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AVR Web Server

Low Cost – Low Power

AVR Web Server
AVR Web Server

Some nifty design work resulted in a small web server with some Ports that allowed the author to control and select analogue inputs. The original concept was improved by designing a host of hardware and software add-ons. Next came a PCB with ‘only’ two sides for a hook-up that linked it up to the Internet using an old NE2000-compatible Ethernet card.

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Materials

Component list

Resistors

R1,R2,R4 = 1k?8

R3, R10 = 10k

R5,R6,R7 = 3k?6

R8, R9, R11, R12 = 470

Capacitors

C1,C2 = 22pF, ceramic

C3-C10, C13 = 100nF foil dielectric, 5mm pitch

C11,C12 = 22µF 16V, tantalum

Semiconductors

IC1* = ATmega32 or ATmega644, DIL 40

ATmega644, programmed, order code 060257-41 from Elektor SHOP

IC2 = MASX232

N1 = 7805

D1,D2 = 1N4148

D3 = 1N4001

LED1 = LED, green

LED1 = LED, red

Miscellaneous

Q1* = 14.7456MHz quartz crystal

S1 = 14-way boxheader

X1* = 2x31-way Slot (reichelt.de) or ISA Slot

X2 = 9-way sub-D socket, PCB mount

Prog = 10-way boxheader with 6-way (2x3) pinheader

SD* = 14-way DIL pinheader

40-way IC socket

16-way IC socket

PCB, ref 060257-1 from Elektor SHOP

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