switch • Tech Projects

A 10 Bit LED Digital Panel Meter With Auto Ranging Based On The ATMEGA8

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Downloads Download the AVRStudio assembly source for the program: M8DPM091109A.asm Download the AVRStudio hex file: M8DPM091109A.hex Find updates at www.projects.cappels.org Overview – A 10 bit digital panel meter for positive voltage only. – Input resistance: about 130k – Ranges: 0 to 10.20 volts and 0 to 102.3 volts. – Over range indication. This project came from friend named

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HF/VHF/UHF TEST OSCILLATOR using microcontroller USING ATMEGA

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Its built into a plastic project box with an aluminum cover (on the bottom). The controls are as follows: Large golden knob is coarse tuning, small black knob with a blue index stripe is fine tuning, the green LED is the power on indicator, the slide switch is the on/off switch. The small black knob

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Testing Device for DiSEqC-Switches using ATtiny13-20PI

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This is my first AVR-project on this page. The DiSEqC-Tester allows to test DiSEqC-switches that uses 1.0 or 1.1 protocols. (DiSEqC-Switches with 2.0 and 2.1 protocol have backwards compatibility with 1.0 & 1.1 respectively and also may be tested). The device every second sends a DiSEqC-message that makes switch a DiSEqC-switch. Four LEDs are intended

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Relais Board Using AT2313 Using Atmega

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Description This is a peripheral board with 4 relais, rated at 5A/250V each. The board has a ML10 output connector for connection with the AT2313 Project board. It has also 4 LED’s for indication which relais is switched on. Hardware The circuit is simple, it consists of no more then an ML10 connector, a ULN2803A, which contains eight

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Atmel AVR-firmware based universal USB-Interface using ATTiny2313

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Scanning the web on microcontroller based USB solutions, I stumbled over Objective Development’s freeware USB solution based on Atmel’s AVR architecture. I decided to build up their reference design PowerSwitch with an ATTiny2313 MCU. Since I never used AVR chips before, the first challenge was to set up a code development environment enabling me to modify the firmware to

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How to interface LED with AVR Microcontroller (ATmega16)

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ATmega16 has 32 I/O pins to communicate with external devices. Before interfacing with external devices, these pins must be cofigured as input or output pin. This article demonstrates the basic I/O operation of ATmega 16 using LEDs. All the four ports can be configured to read an input from some external device or to give output to

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AVR Dual RGB Matrix Driver Using Atmega

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Multiplexing LEDs can be tricky, but we’re working with RGB LEDs, so think of each RGB as three individual LEDs. For an 8 x 8 matrix, that is 192 total LEDs on a single matrix. Even though there are only 32 connection pins, it is still possible to individually control the color and brightness of

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USB PORT RELAY CONTROL WITH ATMEL ATMEGA8

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6 relay control units can be made via the usb port usb drive computer program code and schema files are pcb circuit to regulate the supply 9-12 volt ac section there on the SPI… Electronics Projects, USB Port Relay Control with Atmel Atmega8 “atmega8 projects, avr project, microcontroller projects, “ 6 relay control units can be made via the

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Instructables Hit Counter (ESP8266-01) Using Atmega

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Some time ago, I tried to make an “Instructables Hit Counter” using the Instructables API, and an Arduino Uno with a wired network shield. However, with the limited RAM of the Arduino Uno, I was unable to get the system to work. A while ago, I noticed

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MQTT and Wifi Powered Mailbox Flag Using Atmega

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Note: updated with new firmware, a schematic and a tips for a programmer. A couple of years I embarked on my own home automation project. It started off by building a server controlled 433 MHz transmitter build with an Arduino to switch lots of

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