DIY KIT 5- 3 LEDs Cycle Flashing Light DIY Kit

This is a simple blinker/flasher DIY kit with 3 LEDs, 3 transistors, 3 capacitors, and few resistors. This is a very basic and easy electronic kit for beginners. It takes about 15 minutes to build the kit. It works with a 3V-5V power supply. The video shows all the assembly steps.

See all the assembly images on Flickr

View all the good images of this kit at Flickr

 

 

DIY KIT 4- Tetris, Snake, Plane, and Racing Game DIY Electronic kit

I recently built a DIY electronic game kit. It has 4 games: tetris, snake, plane and racing.

This is the fanciest electronics DIY kit in our catalog. A do-it-yourself arcade video game! The 8 x 16 dot matrix display is of course not up-to-date, in the age of 4k UHD. But it is a lot of fun to build this little gaming console and to play classics like Snake or Tetris on it. (more…)

DIY Kit 3- Heart Shaped LED flasher DIY kit with LDR

It is a simple LDR based ‘Happy Birthday To You’ music player. When you block the light falling on the LDR, the kit stops playing the music.

There are 18 flashing LEDs and the buzzer plays “Happy Birthday to You” song.  A photoresistor or LDR works here as the photosensitive element. The jumpers are used for bright trigger or dark trigger setting- two modes of operation and another set of the jumper is used to set the buzzer in mute state.

Two trigger mode applications example:
Bright trigger modes: The circuit gets trigged in the bright light.
Dark trigger mode: The circuit gets triggered in darkness.

A transistor has been used as an amplifier for amplifying the music.
Watch the video below. You can watch similar DIY kits videos at www.kitstv.com.

View all the assembly images on Flickr.

Preamplifier for electret microphone with LM358 opamp

It’s a simple project to build a stereo preamplifier using electret microphones and the cheap operational amplifier LM358. In the past, we have made few projects comprising LM358, you can check them here

This project uses the dual-channel operational amplifier LM358. Each channel is used to increase the signal of one electret microphone and it helps to manage a stereo output.

To build this project you will need:

  • LM358 x 1
  • Electret Microphones x 2
  • Resistors 10K x 8
  • Resistors 47K x 2
  • Electrolytic Capacitor 10uf x 2
  • Electrolytic Capacitor 220uf x 2 (or 10uf x2  depending on noise)
  • 2 pin Header x 2 (or minijack or any connector you want)
  • 1 Stereo minijack (3.5) female connector (the output connector)
  • Battery Holder (you can use any power supply between 5V and 32V. We have used a 6V power supply.

This project is based on a tutorial published at Fritzing and we are sharing this under creative commons license.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

Fully assembled clap switch for 100-220V AC light bulbs

DIY CLAP SWITCH

This fully assembled sound/clap operated switch can be used for turning on your 100-240V AC light bulbs. Usually, we use a clap switch to operate a lamp and it can easily do that for you. The kit responses to clap up to distance of 5 meters, but, the further you go, the louder the clap should be.  (more…)

How to use the fully assembled clap switch

DIY CLAP SWITCH

We are now selling fully assembled CLAP SWITCH(shipped from Sydney, Australia). Click here to visit the product page. 

If you have come to this page from a search engine, we recommend you to visit the page about DIY clap switch. In this article, we are going to describe how you can use the “do-it-yourself(DIY) clap switch” to light up 100-240V appliances. When we say 100-240V appliance used with a clap switch, it is usually a bulb/lamp/CFL(Compact Fluorescent Lamp) tube. This article is for absolute beginners, so, we will try to explain all the small details. (more…)

How to use C51 4 Bits Digital Electronic Clock DIY Kit

This is a very popular digital click for beginners. It is a DIY Kit. It is now available at BuildCircuit Store. It is based on AT89C2051-24PU.

Basic Functions:

1. Hour and minute display & minute and second display

2. Two alarms set up

There is a buzzer that works as an alarm. When the clock reaches hours…like 1:00, 12:00, etc., it will beep for 3 times. The alarm beep is optional, you can disable it.

(more…)

Dark sensor on breadboard

The circuit is ready for testing. Connect battery terminals and see the output. As you block light falling on LDR(Light dependent resistor), the LED glows.

OUTPUT:

[youtube]http://www.youtube.com/watch?v=qmWAgoHwy3w[/youtube]

THIS CIRCUIT IS EXTREMELY SENSITIVE TO DARKNESS. EXPERIMENT THE CIRCUIT IN A HIGHLY ILLUMINATED ROOM.

LED GLOWS EVEN IN LESS DARKNESS. Use torch light if the LED glows in less darkness. You can adjust the sensitivity of the circuit using a variable resistor in place of R3-300Ohm. Try this circuit with other resistances as well, for example, 1K, 10K and 100K, etc.

Digital object counter DIY kit

We are now selling CD4026 and CD4029 up and down counter modules.

This kit is based on my previous tutorial on ‘digital object counter‘. I had published the tutorial under ‘minibread’ category. Please check the tutorial. 

IMG_0673

Digital object counter

In that tutorial, you can see that there is only one seven segment display and there is no reset switch. Well, that was extremely basic circuit.

What’s new?

Digital object counter

My new DIY digital object counter works with TSOP4838 infrared receiver   and there are two seven segment displays displaying numbers from 0 to 99.   An IR transmitter is oriented towards the TSOP4838 infrared receiver of counter module and objects are moved between the counter and transmitter modules. Each time an object passes between the two modules, the seven segment displays show increment in numbers. The counter module can be reset to 0 at any time and restart the counting.

Watch the video below:

The counter can be reset to 0 by pressing the reset switch(see on video). The counter stops counting if the IR rays is continuously falling on the IR sensor. As soon as an object obstructs the IR signal, the counter immediately counts the interruption.

The distance between the counter module and the IR transmitter should be around 1 meter.

The module can also be tested with general remote control. Thus, you can also call it as a simple remote tester. For each press on your remote control, there is increment in number.

Power supply: The counter works with a 9V battery and the IR transmitter works from 6V to 9V.

Counter operating with a remote control:

Schematic of counter module:

Counter

When TSOP4838 infrared receiver receives infrared signal, it triggers BC557 and switches on LED2. This trigger also charges the RC circuit network made up of C1(100uF), R3(1K) and R4(1K) and switches on the transistor BC547 for a few seconds. Transistor Q1 switches on the LED1 and gives clock signal to IC1(CD4026). For each clock, CD4026 drives the seven segment display and increases the numbers on the display.

Pin number 5 of IC1 is connected to pin 1 of IC2 for chaining the two CD4026 chips. For adding one more digit, the pin 5 of IC2 should be connected to pin 1 of IC3.

Schematic of IR transmitter module:

IR transmitter schematic

GO TO IR TRANSMITTER ASSEMBLY INSTRUCTIONS PAGE

IR transmitter is based on astable mode of 555 timer. The 555 timer, resistors and capacitor on the transmitter module output IR rays at 37.974Khz(approximately 38Khz). The TSOP4838 infrared module operates at 38KHz infrared frequency, however, that is not so strict with these kinds of basic experiments. It actually operates at frequencies between 30Khz to 40Khz.

Use astable mode frequency calculator for finding out the frequency of 555 timer. While using the online calculator, enter R1=18K, R2=10K and C1= 0.001uF, you will get 37.974 KHz.

How to use the kit

Place the two kits facing each other in a straight line. The IR receiver(on the counter module) and the IR LED(on the transmitter module) can be kept in a line of sight(straight line). When you move an object in between the two kits, the counter module counts the number of interruptions in the line of sight.

Behavior 1: When you place the IR receiver and the IR LED in a straight line, the two 3mm LEDs on the counter module are switched on and it counts as soon as there is an object in the line of sight.

Object counter

Behavior 2: When you place the IR receiver and the IR LED close to each other but not in a straight line, the two 3mm LEDs on the counter module are switched off and the counter counts as soon as an object moves away from the line of sight.

Slide2

Please watch the following video to be more clear:

Other related tutorials:


BC-3014A

3 Digit Digital Objects Counter With Laser Module

US $14.95US $19.95
This is 3 digits digital object counter kit

Check out all the counters

COU-18

1.8" Photoresistor And Laser Operated Medium Digital Objects Counter

US $24.95
This is an upgraded version of the previous
SCO-23

2.3" Common Anode Seven Segment Display Driver

US $19.95
COU-902

2.3" common cathode seven segment display driver

US $14.95US $19.95
This is a CD4026 based up counter driver

CD4026- 1 Digit Up Counter Module

US $4.95
  • It works as an UP counter. You can
Sold out
COU-23

Photoresistor And Laser Operated Large Digital Objects Counter With 2.3" Displays

US $29.95
A laser light module illuminates the photoresistor continuously

DIY Arduino Kit- How to Make your own Arduino UNO

Do-it-yourself-DIY-Arduino (3)

We are now selling BLUE colored DIY Arduino kit.  

You know that there are several versions of Arduino hardware. Hobbyists have also made Arduinos on strip boards giving different looks. Here’s one more Arduino, that is a simple do-it-yourself (DIY) kit. It is just like any other Arduino UNO board. However, it does not have FT232RL chip, therefore, you would need a separate FTDI basic module to burn your sketch.

This kit contains everything you need to build your very own Uno-compatible DIY Arduino board. Simply follow the Assembly Guide and after some basic soldering, you’ll have made a fully-functional Arduino-compatible development board. The included ATmega328 comes pre-loaded with the “Optiboot” bootloader so you don’t have to worry about loading the firmware, simply solder it together, connect an FTDI Basic and load your favorite sketch using the Arduino IDE.

After the board is assembled, it can be powered by an FTDI connection or a regulated 6-15VDC power supply connected to either the DC Barrel jack or the 2 pin screw terminal.

Note: You will need either an FTDI Basic or FTDI cable to load code using the Arduino IDE.

diy arduino

Kit Includes:

  • 1 x Arduino-Compatible plated through holes (PTH) Kit PCB
  • 1 x ATMega328 with Optiboot bootloader
  • 1 x L78L33 3.3V Voltage Regulator
  • 1 x 5mm Green LED
  • 1 x 5mm Red LED
  • 2 x 330Ohm Resistor
  • 1 x 10kOhm Resistor
  • 1 x 16MHz Crystal
  • 2 x 22pF Ceramic Capacitors
  • 5 x 0.1uF Ceramic Capacitors
  • 2 x 10uF Electrolytic Capacitors
  • 1 x LM7805 5V Regulator
  • 1 x Diode 1N4001
  • 1 x Resettable Fuse PTC (300mA)
  • 1 x 28-Pin DIP Socket (To seat your ATMega)
  • 1 x Push Button Reset Switch
  • 2 x 6-Pin Female Headers
  • 2 x 8-Pin Female Headers
  • 1 x 6-Pin Right Angle Header (To connect your FTDI Basic)
  • 1 x 0.1uF Capacitor
  • 1 x DC Barrel Jack
  • 1 x 2-pin screw terminal
  • 1 x 6 pin ICSP header

Assembly video tutorial: 

Documents:

You can purchase this kit from here:

BC-2138

Do-It-Yourself (DIY) Arduino- Make Your Own Arduino

US $14.95
This kit contains everything you need to build

Super Easy Electronics Projects for Absolute Beginners

There are hundreds of electronics projects published on buildcircuit.com. This time we have selected few projects that should be easier for beginners to start with. Complex and difficult projects just frustrate the beginners. The best thing about the listed projects is that all come with good assembly images and most of the projects can be made with 5-10 components.  The components used for one project can be used for other projects also.
(more…)

Remote operated musical bell

Remote operated musical bell can be made combining the following circuits.

a) Remote tester
b) Basic RC circuit
c) Simple Musical bell

When a remote is pressed, the circuit plays a music.

a) Remote tester

Do-it-yourself (DIY) clap switch for 100-220V AC appliances

DIY CLAP SWITCH

This do-it-yourself(DIY) sound/clap operated switch can be used for switching your 100-240V AC electrical appliances. Usually, we use a clap switch to operate a lamp and it can easily do that for you. The kit responses to clap up to distance of 10 meters, but, the further you go, the louder the clap should be.  (more…)

Audio amplifier using LM386

Description: The LM386 is an audio amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.

(more…)

How to assemble infrared transmitter for infrared receiver DIY kit

Click here to go to assembly page of infrared receiver.

You will get these components with infrared transmitter kit:

  • 1 x PCB
  • 1 x Earphone Jack female
  • 1 x Infrared LED
  • 1 x 100uF electrolytic capacitor
  • 1 x 4.7uF electrolytic capacitor
  • 1 x S8050 transistor
  • 1 x 5mm LED

  • 1 x 0.01uF ceramic capacitor- Code: 103
  • 1 x 100 Ohm resistor

 | | (equivalent representations) | |

  • 1 x 51K Ohm resitor

51k.gif

Stereo jack is not included in this kit. You will need to buy it separately.

These are the steps for assembling infrared transmitter kit.

Step 1: Solder 100 Ohm and 51K Ohm resistors.

This is 51K

51k.gif

This is 100 Ohm

 | | (equivalent representations) | |

Step 2: Solder ceramic capacitor marked as 103.

Step 3: Solder the transistor S8050 as shown on the image below

Step 4: Solder the 5mm RED LED. Be careful with the anode and cathode pins. Insert the right pin in the right hole.

Step 5: Solder the stereo connector as shown below:

Step 6: Solder 4.7uF electrolytic capacitor as shown on the image below.

Be careful with the polarity of the capacitor. Insert the negative (-) side of the capacitor in the hole marked as – and insert the other pin in the hole marked +.

Step 7: Solder 100uF electrolytic capacitor

Step 8: Solder a 6V-9V battery connector to the holes marked as IN+ and IN-. The black wire of battery connector should go to IN- and the red wire should go to IN+.

Step 9: Solder the TRANSPARENT LED- the infrared LED to the spot marked as – and +. The long pin(anode) should go to + hole and short pin(cathode) should go to – hole.

Battery connector and Infrared LED after assembly should look like as shown on the image below:

We have connected a 9V battery connector. You can also connect a 6V battery connector. It works for both.

Match your assembled kit with the shown below.

Use one end of your stereo jack to connect to your audio source, for example, mp3 player or mobile phone and the other end to the transmitter kit.

You can buy this kit at BuildCircuit Store

Related tutorials:

  1. How to assemble infrared receiver kit
  2. How to use infrared receiver and transmitter kit.

How to assemble a line following robot – Page 1

The assembly of a line following robot is pretty straight forward. If you follow the silkscreen labels, you will be able to assemble it easily.

The line following robot comes with the components as shown on the image.

Start with resistors

Solder all the resistors that comes with the package.

Solder the transistors S8550

Solder the 5mm red LED. Make sure that the Anode and Cathode go into the right holes.

 

Solder the 100uF capacitors.

Solder the variable resistor 10K ohm

Solder 8 pin DIL socket

Solder wires on robot motors

Peel off the sticker and stick the motors

After sticking the motors, the robot should like this:

Make sure that the motors are soldered on the PCB solder pad.

See the remaining part of this tutorial on the next page.

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