LED Water Level Circuit with ULN2003 - PCB Tutorial
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- เผยแพร่เมื่อ 13 พ.ค. 2024
- ► $2 for 2-Layer PCBs & $7 for 4-Layer PCBs: jlcpcb.com
This is a LED circuit for measuring water level, based on ULN2003 a darlington transistor arrays IC. The water level is represented on 7 LEDs, where Red LED indicates lack of water and last green LED indicates 100% of the full tank. This circuit is designed to be used with tap water, do not use it with salt water and any flammable liquid.
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After trying the excellent service offered by JLCPCB I recommend it, the quality of the PCB is high, customer service is always available and professional, the time of realization is short and the delivery of PCBs is by express courier. JLCPCB is a great place to get hight quality custom circuit boards at an extremely low price, you can buy 5 PCB Boards (Any Color) for 2$ !!!
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Components:
- 1x ULN2003 IC [ bit.ly/3j9ZZpR ]
- 1x 16 pin DIP [ bit.ly/3kc9Ixw ]
- 8x 1K Resistors [ bit.ly/2ytgn3e ]
- 7x LED 5mm [ bit.ly/2UzRDgR ]
- 1x LED 3mm [ bit.ly/39vXOd0 ]
- Wire (Like IDE cable)
- PCB: (Ready for jlcpcb.com): bit.ly/3j2yYEH
*Don't use my PCB for profit or sponsored videos.
This circuit must be powered with 12V DC, below I leave the references to view: the electronic circuit diagram, the PCB and the Gerber file to be uploaded directly on the JLCPCB website.
For any other questions you can ask me for explanations in the video comments:)
Chapters:
0:00 - Intro
2:22 - Unboxing
3:03 - Assembly
5:42 - Test
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WARNING: This video is only for demonstration. I don't take any responsibility.
#Water #Circuit #LED - วิทยาศาสตร์และเทคโนโลยี
Hello =) Leave a LIKE! and if you missed it, this is my previous video about the LED Police Light: th-cam.com/video/PtmEqcRbu4w/w-d-xo.html
Your channel is a gold mine! I loved your content!
Thank you so much for appreciating my work :)
simple & sober project excellent sir
Hello! Thank you very much for your videos. I am Brazilian and I love your projects. Thanks for sharing the gerber. It's very nice. I am 54 years old, but I feel like a child with his projects. Obrigado
Hi, thank you so much for appreciating my work! Obrigado!
that is an interesting circuit bro I never thought of having a LED liquid level indicator cool man 😊
Hi, thank you very much! in the past I also made a version of this circuit with transistors
Great job , thanks a lot for PCB file
Thanks you for appreciating my work!
Nice project, thank you for share :) Just one question, what maximum cable length does the integrated circuit support to be able to turn on the leds without problems?
Nice project
Thank you :)
Can it work with a 9volt battery. If so how would the resisters change.
It for half an hour only, after that all less goes off. If I switch off and again on the circuit, leds giving just small blink and then turning off. Pls give a solution

BUENOS DIAS GRACIAS POR COMPARTIR Y QUISIERA SABER COMO COMPRAR OENCARGAR EL CIRCUITO IMPRESO GRACIASSSS
What about water electrolysis? I want to make a water level indicator for my bedroom evaporative humidifier.
Hello there. I'm new to this but you make this look very easy. Could I ask you where I can buy 3 of these PCB's please? I'm in the UK. Thanks.
I have made my own using these components.
# 433mhz RF module for wireless communication,
# two arduino nano,
# one HC-SR04 ultrasonic sensor to check water level in the tank,
# one relay to actuate motor,
# 16x2 lcd (i2c) it shows the percentage of water in the tank,
# one touch sensor to turn-on motor, # rgb led to indicate water level,
# two Hi-link SMPS to power both setups one in the tank and another near motor or wherever u want to place in the house....
#when i touch the surface of touch sensor motor turns-on when water level reaches 100% then motor turns-off automatically. I have been using it since last two months and its working perfectly. I also made it for my friend he is satisfied with that too
necesito 4 placas de este circuito electronico como los compro????
What is the difference between unl2003A and unl2003L ?
Hello my friend. How are you? Today the PCBs that I bought at JLPCB arrived. Very fast delivery, just two weeks. I loved the PDB´s. I bought VU meter, Led Thermomete, ULN_2003_water, Police Light. Everything very cheap. Thanks!
Hi, thanks to you for appreciating my work :)
Ye pcb milti h kya
is there a way to add a buzzer for tank full indication but should turn off automatically after duration like 2-3 min as water after filling will be there for quite sometime at full tank state
Hi, a buzzer with a timer circuit should be added, which turns off the buzzer after a certain time
hello what program do you use to make your circuits example proteus, fritzing
Hello, i use Sprint Layout 6.0
Remove tank full top led and connect or contact parallel with 12v buzzer ,,,,, 👍
Dc volt ? , 9 volt led 2 working other not working
I want to buy the complete set as above, where can I buy it?
Hi, I share PCB gerber file, you can use it to order pcbs from manufacturers like JLCPCB
Nice one. Can i use another resistor instead of 1k Ohm? Please reply me
Hi, yes if it is a value close to 1K
@@Stefano91ste I've already tested it, 1K resistor for LED and 10K for Tanky side wire is best for this circuit... Thanks for reply by the way
Did you check it With the distance of over head tank and ground level ?
Hi, I didn't understand the question, but in a 2 meter high tank it works fine.. with higher heights it should work but I can't guarantee it.
No.problem about the height.
You did not speak a word, but explained it well
Thank you so much!
Can we read as digital value from this IC to microcontroller?
Hi, no only analog signal
@@Stefano91ste I might can catch only HIGH _LOW from this? Isn't it?
Hi there! I need 4 of them, can you sale does to the public?
Hi, I don't sell PCBs, I shared the gerber file in video description
What is resistor value if I'm going to use 3mm led?
Hi, use the same 1 Kohm resistors :)
Is it ok to use for fuel in tank..?
No, only for water
Muy bien trabajo, sólo tiene un problema....
What problem?
@@Stefano91ste se oxida(sulfata) el cobre cuando hace contacto con el agua....estoy buscando un material para ese problema.
hello. i would like to buy this pcb. how can i do it
Hi, you can download the pcb file from the description of this video and order the pcb on JLCPCB, in the video I show the whole procedure.
Can I use this overhead tank 25 ft
Yes you can
Do you have any of these for sale?
No, I don't have any more, but you can order as many as you want from jlcpcb, in video description you can find the gerber files for this PCB
Can you do it with 5 volts?
Yes, but with transistor like this: th-cam.com/video/XKGtgbS1Ovw/w-d-xo.html
I want blank PCB for this project.
You can order it on JLCPCB using the gerber file I shared in video description
Hola algún número para contactarte ?
Che misure sono del pcb? Sull'ordine bisogna inserirle?
Ciao, no una volta caricato il file il sito riconosce le misure, ad ogni modo sono meno di 10x10 cm in modo da restare nel range per l’offerta dei 2$
@@Stefano91ste grazie stefano .......gentilissimo.Ti chiedo una cosa, volendo inserire un sensore di rilevamento ad ultrasuoni ( per evitare corrosione fili a lungo termine), c'e la possibilità di farlo?
not working in water
😎😎😎
Does anyone out there have a board for sale?
Hi, you can download the PCB files from the video description and buy the boards on the JLCPCB website
I need one pcb can u send ..
Hi, I can't ship PCBs
Show show
Thank you :)
Sir app ka mobile number kya hai