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Description
Price: $8.69
(as of Dec 23, 2024 03:58:56 UTC – Details)
Description:
This package is mainly decimal counter circuit and circuit generated by the clock , from the core of the self-excited NE555 multivibrator power through R2, R3, R4 charge the capacitor C1, C1 started when charging , NE555 2 feet still in low, so the output pin 3 goes high when power through R2, R3, R4 to charge C1 to 2/3 of the supply voltage , the output pin 3 level from high to low , NE555 conducting internal discharge , capacitor C1 through R4, R3, NE555 7 feet discharge until the voltage across C1 is less than 1 /3 of the supply voltage , NE555 and 3 feet level from low to high . C1 and charge again this cycle oscillations formed.
Charging time: 0.695 (R2 + R3 + R4) C1, discharge time: 0.695 (R4 + R3) C1, R4 can be adjusted to control the output frequency of the oscillator , the oscillation clock signal is applied continuously NE555 CD4017 14 feet , the output terminal 10 is connected with the CD4017 10 LED, when the output terminal 10 turns CD4017 generated clock signal is applied at a high level , the D1 – D10 are sequentially lit to form a water -light effect .
100% new and high quality
Supply Voltage :2.5 – 14 .5 V
Weight: 30g (1LB=453.59g)
Color: As picture shows
Quantity:5Pcs
Note:
Light shooting and different displays may causethe color of the item in the picture a little different from the real thing.The measurement allowed error is+/-1-3cm.
We highly appreciate all custome rsopinions to improvethe selling, also if anything you unsatisfied, please contact us for probable best solution. Thank you
Package Included:
5Pcs NE555 CD4017 Chaser Flowing Water Red Light LED DIY Kit Soldering Practice Kits(If there are any problems with the product, please send us pictures.Tell us more details about this problem)
You can adjust the flow rate adjustment R4 LED lights.
Board Size: 53mm*19mm (1inch=25.4mm)
Flow Water Lamp Circuit : CD4017,NE555 ,LED;after correct connnection,it will operate
Package Included:5Pcs NE555 CD4017 Chaser Flowing Water Red Light LED DIY Kit Soldering Practice Kits(If there are any problems with the product, please send us pictures.Tell us more details about this problem.)
Thank you so much for your purchasing from our store.Any question ,please feel free to contact us.
Matthew F.December 23, 2024
Magnifying glass, tweezers needed for tiny, surface mount components.
I purchased this to test as an introduction to soldering project for my class (I teach at a local high school). I should’ve read the specs a bit more and maybe I would’ve realized this but I was lured in by the high rating and cheap price so I thought I would try it. Upon opening the package, I quickly realized this is not the kit you want for a student getting their first experience soldering. The LEDs themselves and the potentiometer are fine, but the resistors (x12), capacitors (x2), and the ICs (x2), are all tiny, surface mount components that have very little space to operate with. I included a pic of the 10-pack of resistors and the larger of the two surface mount IC chips so you could see the scale of them compared to a normal-sized adult hand. I wouldn’t say there is anything in the description that is misleading, but I think it should be labeled as “surface mount” and probably SHOULDN’T be labeled just as “soldering practice” as I believe that implies that it is a beginner’s project and there is no way our introduction students will be able to manage these tiny parts.
Shaofu ChangDecember 23, 2024
easy to solder, all five works
Its probably not what you want to try if you’ve never tried to solder SMD. you’ll need a steady hand, plenty of flux, and a good pair of tweezers. that being said, if you’re used to reworking SMD on circuit boards it should not no more than 15-30 minutes to assemble per unit. No need for wave or reflow, as neither the 555 or the 4017 has an exposed pad, everything in this kit has contacts you can reach from the outside. This is an intermediate level solder kit, Its not like this kit involves TSSOP-8 EP or a QFN QFP BGA where you really have to suffer when you make a mistake without hot air support.
B.B.December 23, 2024
Surface mount
Excellent product. Not for those without surface-mount experience, skills and the right tools.
Kl0wN KiLLeRDecember 23, 2024
DON”T BUY!!!
These components are WAVE SOLDER! unless you have a wave soldering machine there is no way to solder the components to the board! The only parts that can be soldered are the LEDs and the potentiometer. Waste of money!
jonathan barnesDecember 23, 2024
Difficult
Very difficult to solder, very small, and no directions. It does work if you have a magnifying glass and are good with a soldering iron but jeez. Not easy
Tyler OwenDecember 23, 2024
Works
Only done 1 so far, but it works. Make sure you have a 2xAA holder with alligator clips to power it. Got 5 for about $8, great for keeping skills sharp and practicing with new equipment/supplies. I’ll probably order more at some point for testing new stuff.