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Coilgun 1

The definition of a coilgun, by default, is a gun which, with magnetic force, attracts a projectile towards the center of the coil and continues its trajectory in order to leave it. After learning more about the subject, I started to build one. Read the article

Coilgun 2

For the coilgun, I added about 200 feet of wire more so that there is a greater power. I added three AA batteries to make the charging faster and more efficient. In addition, I have added 2 capacitors of the same type as my other, that is to say 250V / 400uF. Read the article

Coilgun 4

Also, I added a 1/2 "(1.25 cm) PVC tube the same size as my projectile. Around this tube, I wound up the wire. My reel is about 1 inch (2.5 cm) wide and 1/2 inch (1.25 cm) thick. It has a resistance of 55 OHMS Read the article

Coilgun 5

I've added some new features that help its performance. First, I installed a Jack to recharge it with an external power. In this way, it can recharge much faster without discharging the battery. The external voltage can go... Read the article



Lux Meter

For this project I use an arduino. It's very simple to program and it works very well. These are not the true measure, but I relied on reliable internet data. Read the article

Automatic Curtain

My awning is equipped with a servo motor that allows it to go up and down without problems. I got the SM-S4309R servo motor available at futurlec.com (http://www.futurlec.com/Servo_Motor.shtml) This motor has a force of 8.7 Kg / cm. Read the article

Interactive Table

Instead of using a central microcontroller and using the Multiplexing technique, I decided to control my table with 25 microcontrollers. My table has 50 pixels and an Attiny85 controls 2 pixels. Read the article


PIC Microcontroller

4 Players Buzzer

My buzzer based on PIC16F84A looks very similar to my other buzzer, I added a 2.5 second time base. That is, when a player presses his buzzer, he can release it and there is a delay of 2.5 sec. Read the article

12 LEDs Chaser

The circuit is controlled by a PIC16F84A. It has very few components. Only one crystal with its 2 capacitors which serve as oscillator, 12 resistors and 12 LEDs. I have programmed the circuit so that there is 1 LED that lights for 100ms then it turns off. Read the article

Infrared Points Counter

My infrared meter is used to count points on a table football table. There are two sensors, a transmitter and a receiver. When the ball passes between the two sensors, the receiver sends a signal to the microcontroller which increases by 1 on the 7-segment... Read the article

Electronic Dice

The circuit is really simple to do. It requires a PIC16F84A with its crystal of 4 MHz and the two capacitors of 22 pF. It works with a common 7-segment cathode and seven 220 ohm resistors, one for each pin. Read the article

Illuminated sign with LEDs

A light sign is used to indicate different things using a clear word or message. Most of the time, companies use neon signs. In my case, I use LEDs. Read the article

Binary Clock

The binary clock can also be called geek clock, because just reading the time can be complicated. Indeed, this type of clock uses one of the most known languages. The binary code. So, instead of using numbers, we use 20 LEDs placed in a specific order. Read the article

Automatic light

My motion detector is the HC-SR501. The dome shaped like a soccer ball serves to have a wider view. With this dome the sensor can pick up movements at a distance of up to 5m! Which is well enough for a room in a house. Read the article

Automatic Light 2

Entering a room where it is dark requires turning on the light by operating a switch. Exiting the room requires turning off the light for the sake of economy by operating the switch. But what about an electronic system capable of spotting the entry of a person into a room, keeping the count of the number of entrants and outgoing? Read the article

Powerful power Inverter

An inverter is an electrical energy converter, which transforms a unidirectional current into a system of alternating currents. The objective of our realization is to construct an inverter which will make it possible to feed by means of a battery 12V of the apparatuses normally operating on the current of the sector. Read the article

Control panel

To control in real time the sensors of my workshop and its audio system, I installed a control panel that I propose you to discover. The microcontroller used for panel management is a PIC18F4455 with a 20 MHz oscillator. Read the article

USB PIC Programmer

It is based on a PIC18F2550. It is one of my most complex circuits. It contains several different components that have a particular meaning and do not change the value of the components because otherwise the computer will not be able to detect it. Read the article

Pulse Width Modulation (PWM)

It is often useful to be able to vary the voltage found at the output of a pin of a microcontroller. The technique used is Pulse Width Modulation (PWM). Read the article

Automatic Curtain

My automatic blind allows to raise and lower my curtain (blind) at scheduled times which can be modified using the LCD interface and two push buttons. It makes it possible to go up or down my blind at precise hours in order to make the house more autonomous. Read the article

144 LEDs Lighning Table 

My table includes 144 pixels. One pixel equals one LED. One pixel measures 5 cm by 5 cm. Thus, in the programming codes, each LED can be controlled one by one. In order to control the 144 LEDs, a special technique called Multiplexing. Read the article

Digital Tachometer

A tachometer is a device that allows to calculate the speed of a moving object like the speed of an engine for example. My tachometer has a 7-segment digital display which is controlled by a PIC microcontroller. Read the article

Ultrasonic Rangefinder

A rangefinder makes it possible to measure distances without contact. Ultrasound is one of the methods used in telemetry to perform this kind of task. Read the article

Digital thermometer

My digital thermometer aims to measure the ambient temperature and display it on LCD screen. Read the article

Digital Voltmeter

A voltmeter is a very useful instrument for any amateur of electronics since it makes it possible to measure the voltage at the terminals of a component or the terminals of a power source. To realize my voltmeter, I use the Analog / Digital converter (ADC) which is integrated into the PIC microcontroller. Read the article



AC to DC : Transform a AC voltage to a DC voltage
LM386 Amplifier : Pocket Amplifier based on LM386
Electrical arcs : 25 KV arcs with a microwave transformer
Power supply : Powerful all-purpose power supply
Variable Power supply : Fixed and variable power, all purpose, very powerful for main voltages
Tesla Coil (SGTC) : Allows to generate voltages of more than 80 000V
Buzzer : 2 or 4 players based on relays
USB Charger : USB charger for USB device 
K2000 Chaser : 6 round-trip LEDs with 555 and 4017
Serial Communication (RS-232/UART) : Experiment with asynchronous serial communication protocol.
Wireless controller : Control up to 12 circuits at 1 km distance
Wireless controller (Cellphone) : Controls an electrical system with an old mobile phone
ZVS Driver : High voltage and current from a low power source
Liquid detector : Operates a circuit when it detects a conductive liquid
Light detector : Activates a circuit when it detects light
EasyEDA : A new way to make printed circuit boards at low cost
High voltage Flyback generator : Produces about 8 kV
Function generator : Wave generator, of varied and variable shapes and frequencies.
Debounce switches : Hardware and software techniques to manage the rebound of the switches
Light dimmer : Varies the intensity of a 120V light bulb
Clap switch : Turns on the light with a 555 and 4017 hand clap
Joule Thief : Turns on an LED with only one 1.5V battery
Peltier module : Allows to generate cold!
Power Inverter : Allows to transform 12VDC into 120VAC
H-Bridge : Theory on the operation of the H-bridge to control a DC motor.
AVR Programmer without AVR : Requires no AVR and complex components
PIC Programmer without PIC : Requires no PIC and complex components
End-of-session project 1 : This project will allow you to create a stopwatch, a metronome and a clock / alarm.
End-of-session project 2 : Home automation system for controlling various appliances in a home.
End-of-session project 3 : Multifunction multimeter including generator, voltmeter etc.
End-of-session project 4 : A stand-alone vehicle with an Android app
Voltage Regulator : Regulator 5, 12, 15 V with 7805, 7812 and 7815
Sound through light : Send an audio signal through the light
Hot air reflow soldering : A simple technique for surface components with a hot air rifle
Stroboscope with 2N3904 : Most common stroboscope in electronics
LED Plate: Plate with different LEDs of colors and sizes
High precision synchronization : This synchronization is based on the frequency of the home power supply.
2 minutes timer : A LED lights after 2 minutes based on a 555
Sensitive keys : Create a pulse or operate a circuit with your finger
Wireless power transmission : Transmit current through 2 non-contact coils
VU meter : Create light effects from audio signals