Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Arduino Projects and Circuits
Arduino Projects and Circuits
Arduino Vocal Effects Box Schematic
I`ve broken the schematic into three parts so it is easier to understand. The first schematic shows the audio out circuit. This project outputs audio..
Arduino Ultrasonic Sensor with LEDs and buzzer
Hi guys this is my first tutorial, I`ve just started a few months ago learning electronics (previously I`ve just knew how to program in C and Python)..
If your are like me which I am guessing you are, then ever since you got into doing stuff with arduino you have wanted to make your own arduino board..
Datalogging for Arduino
Here`s a handy Arduino shield: we`ve had a lot of people looking for a dedicated and well-designed data logging shield. We worked hard to engineer an inexpensive but well-rounded design. Not only is it easy to assemble and customize, it also comes with great documentation and libraries. You can get going within an hour - saving data to files on a
Monitoring water usage with Hall effect sensor and Arduino
This is a fairly simple schematic of the amplifier and filter. At the core of the circuit is an LM124 op-amp running in an inverting configuration. Th..
Arduino Controls an Infrared Helicopter
2N3904 is the NPN transistor. Looking at the flat face, the left lead is Emitter (pin 1 in schematic), the middle lead is Base (pin 2 in schematic), the right lead is Collector (pin 3 in schematic). Another end of 50 Ohm resistor to +5v pin on Arduino. (An alternative would be use a bigger resistor, say 100 Ohm, to replace the 50 Ohm one, and conn
Circuit Simulation through Arduino Processing Interface Circuit
The Arduino Internet Gizmo
The Arduino Internet Gizmo consists of an Arduino, a RFID card reader, a bunch of LEDs and other components mounted in a recycled PC power supply case..
Wii Nunchuck Arduino Spirit Level
Since I have read an article on todbot blog, I bought a couple of Wii Nunchucks from ebay. I don`t remember how much I paid for them, but it was much..
16 bit brain wave interface for ArduinoRaspberry Pi
Powerful for its size and cost, and extemely easy to learn and use. I spend a fair amount of time zipping around townon my scooter, and thought it would be cool to add a voltage monitor to warn when the battery might need recharging. Waiting until the electric starter no longer works is somehow lacking. So after an evening with an Arduino...
Arduino-Powered Jack-in-the-Box Toy
Arduino Whole House Telephone Intercom
ATMEL ARDUINO and CODEBLOCKS
Why would you want to use the Arduino library with another IDE It helps organize your code (especially for large projects), is easier to implement other code not written specifically for Arduino and can be a gateway to more powerful programming tools and techniques. There are many tutorials out there so this overview provides a overview with...
An Arduino Compatible Using CP2102
Arduino Tutorial Breadboards and LEDs
GPS datalogging shield for Arduino
This has been supplanted by the SD library built into the Arduino IDE. The only good thing about it is that it will (barely) fit and run into a `168 Arduino so if you happen to be stuck with a `168 and can`t upgrade, this code may be handy. Otherwise, please use the newer code above
Data-Logger Shield for Arduino
There is a small power supply on the board for generating 3. 3V @ 250mA. We don`t use the `built in` 3. 3v regulator on the Arduino because its only guaranteed up to 50mA and some SD card need a lot of power when writing. This supply is nice and steady, we can use it as an analog reference too! We have two sets of bypass caps to try and keep...
Display Text on an HD44780 LCD with an Arduino
To do this, first, we must make the appropriate physical connections from the arduino board to the LCD. Then after, we must write the code so that whatever text we want displayed comes up on the LCD. LCDs are pretty much the standard now in order to display text to users of a device. Almost all electronic devices which give a readout to users of s
Arduino Motion Detector Circuit
For example, once the motion sensor picks up motion, we can program the arduino to turn on an LED, turn on a motor so that it spins, sound a buzzer off, etc. In this circuit we are doing here, for simplicity, we will simply turn on an LED once the motion sensor detects motion. However, like explained before, you can customize the circuit to do any
Arduino Running A DC Motor and High Current Lamp
BC547 transistor. Max operating current is 100 mA while max voltage is 65 volts. With the transistorlabelfacing the reader, the three legs from left to right are collector, base and emitter. Note: I destroyed one BC547 transistor while setting this up. I tested the dc motor I used using digital multimeter, it wasgettingmax of 150 mA. An obvious mi
Arduino Turning The LED ON with a Push Button
Arduino CAN Bus Interface
Implementation of CAN for use in aircraft. The protocol is called CAN-FIX and is a part of the MakerPlane Open Source Airplane project. You can get more information on CAN-FIX here. The idea for this project is to build an Arduino shield that will let it communicate over the CAN bus. I had some Microchip MCP2515 and MCP2551 (CAN Controller and...
Arduino Flashy Christmas Lights Ornaments
This is the next part in our learning Arduino series, and this time we ll be learning about and using Arrays to make a little Christmas tree ornament with various flashing sequences. This would be an ideal project to keep the kids occupied if you`d like to teach them basic soldering - just mount the LEDs on a piece of card, and you can get power...
Arduino Traffic Light Controller
If you want to improve your Arduino programming, creating a traffic light controller is great practice..
Arduino Drive with PID Control
File exchange, MATLAB Answers, newsgroup access, Links, and Blogs for the MATLAB & Simulink user community..
Bidirectional motor control
One of the simplest ways to get a motor to turn in both directions is by using a double-pole, double-throw (DPDT) relay. Along with the relay, this hookup requires two transistors and two Stamp pins, one for on/off control and the other for direction control. The diagram below contains the schematic for this setup. The DPDT relay is switching...
motor switch led circuit
The strategy is to get the circuit going in stages, testing each part as you go. Once everything is wired correctly and can be either controlled or read by the computer correctly, then you can write the main program with confidence that all the pieces are working. Follow the directions shown in the Arduino Guide ( PDF file ) under the "Flashing an
4-Channel Thermocouple Input Arduino(TM) compatible Shields and Boards
This is a complete Arduino Uno-compatible standalone system, and will be fully assembled, tested, and programmed before shipping. You may choose one of several TC4 applications to be pre-programmed into the board. If you would like to use the TC4 system, but do not wish to purchase an Arduino board and then install and learn the Arduino progamming
Arduino Differential Controller
I experienced faulty DS18B20 reads on my tank thermometers, probably due to my heatshrink/silicone waterproofing method. It gave me a chance to improve my code to make the controller more tolerant of bad reads, but my tank thermometers have now been replaced with waterproofed DS18B20 probes, which are very cheap on ebay. it is NOT reccommended
NaV-1 Arduino Soundgin-Babblebot Synth
Fun with Arduino
The term Arduino actually refers to a system of components that include the board, the microcontroller, the boot-loader, and the programming environment. It is a system designed to `protect` the user from a lot of the complication that is part of microcontroller programming. At the heart of the Arduino board is a microcontroller called the ATMEGA3
PIC Microcontroller Circuits
AVR Microcontroller Circuits
Microcontroller Programmer Circuits
68HC11 Microcontroller Circuits
8051 / 8052 Microcontroller Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
CMOS Circuits Tutorial
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