About the article

Micro Webserver

control and regulation via the Internet

Micro Webserver
Remote measurement and control is possible via the Internet. Unfortunately, webservers usually sit in large, humming grey cabinets. That’s not the ideal solution for keeping an eye on your refrigerator, coffee machine or central heating system. The Elektor Electronics Micro Webserver provides an alternative. The Elektor Electronics Micro Webserver is a full-fledged node for Internet traffic, despite its quite modest dimensions and complexity. It consists of a microcontroller board with a network interface. Thanks to its compact construction and the versatility of the microcontroller board, the Micro Webserver is an ideal choice for measurement and control applications. Naturally, the fact that it can be read and operated from anywhere in the world via the Internet is a major bonus.Despite these unprecedented features, the necessary hardware is actually minimal. In principle, two ICs are all you need for a complete webserver. To avoid any misunderstanding, this is not some kind of demo or prototype, but a fully functional device suitable for industrial applications, and its potential uses extend far beyond what we can describe here.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list
Please note that this unit is available from us as a ready-built and tested PCB.
Home construction using a bare board is nit recommended.
Resistors (SMD):
R1 = 100Ohm , shape 0603
R2,R3 = 24Ohm 9, shape 0603
R4 = 4kOhm 99, 1 %, shape 0603
R5,R10 = 4kOhm 7, shape 0603
R6-R9 = 1kOhm , shape 0603
Capacitors (SMD):
C1,C2,C4-C10 = 100nF, shape 0603, ceramic
C3 = 68pF, shape 0603, ceramic, NP0
Semiconductors (SMD):
IC1 = CS8900A-CQ (5 V), shape TQFP100
D1-D4 = chip-LED, shape 0805
Recommended colours: D1 green; D2 yellow; D3,D4 red
T1 = Ethernet transformer type TG43 (Halo) or ST7010T (Valor), see also ref. [6]
X1 = 20MHz quartz crystal, HC49_SMD case
K1 = 34-way DIL pinheader
K2 = 8-way pinheader
K3 = RJ45 connector (screened)
S1 = mini pushbutton
For software, bare PCBs and fully assembled boards, see the ‘What you need’ box in the printed article
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