- on Microcontrollers
- Published in issue 7/2004 on page 0
control and regulation via the Internet
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.
Home construction using a bare board is nit recommended.
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
C1,C2,C4-C10 = 100nF, shape 0603, ceramic
C3 = 68pF, shape 0603, ceramic, NP0
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. 
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