Jumat, 23 September 2011

Saklar Sentuh

This is a Turn on and turn off your electrical devices using touch switch, so you can “play” your electronic devices more fun. Touch switch don’t need mechanical part, so they will not worn out due to mechanical contact. Touch switches can be used in places where regular switches would not last, such as wet or very dusty areas. You just need to add some relay to switch your devices which require high voltage supply.


saklar sentuh
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Component list:

C1: 10uF/16V Electrolytic Capacitor
R1, R2: 100K 1/4 Watt Resistor
R3: 10 Meg 1/4 Watt Resistor
U1: 4011 CMOS NAND Gate IC
MISC 1 Board, Wire, Socket For U1


Notes:
  • The contacts an be made with just two loops of wire close together, or two squares etched close together on a PC board.
  • When activated, the output of the circuit goes high for about one second. This pulse can be used to drive a relay, transistor, other logic, etc.
  • You can vary the length of the output pulse by using a smaller or larger capacitor for C1.


IC 4011 Description:

The HEF4011B provides the positive quadruple 2-input NAND function. The HEF4011 have equal source and sink current capabilities and conform to standard B series output drive.
The devices also have buffered outputs which improve transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.


The HEF4011B Features

Low power TTL: Fan out of 2 driving 74L compatibility: or 1 driving 74LS
5V–10V–15V parametric ratings
Symmetrical output characteristics
Maximum input leakage 1 μA at 15V over full
temperature range.

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