Running LED Circuits

I think variation of blinking LED is art, Running LED circuits that i mean is a set of LED which blinking alternately. So that LED look like running with circular motion. As usual i rarely make PCB from blank PCB. But i often bought circuit PCB like this. Because it lower cost than make from blank PCB.

As usual, i got schematic paper like this

Main component of this circuit is IC timer 555 and CD 4017. I use Green LED, Blue LED and Red LED purpose to look like colorful. Total 20 of LED used. VR 20 K is potensiometer or trimpot that used to adjust speed of LED blink.

Top and bottom view of PCB

After Build

So, you can watch this video, please leave your comment, 

thank you for watching and visiting my Blog

Adjustable LED Flip Flop

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Simple LED Flip Flop

I tried to modify existing circuit by adding a stereo potensiometer so that the duration of blinking LED could be adjust. I use 100 K ohm potensiometer to adjust duration and 10 K Ohm that useful as limit base of each transistor.

Potensiometer and resistor 10 K Ohm use to substitute resistor 56 K Ohm.

So, you can watch this video and dont forget to leave your comment, Thanks......

Simple LED Flip Flop

LED Flip Flop is one of many circuits have I made when I start to learn about electronics circuits. In years of 2002 i often to assembling some circuits with PCB. Of course many PCB sold on the electronics part store at that time and until now. I like to assembling several LED circuits because all of them can blink with very beautiful.

Yesterday, I visited at electronics part store which old shopkeepers on my city. In the store, I looked from left to right. I admired because he still kept very old component and circuits PCB. How old this part can be seen from price on the package. I'm sure that is old price.

I bought some PCB, one of them is LED Flip Flop, you can look at this photo.

If i bought PCB Saturn product that well known merk, I always got a paper pieces that describe schematic of PCB like this.

Finally, I was assemble this, and I’m so happy because not for success to assemble but I can remember while sit in the Technical High School from 2002 to 2005.

And you can watch this Video. This circuits is simple to make and soldering.

Ohh...No.....Don’t Throw Your Empty Battery

In this post, I want to share about 1.5 Volt batteries that have been discharged. You have many empty battery in your house? Sometimes a battery that we use have not really empty. Generally, people will throw it away. but the battery still save a little of energy that can be used with a simple trick.

Joule thief is one of the tricks to use empty battery, joule thief will increase the battery voltage up to dozens volt. Joule Thief circuit is very simple to make. Many articles on the Internet that post this circuit, many communities on social media sharing and experimenting about this circuit. People often call this circuits with “JT”

Main component is

>> Transistor type C 9014

>> 14:14 coil with ferrite toroid from Power Supply of CPU and  wire from UTP cable.

>> 680 Ohm Resistor

>> 5 Watt LED HPL

>> Small Switch

>> Battery Housing

>> 1.5 Volt AA Battery

Joule thief is able to turn on the HPL LED only with 1 piece of 1.5 Volt battery. HPL LED is High Power LED which can lit if get voltage supply around 2.8 Volt. I use this circuits to emergency lamp. Besides that, I want to take advantage from empty battery before it really discharge.  So, there are many people develop this circuits become a mobile charger. Of course this makes me interested to try it. You can look this picture and video for more detail.

Simple Lamp Flasher

Long time ago, some student in my class said story about " How to make simple Lamp Flasher ". Of course i'm still on High School. My Friend said that we only need Incandescent Lamp and TL Starter to made this.

One day i got little time to made it, and somehow i'm happy with this experiment, I know some people maybe will laugh to me about this. Because it's too simple and many people ever did it. But I believe that sometimes, simple things are able to make you happy.

This is my lamp and TL starter, I Have been bought in an electrical store near my house.

And I have to assemble like this.

You can watch this video to more detail.

Thanks for watching and visiting my blog. :)