Music Lantern using SMDS @ 0805
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- Опубликовано: 8 фев 2025
- Music Lantern that plays a tune and flashes lights !
SMD 0805 Soldering practice!
The only issues were the orientation of the CD4060BM IC.
Switch did not work and not sure why?
I desoldered and resoldered but problem not solved.
The only way to get this kit to work is to bridge the two tracks underneath the board.
Quite an interesting squeaker, it's bad that there is no assembly process, people like it.
Thank you for not forgetting, I am very pleased.
Yeah you're right it is a squeaker Konstantine :) ha ha and yeah it would be much better if they had good instructions with the kit. :-D I wandered where you got to. I hope you are okay. I read some bad things about what's happening in UKR.
@@decem_unosquattro9538 Yes, unfortunately, good things rarely happen to us now.
But we try to be happy just because we are still alive.
I read every day the situation in your country. I just assume that everything that is black is actually white, and everything that is white is actually black. I've given up on mainstream media. I imagine you are living without pwr, and without gas. It's not good here either. The costs of living are getting higher and higher. More businesses are going bankrupt and things we buy are getting harder to get. I bought timber yesterday which was bowed and not square. A large trucking company went into receivership which supplies food to our three major supermarkets. 1500 jobs maybe lost.
That's on top of three or four big housing builders that went broke.
Sanctions are hurting us because timber is harder to get now. I read one third of timber comes from RUS.
Despite the gloom I manage to keep soldering more kits which is always interesting and fun. I'm building small digital clocks. Three so far are partially working but time doesn't advance. I downloaded an instruction manual from ICStation (TJ-56-619 4Bit Digital Electronic Clock DIY KIT). Looking at the shematic in the instructions it appears 4 resistors are of the wrong values. 😕 R2, R3, R19, R10.
R2 is 1K in the kit I bought. It should be 1.2K.
This SMD resistor is connected to the two smd LEDs which is connected to TP5400 U1 IC (lithium battery management chip). As we know this would lighten the brightness of the two SMD LEDs.
R3 is 1.1K but on the ICStation shematic it should be 1.2K ohm.
How this will affect the battery charging circuit I don't know?
R19, is again 1K but in ICStation shematic it should be 1.2K.
This resister is connected to Q2 which is S9012 transistor that switches vibration motor of and on.
If current is too high how does it affect the transistor? Maybe its okay and within tolerances but if it's too high how will that affect the transistor?
R10 again is connected to another S9012 transistor which is connected to the clock buzzer. I think it does work but not very loud and doesn't stay on for long enough. :-?
I'm now wondering whether maybe I destroyed all three 32.768Khz crystal oscillators?
Probability is low.
I haven't destroyed any other crystal oscillator on any other digital clock kit.
I tried replacing two 22pF smd caps on my kits thinking maybe the smd caps supplied in the kit were not the correct values. 🤔
These 2pF caps are connected to the crystal oscillator.
Everything appears to work except the time doesn't move or doesn't advance.
It just stays at the set time e.g. 14:28 and never moves. Hours later it's still 14:28 (24 hour time only)
Auto brightness and manual brightness work correctly so that the 4bit digital tube functions as intended.
**Stopwatch** is setable and works correctly.
**Countdown Timer** is stable and works as it is meant to.
**Fu-1** works its sets the time correctly.
**Fu-2** sets the date
**Fu-3** it's sets first alarm
**Fu-4** it sets the second alarm
**Fu-5** it sets hourly chime, and display brightness manually 1~15 or automatically using the photo-resistor.
**Fu-6**Vibration Motor off or on.
**Fu-7** temperature calibration (assume it works)
Things that don't work or don't appear to work correctly.
- buzzer short duration?
- LEDs are a bit too bright.
- time doesn't advance forward?
Anyway I shall modify the resistors to the shematic not the kit list values.
Try to prepare for the worst Konstantine.
Take care and hopefully this war will end sooner than later.
Dec ❤️