Top Circuits Page 141
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The LM35 series that is used in this project is a precision centigrade temperature sensor, which has an analog output voltage. It has a range of -55 C to +150 C and an accuracy of ±0. 5 C. The output voltage is 10mV/ C. The output voltage is converted by the....
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This is an early test program (assembly source code), which was stored on the erasable programmable memory chip (EEPROM). Assembler programming is just 1 step above programming at the binary level...
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Following circuit diagram shows ultra simple AVR microcontroller (SOURCE: unkown). It requires very few components and its very simple to build on general purpose matrix PCB. You can use PonyProg2000 software to program your AVR using this programmer.....
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AVRDude is excellent program for burning hex code into microcontroller. USBasp is awesome USB based programmer for the AVR. In this tutorial we will see how to use AVRdude for burning hex files into AVR microcontroller using USBasp. AVRdude is not readily....
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Interface an LED with AVR (ATMega16). Here I am using only one AVR microcontroller ATMega16, one register(10K), one capacitor(16uF/25v), One push button switch, Led BAR Green in stead of 8 led`s, power supply of +5v and -5v. Make the circuit as in diagram.....
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Build primarily as proof of concept and because I found the challenge interresting, this little unit is able to send an ascii string terminated with a CR/LF via a RS232 connection. It`s emulating the transmission of a barcode and can be used with any kind of....
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The block diagram below shows how the removable memory card or MMC card connection to other corresponding components. Since the memory card has two signal function operations, the SD mode and SPI mode, the SD mode indicates that all pins of the memory card....
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This device just sends data about the state of our office to Twitter (mainly because it`s just slightly more relevant than sending the same information about my house). It does however have potential relevance to more biodiversity themed activities,....
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This is a simple yet effective darkness activator. It uses an LDR to detect the light and when no light is present, it will sound an alarm from a cheap 8Ohm speaker. This circuit can be easily converted to a light detector by simply adding an inverting....
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Model railway running under computer control using the laptop to send commands over the USB port to the Arduino, which then does PWM to control the speed of the train. There were a few hiccups along the way not least of which the Arduino crashed repeatedly....
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The right leg driver circuit is where many amplifier board circuits common signals are summed and inverted though the Right Leg Driver circuit & sent back to the body to cancil out common voltages. This ground point could be a ear lobe. Their also is a 3....
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Input voltage from aerial voltage DC DC advocate is 12V AC at 800mA accepted and again adapted to DC through a arch rectifier Diode 1A. The voltage achievement of advocate ambit can be adapted in the ambit of 0-1000V DC. This aerial voltage DC DC advocate....
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I`ve re-drawn it to appearance the Colpitts oscillator added clearly. L is about 1. 5 uH; 19 turns in a T50-6 amount (yellow). The amount of C6 is begin experimentally. I acclimated 69 pF (a 47 pF and 22 pF in parallel). Added about this during check-out. L....
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The stoboscope tube needs about 250-400V DC to operate. This aerial voltage is generated application simple voltage footfall up ambit congenital from transistors Q1, Q2 and agent T1. This ambit gives out about 230V AC voltage which is again rectified with....
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This is a programmable alarm timer ambit that uses alone LEDs to announce hours and minutes. 12 LEDs can be abiding in a amphitheater to represent the 12 hours of a alarm face and an added 12 LEDs can be abiding in an alien amphitheater to announce 5 minute....
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The ambit works abundant like the aboriginal Strobos. except that a beaming tube is used. Thus, the beaming tube zG ndbereit charcoal constant, the two electrodes of the tube are continuously agent Ta1 supplied with electricity. This accepted makes the two....
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This ambit is of an 2x 2, 500W RMS stereo amplifier, super-light and after switching-mode ability supply. The ambit aloof shows a channel, and the ability accumulation that it assists to the two channels. The audio ambit should be duplicated, but the ability....
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The amount 1. is a block diagram for agenda alarm and agenda thermometer. It consists of 1 temperature sensor, RTC, Microcontroller(PIC), about-face annals, 7-segment and key board. The about-face annals use for aggrandize I/O of CPU becuase it has 13 I/O....
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This project is inspired by the DPRG IRPROX project. They have a pretty good PCB layout and idea. I would like to thank them for posting their project for all of us to see and learn from, I wouldn`t have started PIC programming without them, or at least not....
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This is a simple ambit which I congenital to one of my audio amplifier projects to ascendancy the apostle achievement relay. The purpose of this ambit is to ascendancy the broadcast which turns on the apostle achievement broadcast in the audio amplifier. The....
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When you ability accept apparent abounding videos about you tube assuming off crazy LED cubes, basic 3-D structures etc. But haven`t acquisition annihilation that explains how this is actuality done. Well analytic over internet i begin this abundant activity....
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The simplest of all motor controllers (besides a beeline on/off switch) is the contactor controller. I advised this contactor ambassador for use in my electric scooter project. It is based about three 12V relays, two 12V batteries, two switches and of....
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Consult Sensirion`s entire Datasheet Differential Pressure Sensor SDP1000/2000 catalogue on DirectIndustry. Page: 7/10....
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The circuit uses LM35 as its temperature sensor, and displays the temperature (0-99 Celsius) using the two 7 segment display. The circuit is also programmed to turn on devices using the RC pins. Example: RC0 is ON when the temperature is above 39 Celsius.....
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The aim of this project is to create a setup to capture the image of a falling object or any object in motion at a precise time using a DSLR and Arduino microcontroller. It can be done in many different ways, but the method I tried is illustrated below.....
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The input stage is the most critical for common-mode rejection and noise. We used a Burr-Brown INA121 differential amplifier, set to a gain of 10. The input stage is DC coupled. With a 9-volt supply, a differential DC offset of up to about a volt is....
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In a traditional microstepping motor controller, many parallel outputs of a microcontroller are used which are then converted to analog signals using a DAC and fed through a power amplifier to the motor coils. This approach is inefficient both in terms of....
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The principle is that the resistance of metals increases at higher temperatures and a heated wire suspended in a gas will lose heat by conduction and convection in proportion to the number of gas molecules present; the heat loss is thus proportinal to....
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Ralph Stirling, KC3F, and I built the first generation using a Texas Instruments C5X DSK digital signal processing starter kit. Let it suffice to say that the second generation is a tremendous improvement over the first, because it uses a much more suitable....
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All you have to do is insert the pieces so that things that should connect are on the same lane. To make things even easier, you can break lanes, or join lanes with a wire link. Right, this brings me to the meat of this post. How can we automate this, to get....
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If the TV receiver in question does not have a video input and its owner is reluctant to vandalise it in order to fit one then this sort of modulator is the obvious solution. It is a simple circuit that processesvideo signals to enable them to be fed....
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This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load. The upper limit of the ambient temperature is the maximum temperature that can....
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This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software....
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This part of my site features a stereo decoder circuit suitable for both my pulse counting FM Receivers and other types of FM Tuner, such as the old valve type that incorporates a Foster Seeley or Ratio Detector. This particular stereo decoder IC, MC1310P....
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This part of my site features construction details of a transistor VHF radio I managed to build using circuits as the building blocks, Compiled from some of my old radio magazines and books. Although this site is titled as a valve radio site I have decided....
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found the current in both the loops using Kirchhoff`s Voltage law but then I`m confused on the proper method to find the potential drop between the two loops. I suggest you insert two extra points A and B on both ends of the battery (on the bottom right of....
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Simulate the electric field within a gas filled discharge gap generated by a radio frequency voltage generator. The circuit, provided to me by the experimenters somewhat far away, is given in the second picture below. (Numerical values: $C1 = 22 nF=2. 2cdot....
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Building a Competition Buzzer Set, described the construction of a contest buzzer set. Additional reference material and parts are available, as described below: A kit includes an etched, undrilled printed circuit board, a programmed PLD, a 556 timer,....
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For one thing the Krohn-Hite 5100A VCO takes Zero to -17 VDC to drive the VCO output frequency. But the O-Scope X-axis wants 0 to +5. 7 volts to have the X-axis represent increasing frequency to the right. So, the O-Scope frame had to float to get -Volts....
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To swap charge in either direction between unevenly loaded positive and negative battery buses, you need an inverting dc transformer. One implementation is the symmetrical flyback converter shown in Figure 1. The circuit can generate a negative output from a....
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Cheap PIC controlled Helmet Camera using Sony LANC (Good for Extreme Sports) This Instructable will show you how to make a cheap Helmet Camera which can be....
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Cheap PIC Programmer This programmer works only with PIC16F84 but it`s great because it never causes errors and works with almost all computers,unlike some....
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Use a PIC Microcontroller to Control a Hobby Servo This instructable describes how to integrate hobby servos (the kind used in RC planes, cars, etc.) into....
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If you do not have EAGLE, you can download a full working version from CadSoftUSA Here is a zip file with the EAGLE schematics an....
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DTMF Touch Tone Decoder Using Microchip PIC Microprocessor This project contains the details of using a Microchip PIC12F683 8 bit microprocessor to detect....
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GTP USB PIC PROGRAMMER (Open Source) This work includes, GTP USB (not plus or lite) . The schematic, photos and PCB have been developed by PICMASTERS based....
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Heavy duty portable charger for usb devices (phones, iPad, etc.) Ever needed to charge your phone on the go? Can`t find a wall socket to charge your iPod?....
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This post provides the implementation of free running counter ( using c language ) for PIC16F84A micro-controller. This code is written in such a way that,....
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This post provides a simple method to interface any keypad (e-g 4x4 or 4x3 etc) with PIC12F675 microcontroller. The code for PIC12F675 is written in C lang....
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This PIC microcontroller tutorial provides a simple method to interface any keypad (e-g 4x4 or 4x3 etc) with PIC16F877 microcontroller. This code is writte....
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How to make a Clap-Clap on / Clap-Clap Off switch circuit! Hi all! This instructable not only gives the reader the information needed to create a clap-clap....
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Large Dancing Robot Build a large dancing robot. This was supposed to be a walking robot, but it more kinda beebopped around. video on last step. Build a P....
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1. Spectrum-analyzer project 2007 update Since the development of the wide-band VCO almost 10 years ago, the whole spectrum-analyzer project with all relat....
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Those days when I come home at night and strait into the darkness are finally over. This is a very practical device and I built it so that it is a module t....
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LED message system on a Strida folding bicycle wheel After I`ve bought my strida folding bicycle, one of the first things I`ve done was to check out instru....
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Design Goal: The JavaBot1 is a small line following robot designed to follow a black line drawn on a dry erase board. It is designed to follow very tight c....
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Microdot - wrist watch LED pattern timepiece Another RGB Sunset Productions production! This project is a circuit board for making a wrist watch size versi....
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This is a project that I started back late 2003 when I just starting to learn PIC programming. I wanted to building something that actually did somthing us....
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Introduction It`s time for 8-pin microcontroller Microchip PIC12C508, the SAVER V3.2, my latest design of a device that turns a night light on and off ever....
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NOPPP is a simple programmer for PIC16C84, PIC16F83, and PIC16F84(A) microcontrollers. It attaches to the parallel port of a PC. Plans were published in El....
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PIC development/testing board Here`s a PCB design for a bare bones PIC16F877 development board. All you need is a 4mhz crystal, two 22pf caps, one 4.7k res....
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This project makes a PIC microcontroller play audio PCM sounds using PWM modulation! Pulse-code modulation (PCM) is a digital representation of....
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This post provides the LCD interfacing code using PIC16F84A microcontroller. This code is written in C language using MPLAB with HI-TECH C compiler. You ca....
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This PIC16F877 microcontroller tutorial answers the question, "" How to implement a controllable digital clock using PIC16F877 ? "" Using PIC16 simulator (Pr....
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This PIC16F877 microcontroller tutorial answers the question, "" How to implement a digital clock using PIC16F877 ? "" Using PIC16 simulator (Proteus) you ca....
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This PIC microcontroller tutorial provides a simple calculator implementation for PIC16F877 microcontroller. This is a simple one digit calculator which im....
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This post answers the question, ""How to capture a pulse to generate an interrupt in PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this....
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This PIC16F877 microcontroller tutorial answers the question, ""How to interface LCD in 4bit mode with PIC16F877"" ? Also, using PIC16 simulator (Proteus) y....
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This post answers the question, ""How to make a pulse width modulator using PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this PWM code....
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This PIC16F877 microcontroller tutorial answers the question, "" How to use timer0 of PIC16F877 and how to handle its interrupts? "" Using PIC16 simulator (P....
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This post answers the question, ""How to use interrupt based UART in PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this UART code and ch....
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This PIC16F877 microcontroller tutorial answers the question, "" How to implement a up down counter using PIC16F877 ? "" Using PIC16 simulator (Proteus) you....
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The device used for measuring daily insolation has been developed. The device was built with a PIC18F458 and the 128MB Multimedia Memory Card, MMC. The sol....
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PICkit 2 Introduction: There are many PIC programmer available, commercial and DIY devices. As Microchip introduces the new microprocessors the prog....
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PicLink RS232 low cost development controller with ADC PICLink RS232 Embedded Controller The PICLink RS232 controller module affords any microcontroller en....
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PicPOV is a project based on ""persistence of vision"". A PIC microcontroller blinks 8 LEDs on and off so that when waved through the air, a mes....
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Quick Key Adapter, 10 Button HID Keyboard This Instructable covers creating a USB connected Human Interface Device Keyboard that has 10 button inputs which....
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RF is just way too cool not to use in your designs. But if you`re a newbie like me it is difficult to successfully build solid RF transmitters and receiver....
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A very popular type of LED that has finally come about is the tri-color, RGB LED. The RGB stands for: red, green and blue since the LED is capable of displ....
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Schaer is a generic programmer circuit capable of uploading and downloading firmware to/from several electronic devices like microcontrollers a....
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Since I finished my degree in April, I have been looking for work. The search has been slow but hopefully soon I will be making the big bucks. To fill my s....