other 3V. I'm probably going to stick to 5V. Thus, obviously I would need a 5V regulator. That's cooking up in the next step..!
There's a buzzer in the circuit that would buzz (obviously) if, either (1) a short circuit is found in the circuit or (2) the applied voltage goes below the threshold value a.k.a 5V
There are 2 push-buttons which aid you in setting the time and wandering thru' different modes of this clock.
Step 4: The 5V Regulator
For this one, You'll need,
1) 5V LM7805 IC (Linear)
2) Heat sink and screws (optional)
3) 1uF and 0.1uF capacitors
4) 3mm GREEN LED and 100 ohm Resistor (optional)
Just solder them according to the above schematic and your done! And yeah, take necessary precautions.
Also, I added a switch between the battery and the 5V Regulator circuit as it would be handy if I were to shut it down. I got rid of the terminal blocks and directly soldered the connections as they were causing some loose connections and breakages in the circuit. Moving on "Step 5".
There are tons and tons of circuits out there in the vast "Sources of the Internet", some of which might suggest you different capacitor values or capacitor ratio, some might contain different components along with the specified IC and so on. But 'I kinda felt that this is the most simple circuit one can come across as it is easy to understand and rather simple to build.' (This is my personal opinion)
Step 5: Sigh of Relief!
This setup works just fine and this was my experience on how to handle DIY kits of this sort. After all it's experience that makes you better at what you do!
I hope you enjoyed my Build Log and if did, give me a thumps up and Your Vote (You know what do)!
Thanks for Reading.
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1) Designing an enclosure for this project. Check it out at "The DiY LED Clock Kit - Part 2"
2) Hell lot of projects coming up people, so be sure to check'em out.