Disclaimer:   Whilst every effort is made to ensure the accuracy of these circuits,   there will be some out there
who will make it and do it wrong, thus destroying their hard drive or in some cases their motherboard and Hard 
drive. We do not make any warranties regarding these web site circuits, these are to be used as a "guide only".
You alone must determine if it is suitable for "your expertise" to build or assemble any project, here or elsewhere.
If you think you cannot do it, then play safe and don't. Please, save yourself the agony and find someone qualified 
who can ! We cannot, nor will not be responsible for any errors or omissions or accidents made in using this circuit.

These circuits were devised here at Unitech and kept as simple and yet as functionally possible for all folks to use.
The circuits contained on the Unitech Electronics web site are "as is" and no warranty what-so-ever regarding accuracy, 
function ability or suitability for your purpose or your personal application is made what so ever. Use at your own risk.

We draw your attention to the fact that some circuits are connected to the domestic  240 V AC mains.     If you are not
fully conversant with mains wiring safety procedures, then please consult someone who is.   Death is very permanent.