DIY blinking LED

Electronics

Added 8 comments

You can use this circuit for turn signals on a motorcycle or bicycle.
Let's get started!

To solder this circuit, we need:
Transistor (n-p-n): KT315
Transistor (p-n-p): CT361
LED 4-5 Volts (it all depends on the voltage that we will feed the circuit)

Resistors:
1.1kOhm
2.100 ohms
3.270-470 kOhm
Capacitor from 100 Mkf (The frequency of LED flicker depends on the capacitance of the capacitor)
And 1 wire

We will solder the canopy (without the breadboard)

Photos of all components:

This is how the circuit looks:

VT1- KT361
VT2- KT315

Let's start the soldering!

1. We solder the transistor KT361 and 3 resistors.
To the right conclusion, to the base we solder R3 (270-470 kOhm)
Solder the medium to the collector R2 (100 Ohms)
Solder R1 (1 kOhm) to the left emitter

Here's what you should get:

2. To the fact that we managed to solder the second transistor - KT315

3. Solder the capacitor and LED.
The negative output of the capacitor to the negative output of the LED!

4. Connect the power and test the circuit.

I changed the capacitor to increase the frequency of flicker. You can change nothing and leave as well.

5 Volt Power
Video circuit work:

November 8, 2017 10:29 +3

Reply To quote A complaint

Inspired by ...
... For my 16th birthday, my grandfather gave me the IZH-Jupiter-5 motorcycle. A new modification (Izh-6.113.01) ... It was not my first motorcycle, but the first one - new and "legal" (With all documents and already with rights)))).
.. So, I really wanted to “twist” it, that I even assembled a multivibrator on the MP37-38 and MP39-42 in a similar scheme, only with a high frequency, and connected a speaker through it to the rotation circuit !!! Like, so as not to forget to turn off the turns, a buzzer will sound along with them !!!!
... So, that homemade product reminds me of some homemade products from our site - it was also made “in order to make it cool”))))).
After all, I understood that on the go I would not hear a buzzer behind the wind and the engine, and the control lamp - here it is, next to the speedometer in front of my eyes, but I did !!! )))) And proudly showed "non-motorcyclists" how cool it turned out for me !!!!

November 7, 2017 10:18 +3

KT361 has a letter in the middle, and KT315 - on the left.

November 7, 2017 09:03 +3

We have a circuit of an ordinary asymmetric multivibrator on transistors of different structures - p-n-p and n-p-n.The diagram shows the germanium transistors of the MP41 and MP37 series. The author collects a scheme for silicon KT315 and KT361. For the ignorant, you need to specify the location of the terminals on the transistors - if you turn the transistor with a slice toward you, then Base, Collector, Emitter will go from left to right. The KT315 and KT361 transistors are very easy to mix up. Marking KT361 contains a capital letter on the case, for example, A, B, C. The KT315 transistor is marked with a small letter, for example, a, b, c. And it can be inside a circle.

November 6, 2017 11:09 p.m. 0

Yes, there really is confusion in the text. And in series with the LED, it is necessary to put a current-limiting resistance, and so it can be ruined (I mean the LED).

November 6, 2017 20:51 +2

Just remove the unnecessary check marks before publishing the article.

November 6, 2017 19:10 Author +1

Moderators added, I didn’t write this

November 6, 2017 5:59 p.m. -2

LED 4-5 Volts (it all depends on the voltage that we will feed the circuit)

First, read what an LED is, how it is set.

Solder the medium to the collector R2 (100 Ohms)
Solder R1 (1 kOhm) to the left emitter

Have you tried to look at the circuit? Remember the word emitter at the same time.

to the negative terminal of the LED

The LED does not have such a conclusion, it only has a cathode and anode.

5 november 2017 21:24 +3

DIY blinking LED

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