Showing posts with label touch. Show all posts
Showing posts with label touch. Show all posts
Sunday, September 14, 2014
Touch N Flip
Ever wonder how a touch plate, like the kind you see on some elevators and lamps work? This schema will give you a feel for how the touch plate works in a schema and you can expand on the schema to suit your project needs. The touch plate can be a small piece of metal or aluminum foil. Start the schema by moving S2 to the set position and then back to the previous position. Now press S1. One of the LEDs will light. Now touch the touch plate and the LEDs will flip on the opposite way. The sensitivity of the plate will vary depending on the humidity. Adjust the VR and capacitor that is connected to S2 to adjust the sensitivity.
Friday, September 5, 2014
touch switch circuit
The modern mechanic switches are improved concerning of old technology. We need however many times to replacement some old switch or to check currents bigger than the durability of certain switches or simple we need something with modern appearance. For he and different reasons is essential the up schema. It is simple in the manufacture and the materials that use they exist everywhere.
Parts:
R1 = 3.3M
R2 = 3.3M
R3 = 10K R4 = 1K
C1 = 10nF-63V
D1 = 1N4007
D2 = Red LED
Q1 = BC547
IC1 = NE555
RL1 = 12V Relay This schema is based on the well known timer IC 555 (IC1),
which drives a relay of which the contacts play the role of switch. The metal surfaces can have what form we want, but it should they are clean and near in the schema. In order to it changes situation it suffices touch soft somebody from the two plates. Plate MP1 in order to the contacts of RL1 close [ON], or plate MP2 in order to the contacts of RL1 open [OFF]. The current that RL1 will check depended from his contacts. The Led D2 turns on when the switch they are in place ON and the contacts of RL1 closed. Two small pieces of metal can be used instead of MP1 – MP2. Because MP = Metal Plate.
Wednesday, September 3, 2014
Build a Toggle Touch Switch Using Two Inverter Gates
We can make a simple touch switch using only two inverter gates, two resistors, and two capacitors. The schematic diagram of the schema is shown in the figure below. At power up, the output (of U1A) will be high, and the inverting output will be low because U1A gate will be triggered to ground level by C2. After triggered, the low level of U1A input is maintained by U1B output via R2.
Toggle Touch Switch Using Two Inverter Gates Circuit Diagram
After U1A input goes high then U1A output will go low, and now U1B will go high to maintain high voltage level of U1A via R2, so we can release our finger without loosing the last state. Touching the pad again after we release our previous touching will toggle the output as the condition is reversed.
After we touch the pad, we have to release before 1 second (R2C2 time constant) elapsed. If we touch the pad longer than R2C2 time constant then the output will oscillate (about 1 Hz).
Wednesday, August 27, 2014
Touch Switch using NE555
The series of touch switch or touch switch is built by IC NE555, a series of touch switches can be used to turn on lights, alarms or other electronic equipment.
This circuit uses 2 pieces of metal plate media as touch, MP1 (Metal Plate 1) and MP2 (Metal Plate 2). Touch switch circuit is equipped with a visual LED indicator for relay status (load active). To enable (Relay ON) can be done by touching the surface of MP1 and to turn it off by touching the surface of the MP2. MP1 and MP2 in touch this switch can use a small piece of copper (diameter 5mm) was enough.
This circuit uses 2 pieces of metal plate media as touch, MP1 (Metal Plate 1) and MP2 (Metal Plate 2). Touch switch circuit is equipped with a visual LED indicator for relay status (load active). To enable (Relay ON) can be done by touching the surface of MP1 and to turn it off by touching the surface of the MP2. MP1 and MP2 in touch this switch can use a small piece of copper (diameter 5mm) was enough.
Touch Switch series with NE555.
Component List 555 touch Switch
R1 = 3.3M
R2 = 3.3M
R3 = 10K
R4 = 1K
C1 = 10nF-63V
D1 = 1N4007
D2 = Red LED
Q1 = BC547
IC1 = NE555
RL1 = 12V Relay
Friday, August 22, 2014
Touch Alarm circuit
This is touch alarm schema.Here I have used very common Ic NE555 And common parts.Then easily you can make your schema.You can attach this schema for your door lock or for any other metal part.If some one touched that metal part the alarm will start to ring.You can use this schema as a security schema.Even you can attach this schema for your fence.
Parts
# Transistor 2N3904
# Diode 1N4004
# IC LM555
# Relay
# Resistor 56 K
# Resistor 100 K
# Resistor 10 M
# Resistor 220 K
# Capacitor 47 uF at 16 V
# Capacitor 33 uF at 16 V
# Potentiometer 100 K
Note
# This schema operates with 6V battery
#Connect touch pad to the metal plate of your main door or fence
Wednesday, August 13, 2014
TOUCH SWITCHS
TOUCH SWITCH 1
This schema detects the skin resistance of a finger to deliver a awfully tiny current to the super-alpha try of transistors to show the schema ON. The output of the "super transistor" activates the BC 557 transistor. The voltage on the highest of the world is passed to the front of the schema via the 4M7 to require the place of your finger and also the schema remains ON.
To turn the schema OFF, a finger on the OFF pads can activate the primary transistor and this may rob the
"super transistor" of voltage and also the schema can close up.
TOUCH SWITCH-2
This schema detects the skin resistance of a finger to show the schema ON for concerning one second. The output are often taken to a counting schema. The schema consumes no current when in quiescent mode:
This schema detects the skin resistance of a finger to deliver a awfully tiny current to the super-alpha try of transistors to show the schema ON. The output of the "super transistor" activates the BC 557 transistor. The voltage on the highest of the world is passed to the front of the schema via the 4M7 to require the place of your finger and also the schema remains ON.
"super transistor" of voltage and also the schema can close up.
TOUCH SWITCH-2
This schema detects the skin resistance of a finger to show the schema ON for concerning one second. The output are often taken to a counting schema. The schema consumes no current when in quiescent mode:
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