Servo tester using ic 555

in this tutorial, I am going to show you how to make a simple servo tester using 555 ic

circuit diagram

components needed

• ic 555
• 10k variable resistor
• 10uf,.1uf capacitors
• 220k,10k,1k resistors
• 1n4148 diodes

working

The principle behind this project is that a 555 timer can be configured in “Astable multivibrator mode” and used to generate the signal for the Servo Motor to work. The servo motors with pulse width modulated signal usually with a frequency of 25-50Hz. The angle of the servo varies according to the ON time  period of the signal(i.e, duration of the pulse). Hence, different servos have a different angle of rotation with respect to pulse widths mentioned in there in the datasheet. For example, a pulse of 1 ms, moves the servo towards 0 degrees while a pulse of 2 ms would take it to 180 degrees.

The 555 timer in Astable mode provides an oscillating pulse as output which is switching between high and low states at a certain frequency and pulse width. In Astable Mode the threshold pin and trigger pin of the timer are connected to each other which allows the output to toggle between high and low states. This can be analysed when we look at the internal structure of the 555 containing NPN transistors, and some voltage divider circuits,and flip-flops.

tv remote controlled home automation

in this tutorial, I am going to show you how to make simple home automation using tv remote

this circuit uses a TSOP1738 IR receiver module in normal condition, the output pin of the IR module is  High, which means the transistor  (bd140 PNP) is at logic Low. but when ir signal fall to tsop sensor the output of tsop goes low and transistor will turn on. the output of the transistor is connected to a toggle switch constructed with cd 4017 counter ic

circuit diagram

circuit diagram

componets needed

 

 

BC547B

Transistor BD140

1N4007

1K resistor

CD4017

TSOP

RELAY

100UF capacitor

how to make conductive paint at home

Conductive paint is an ink that results in a printed object which conducts electricity. It is typically created by infusing graphite or other conductive materials into ink.

Conductive inks can be a more economical way to lay down a modern conductive traces when compared to traditional industrial standards such as etching copper from copper-plated substrates to form the same conductive traces on relevant substrates, as printing is a purely additive process producing little to no waste streams which then have to be recovered or treated.

how to make 2 channel relay module

circuit diagram

completed module

how to make a super cheap power supply

in this blog i am going to make a easy and cheap powersupply
circuit daigram

HOW TO MAKE CONTACTLESS AC LINE DETECTOR

in this blog i am showing how to make a non contact ac line detector

we can use this device to detect the faults in ac line
components
1.3*2n3906 transistors
2.led
3.resisters 1megaohm and 100kiloohm
4.9v volt battery and its clip
5.dot board
CIRCUIT DIAGRAM

VIDEO

HOW TO MAKE AUTOMATIC EMERGENCY LAMP

Hello Friends

In this blog  i am going to show you how to make a  automatic emergency lamp

for this we use a dark sensor circuit using LDR

Basically a darkness sensor circuit turn on a light in darkness and turn off light in brightness.



COMPONENTS

1.LDR

LDR is a  variable resistor

The resistance of a ldr decreases with increasing incident light intensity

2.transistors

2n3906,bd139

3.10k resistor

4.3.7 li.ion battery

5.tp4056 li.ion charging module

6.led strip

CIRCUIT DIAGRAM

how to make a desktop usb speaker amplifier

how to make a desktop speaker amplifier
in this  blog i am going to show to show you how to make a simple desktop speaker amplifier
it is based on lm386 amplifier ic

circuit diagram

how to make simple bluetooth/aux speaker

HOW TO MAKE A SIMPLE BLUETOOTH/AUX SPEAker

Published Sep 5th, 2018

Introduction: How to Make a Simple Bluetooth/aux Speak

hai friends

in this tutorial i am goiing to make a simple,cheap and awsome looking Bluetooth/aux speaker. its very easy to make.

this speaker is very light weight and portable.its powerfull 3w speaker gives decent bass and quality sound experiance and the best is its battery back

Step 2: Gathering the Parts

1.pam8403

2.bluetooth adapter

3.tp4056 charger module

4.aux port

5.3.7 volt battery

6.2*switches2*switches

7.3w speaker

Step 3: Circuit Diagram

Step 4: Connections

connect battery to pam module via switch,connect one channel of aux port to one channel to pam module,and to the same channel connect the output of blutooth receiver,connect battery to bluretooth through a switch.connect speaker at the output of the same channel of pam module

SEE VIDEO

note. i am not connected charger module

you can connect positive of battery to positive of module and negative to negative

Step 5: Case Making

you can make your case with your idea

i am going with cylindrical one.

this one is very simple.
i am using only a pvc pipe and two bottle caps

Step 6: Enjoy the Music

thanks

happy making

drop ur doubts and comments

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