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Simple light off timer circuit using 1 transistor
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- Опубліковано 26 лип 2018
- I found lots of NPN Silicon Phototransistors on eBay. For the MOSFET a IRF510 will work. Lots of them on eBay also.
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switch: amzn.to/2LqtAOZ
Resistor: amzn.to/2mMLFIX
Electrolytic Capacitor: amzn.to/2LwZWso
BC547 Transistor: amzn.to/2OqNCaS
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What if I want to off a led with 5v.
I mean,
I have a LED of 5v and one of its sides has a transistor connected with emitter & collector. What I want to do is when there no supply available to the base, the light should be on but if the base gets connected to +ve the light should be off.
Muito bacana legal
ERROR noted. What was built shows the capacitor between the Base & Emitter. The schematic is an example of a RC timing circuit and shows the Base is only connected to one end of the 100k resistor. When the switch is closed, the capacitor charges instantly. When the switch is released, the cap will slowly discharge through the 100k resistor and the base/emitter junction, keeping the light on till the base/emitter junction voltage drops below 0.6V. To have longer time delays, use a N-Channel MOSFET.
Hello. Can you please upload a timer circuit with 2 adjustments? 1 for OFF time and one for ON time
Cool video, well done,thanks for sharing it with us :)
Place the LED between collector and emitter pin and and this will be turn on circuit..
BTW nice circuit..
absolutely right!!!
Very Nice circuit, i ask how can i make it glow off faster, when off make it instantenly??
Regards.
Liked before watching!!
thanks
Thats not a time. Thats delay.
Timer means when electricity is supplied, it glows for specific time and then turns off
Can you make adjustable LED strobe light with 5/6 v
V good practice brother. ...well done. ....keep going. ..G job👍
Thank you so much ☺️
Please subscribe!!
Sir I want to make a laser burner driver but I don't have lm317 I only have transistor and resistor please show me how I can build this circuit.
Are bahipo kamal kore diyecho
Thanks sir😃
I have applied on the breadboard. .....👌
great
Nice video!!
thank you
Nice video
Suppose if I use to light 12V LED then what value of resistor to be used, Can you please let me know ?
860 ohms
For beginners is there an explanation on how it works. Circuit working description
Great 👌
thanks
If I use a bigger capacitor will it increase the time taken to glow?
Yes
Can I do the same for burning laser diode please?
Can it be triggered by a grounding instead of supplying power?
hiii
Nice
How can I get the light to go off in a 4 or 5 hours (not 30-40 seconds)? What would I need to do for that length of time?
Use bigger capacitor
@@Creativecreator Thanks! Approximately how large? What is the calculation that I would use to figure that capacitor needed?
Just buy couple of 2200uf caps and parallel one bu one capacitor as long delay you need
@@Creativecreator Thank you! :)
Hello sir, can we make the same circuit type that off's after 4 hours? Can u help me in doing this?
Hi, I am looking for one as well for 8 hours for a oval sign that is about 20 inches x 10 inches. Let me know if you hav any info to share? thanks!
Niec video
great
Bc547 is npn
Wow, Great
Thanks
Pueden usar otro transistor que no sea el Bc547,por lo menos den otra opción, la mayoría de los videos que he visto usan ese,en verdad den otra opción.
Hi sir
In this video i want blinking led this is great
What type of blinking you want....
Multimetro???
Ye 5 volt pr bhi work krega.. 12 volt ki place pe
Nc bro
Thank you
i can make this without the transistor.
I can use 8 led?
yes
Sirji इतना अटर्म झटरम लगाने की क्या जरूरत थी जब काम डायरेक्ट बाला ही हो रहा है तो ?
कुछ ऐसा बनाओ जिसमें फिक्स टाइम के बाद ही बल्ब जले । और जिसका टाइम घटाया या बढ़ाया भी जा सके
Are you indian? Nice!
Yes
Agar 12v led strip k saath aisa karna ho to kya kare
Use a Power Mosfet for running the LED Strip
Can you explain it with a video please...🙏
But i need very light weight with 3 V
The light turning off i like me finishing my pee stream dribble
Can build on delay timer before on...?
If you use micro controller or any 555 timer it will be best
Ok thanks
But i want to use one transistor, capacitor, or 3V battery 4 sec delay on timer before on if this circuit possible may shere video .....?
Plz build circuit on like this video.. :-)
ua-cam.com/video/3YWcgOD9ZlE/v-deo.html
like this
Plz make it esy soldring like your
video...
oh curcit me 100 k. kehi bi nahi jori doosri side. Wrong ha
samjha nahi bhi????
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