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......
I was buy some circuits PCB not only LED circuits but also Siren Circuits.
Siren is like alarm which scream tone. In my country, siren often use in firefighter
car otherwise launch time alarm for worker in the industrial factory . This is
PCB that I was buy.
After open plastic package, I got this pieces of paper and PCB of course .
And It was i assemble like this
After that i use Push Button Switch according schematic paper. Push Button Switch use to start and stop siren buzzing. When position start ( Push Button Pushed ), The Siren sound is longer then higher tone. When position stop ( Push Button Release), The Siren sound is longer then lower tone until silent. This is it.
You can look this picture to overall wiring, I use 8 Ohm, 0.5 Watt mini speaker 2.5 Inch. On the schematic paper describe that circuits work at 6 Volt. But i prefer to use 9 Volt Battery.
And you can watch this Video. This circuits is simple to make and soldering.
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.
In the bathrooms, sometimes i often open the tap water to
fill the water tank and leave it to do other activities. But i often forgot to close
tap water, After that, the water is spilled to much. Because water direct flow
from electric pump, of course it also make a wasteful electricity.
Not all water
filling in the bathroom using automatic valves that will close when the water
is full. One easy solution is install a water level alarm. The alarm will buzzing
to people to tell that the tub is full. Water level alarm can be assembled with very easy. And then some
of the main components that used are :
9v battery
Piezo buzzer
Transistor c 9014
470 ohm resistor
This is
schematic of water level alarm that I was use, This is so simple and just need
only 4 component electronics to make it work.
This is water level alarm that I was build. I soldering all
component on PCB. I use two copper for water sensor. I got copper from piece of
NYM cable. when both copper exposed to water, the alarm will sounding “ Tiiiiit……………”
this is a picture of the installation the circuit in the
bathroom, both of copper can adjusted to level water which desired.
Why use batteries? This is the best way to avoid electrical
line hazards. Of course safety is the main reason. I use 9 Volt battery because a piezo buzzer that
I used works on voltages from 6 to 9 volt. At a voltage 9 Volts, piezo buzzer
may be ringing very loudly.
For more detail, please watch this video and don’t forget to
leave your comment. Thank you for visiting my blog.
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.
This time I tried to post something about Lime Battery. First
I was curious and then I bought some lime in a shop in the market complex. The
price is cheap Rp 1000 each piece. Then I use a copper and nails which
previously used to arrange a potato battery.
Finally, the results are surprising. 4 pieces potato
and 4 Cups salt water usually only
produces a voltage about 2.8 volts. But the 4 pieces of lemon can produce voltages up
to 4 volts.
One thing I don’t understand is, when the battery is loaded
LED, a third type of battery voltage drop to around 1.8 Volt.
In the previous post, I tried to make the battery from salt
water, I just practice one of the many articles on the internet. This time I
tried to practice something else, that is a battery of potatoes.
One evening I went to the market and buy some potatoes,
first I bought just to boil and eat it. Somehow after seeing a YouTube video
and some internet articles, I became interested to make battery from potatoes.
I took some copper wires in warehouse, then I took a few
nails made of aluminum. Of course, the copper cable is used as the positive
pole and nail as the negative pole. This is a picture of copper and nails that
I use.
One potato produce 0.7 volts, so if 4 pieces of potato are
arranged in series will produce 2.8 volts, this value is enough to turn on the Red
LED lights. the measurement results are almost the same with the salt water
batteries on the previous post.
For more details, you can watch on this video.
Finally I’m so
hungry, and then I boil the potatoes in water heater…..ha..ha…ha…
