Computer Off Switch
How often does it happen that you close down Windows and then forget to turn off the computer? This circuit does that automatically. After Windows is shut down there is a ‘click’ a second later and the PC is disconnected from the mains. Up to now there were no mains switches available with a magnetic coil to turn off the power supply voltage, but now one is available from Conrad Electronics , with the article number 70061 for a price of 12.95 Euro (approx. £ 9.00). Surprisingly enough, this switch fits in some older computer cases.