Vacuum Tubes Valves
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AC to DC & DC to DC
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Data Bus Circuits
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8051 / 8052
PCB CAD Software
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H Bridge Circuit
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
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4 Band Resistor
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AVR Microcontroller Circuits
AVR Microcontroller Circuits
Simplest and low cost USB AVR
This is the low cost AVR programmer using attiny2313. The schematic diagram is given below. First setup the circuit as shown. One important care taken to make fuse bit avrdude -c usbasp -p t2313 -U hfuse:w:0xdf:m -U lfuse:w:0xef:m If you use serial port to write the program , use stk200 command instead of usbasp.
How to use SPI (Serial Peripheral Interface) in AVR Microcontrollers
SPI stands for Serial Peripheral Interface and it is the simplest among all the communication protocols. 8bit data registers in the devices are connected by wires. These data registers works as shift registers and one of the device controls the data exchange inside the SPI Network. The device or devices that controls the operation inside the netwo
How to add 32K crystal/clock source to AVR Microcontroller (ATmega8)
This article explains how to add 32K external crystal/clock source to Atmel AVR micro controller Atmega8 with circuit diagram & C program..
ATMEGA32 8-bit AVR Microcontroller with 32K Bytes In-System Programmable Flash
This article describes the Gadgets Gizmos and Arduino (ATMega328). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components: ATMega328. A Geek How-To, . Circuit Kit: Overview In order to raise awarenes
In System Programming (ISP) for ATMEL chips
ISP is a way to serially program your microcontroller, while it resides in its place, in other words, without removing the chip from your board. Whether you`re just starting in the ATMEL microcontrollers, or you`re familiar with it, ISP (In System Programming) will provide you a simple and affordable home made solution to program and debug your...
ds1820 interfacing with avr primer
The circuit shows how to interface the ds1820 to microcontroller. As you can see the first pin is connected to GND, the third pin is connected to VCC & the second pin is connected to the Microcontroller. So when the temperature is sensing, it give the sensor reading to controller. We now want to read the temperature in AVR Primer Board from...
keypad interfacing with avr slicker
spi eeprom interfacing with avr slicker
Arduino AVR High-Voltage Serial Programmer
This Arduino sketch is useful for rescuing ATtiny microcontrollers rendered useless by incorrect fuse settings. It does this by putting the bricked tiny into high-voltage serial programming mode and writingthe fuses to safe values. The Arduino is connected to the tiny though 1k resistors and a 2N3904 transistor is used to switch 12 volts applied t
AVR Microcontrollers in Linux
A microcontroller is a single-chip computer. It has internal RAM, ROM, timers, counters, interrupt circuitry, I/O ports, analog comparators, serial USARTs, analog to digital converters, watchdog timers, and a RISC architecture. When you are using a microprocessor, you cannot program it alone. You need other components, like RAM, ROM, timers, etc.
Beginners Guide AVR Programming
You will get this done in 30 min. Step 1: Parts 1. 1 X any type of circuit board 2. 1 X Atmel AVR Atmega16 microcontroller 3. 8 X 330 ohms Resistors 4.
avr What is the point of Buffers like this in Programmers
On the bottom you will see a 74AC125 which is a Quad Buffer with Tri-State Outputs. I`ve seen quite a few buffers like this on programmers. but im not exactly sure what they do Im assuming whatever "CTL" is controls the "state" of the buffers. but what exactly is the point Why can`t you wire it directly to whatever Port Line (Serial or w/e). Or...
avr Programming an ATmega1284p with Arduino IDE and internal RC Oscillator
Program an ATmega1284p with my AVR Dragon and the Arduino IDE. So far I have installed mighty1284p, after writing my sketch. I compile it using the Arduino IDE and then cd into the (temporary) directory the sketch is build in. It contains the. hex file, as seems logic. /* Blink Turns on an LED on for one second, then offfor one second,...
40 pin avr development board
Prototype board for 40 pin Atmel ATMega microcontrollers with power supply circuit, 8MHz crystal oscillator circuit, RS232 port, reset IC, status LED, and 10 pin STK ICSP port.FR-4, 1.5 ..
avr 4 bit lcd interfacing tutorial
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. Following photograph shows programmer I have made for 40Pin and 20Pin AVR µCs. MISO, MOSI, SCK,
interafce 16x2 lcd with avr
LCD comes in various configurations and the most popular one is 16x2 matrix display. This article shows the interfacing of ATmega16 with LCD by displaying a simple character on the LCD. In this project LCD is working in 8-bit mode i. e. , the data transferred to the LCD must be in 8-bit data form. The PortA of ATmega16 is connected to data pins...
Bruco Integrated Circuits B.V. >> Case: Automotive alternator voltage regulator - Bruco..
Tutorial on using ADC (Analog to Digital converter) unit of AVR micro controller
A simple tutorial on using ADC (Analog to Digital converter) unit of AVR micro controller illustrated using Atmega8 with circuit diagram & codes..
How to work with External Interrupts in AVR micro controller (Atmega8)
A demo of external interrupts in AVR (Atmega8) micro controller with circuit diagram and C code/program as ISR (interrupt service routine)..
RS485 Library for Windows and Atmel AVR 8-Bit
This project implements a half-duplex, master/slave communications protocol based on RS-485 bus hardware. A Windows PC plays the role of bus-master and several Atmel 8-bit AVRs assume the role of bus-slaves. The Windows part is written in C+, the ninth data bit is simulated by the parity bit, the transceiver direction is switched by the RTS line.
Ponyprog Circuit for AVR & PIC16F84s
atmega 32a programming
A cellphone operated robot and i`m stuck with Atmega32A microcontroller programming. As software you can use then AVR STUDIO 4. Unter the Tools you can find the Menu "Programm theAVR" Chose there your used Programmer and you can setup and Programm your controller. the loading firmware is free. the chip ATMEGA8L is sold below 100/- usb socket and...
Assemble the AVR Tiny MIcrocontroller Circuit
Wire the circuit diagram shown here on a bread board. The choice of V type of AVR is important. For example Tiny13V is very appropriate for such an ex..
lf352 Programming the AVR microcontroller with GCC libc 1.0.4
The AVR 8-Bit RISC microcontroller from Atmel is a very common microcontroller. This microcontroller is one chip with EEPROM, Ram, Analog to Digital converter, a lot of digital input and output lines, timers, UART for RS 232 communication and many other things. I wrote already in March 2002 an article about the same subject. A lot of things have c
buzzer interfacing with avr slicker
i2c eeprom interfacing with avr primer
i2c eeprom interfacing with avr slicker
PCB exposure box Based on ATmega8 AVR microcontroller
I describe the procedure I followed to build the Box, the Lamp System and the Countdown System which is based on the AVR mega8 microcontroller. Four blacklight lamps, 15W each, emit radiation at the region of UVA, with a peak around 350nm where the thin surface above the copper of the photosensitive board, is. sensitive. The lamps are taken by...
Atmel AT89C2051 hardware keylogers
Atmel On the PC keyboard PS 2 AT89C2051 keylogers circuit connection cable connects to the circuit between what is written in the wake of the program running.
i2c interface to usb interface using attiny45 microcontroller
Attach any I2C client chip (thermo sensors, AD converter, displays, relais driver, to your PC via USB quick, easy and cheap! Drivers for Linux, Windows.
Ponyprog Circuit for ATMEL AVR
The ATMEL AVR programmer works with the Windows program ""Ponyprog"" which works under 95, 98, XP.
Arduino Projects and Circuits
PIC 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