Summary of USB PORT RELAY CONTROL WITH ATMEL ATMEGA8
The project describes a 6-channel USB relay control unit using an Atmel Atmega8 microcontroller. It allows controlling relays via a USB interface, simulating an RS232 connection for easy computer communication through terminal software. The relay card supports switching up to 250V AC at 8A, and features 4 optocoupler-isolated inputs for monitoring. The system regulates 9-12V AC supply and can cascade multiple relay cards via SPI. It enables controlling various appliances remotely, including over the Internet with additional software.
Parts used in the USB Port Relay Control with Atmel Atmega8:
- Atmel Atmega8 Microcontroller
- 6-channel Relay modules (up to 250V AC, 8A)
- Optocouplers (for 4 isolated inputs)
- PCB circuit for 9-12V AC power regulation
- SPI connector
- USB interface circuitry
- RS232 interface simulation firmware
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 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 and RS232 connections
In fact, with the computer relay to control a simple inexpensive circuit there, but (the PC and the Device Control) these circuits turned the computer port to question his instantaneous even in the relays pull leaves microcontroller used in the system prevent this problem can only be undertaken
The relays switch max. 250V AC and have a switching current of 8A (depending on the relay used). In addition, can also use 4 inputs, which are isolated by optocouplers, are queried and monitored. The AVR simulates a USB RS 232 interface and so you can relay card can be easily addressed without problems via a terminal program or other software. The USB driver in the AVR firmware comes from the company objective development 6 Channel USB relay card to switch from various appliances, lamps or motors by a computer program via the USB interfaceThis can then using a web application even over the Internet. About the SPI connector would even be possible to relay card with other relay cards to cascade. The relay switch max. 250V AC and have a switching current of 8A (depending on set relay). Also you can also 4 inputs, the optocoupler are separated, queried and monitored. The AVR simulates a USB interface RS 232 thus can relay this card without problems on a terminal program or other software to be easy.
Source: https://320volt.com/en/atmel-atmega8-ile-usb-portundan-role-kart-kontrolu/ USB Relay Control schematic pcb Atmega8 source code files alternative link:usb-port-relay-control-with-atmel-atmega8.rar alternative link2
