Automatic Room Light Controller with Didirectional Visitor Counter

This project has many applications and many future expansions and functions that can be added on. By having a variable floating DC power supply, 7Hz-6 KHz function generator, and oscilloscope with leads connecting to any circuit built, the comprehensive hands-on learning tool would be ideal for most DeVry students.

When the current exceeds its pre-determined value, solenoid forces the moveable contact to open and the MCB turns off and discontinuing the current to flow in the circuit. To resume the flow of current; the MCB needs to be turned on manually.

This stage is called repolarisation. The K+ channels then close, the sodium-potassium pump restarts, restoring the normal distribution of ions either side of the cell surface membrane and thus restoring the resting potential. In response to this the Na+ channels in that area would open up, allowing Na+ ions to flood into the cell and thus reducing the resting potential of the cells. If the resting potential of the cell drops to the threshold level, then an action potential has been generated and an impulse will be fired.

B ) (1) neurotransmitter released (2) diffused across the synaptic cleft to a receptor protein (3) binding of the transmitter opens pores in the ion channels and negative ions move in.

The receiving coil was connected in parallel to the coupling capacitors of 100nF. These capacitors helps the coils to improve coupling co-efficient.

By manipulating the key characteristics of the Schmitt trigger, it produces different frequencies fed to the speaker to operate. One key component of the Schmitt trigger is to determine the high and low thresholds at 3V. This is done with the help of the data sheet values as presented in the appendix below. The next section 3.2 contains a detailed explanation of the design process.

1). Design the circuit for the given specifications. 2). Write the program code. 3).

letting t ¼ nTs, where Ts is the sample interval, the digitalmulti-carrier transmitter output is now

In this reaction, a rate-determining step should occur through the ionization between carbon and –OH bond to form an intermediate.11 This step should be followed by rapid reaction of a nucleophile to wrap up the substitution.11 For this experiment, hydrochloric acid was used to drive off the reaction, which contains a chlorine ion, a common nucleophile. (1)Chlorine ion is more effective as a nucleophile than water; because an ion holds a negative charge and resulting in a faster rate of reaction, whereas water holds a neutral charge, resulting in a slower rate of reaction with a carbocation intermediate.13 The starting

BANG, BANG, the gun fires off. She knows what she has done is wrong, but she did not know what to do, he had to pay for what he has done. She stands there looking at his cold lifeless body lying on the hardwood floor, she sees blood leaking onto the floor. She cannot stay here, she puts the gun down beside him and flees, she does not know where she is going, she just knows she has to run.

To reduce the energy consumption, the control system should be designed as working in two models, high speed or low speed when there is no people use the escalator. The specific requirements are listed as below: 1. Suitable sensors are chosen to detect the number of people in the escalator. 2.

The reaction is an electrophilic aromatic substitution, the hydrogen atom of the aromatic ring is replaced as a consequence of an electrophilic attack on the aromatic benzene ring. (chem.ucla.edu, 2015) An electrophile attacks the pi electrons of the benzene ring from acetanilide, and this forms a resonance which stables the carbocation. The carbocation is attacked and it loses a proton.

Case countdown, the timer is set to 90, 60, or 30 days, when the display flashes zero, it is time for a change. The user swaps for a new case from one of the rainbow of case

Pin 2 is connected to LDR (photo sensor) and pin 3 to 1 kΩ resistor, which makes the laser light on the LDR have a low resistance, making the 741 op-amp stop the buzzer from going off. When the laser light is interrupted the LDR resistance will increase, which hits a point less than that of resistor making the 4017 ic op-amp to switch to the output pin 1, because of that the power supply to LDR being cut off allowing the buzzer to go off. Pin 7 the voltage is coming in through it while pin 4 is connected to the

RECEIVER SECTION:- This section is worked as a Flip-flop (Bistable). IC-3 is decade counter, its Pin No.14 is input and Pin No. 2 output. The output of frequency detector stage is used, via a flip-flop, to switch ‘ON’ or switch ‘OFF’ a LED alternately. The receiver uses infrared modules IR-signal from the transmitter is sensed by the sensor through and its output PIN 1 goes low and switched LED. IC-3 is worked on clock pulse which receives to infrared modules at Pin No. 14. Its output at Pin No 2 throughes high.