• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6
7. 7
7
8. 8
8
9. 9
9
10. 10
10

Electronics Project - Digital Metronome

Extracts from this document...

Introduction

Digital Metronome Planning A1: I am going to make an electronic metronome device which produces equally spaced sound at a variable speed which is displayed in beats per minute. A2: The system consists of several sub-systems. The basis of the system is the two astable oscillators. One oscillator is variable between frequencies of around 40-300 Hz by the use of a potentiometer and the other has a fixed frequency of 1Hz. The outputs of the two oscillators are put into the inputs of an AND gate and the output of the AND gate is used to drive a counter. The counter is linked to a decoder and a 7 segment display. The terminal count output of the counter is connected to the clock input of a second counter which is also linked to a decoder and a display and a third counter is also linked in this way. This sub-system thus produces a 3 digit visual output showing the frequency in Hertz of the variable astable oscillator. The output of the variable astable is also take to a series of counters and logic gates which divide the frequency of the output of the oscillator by 60 which gives an output of the same frequency in beats per minute as the frequency of the variable astable in Hertz (pulses per second). ...read more.

Middle

2. The metronome must operate at speeds of 40 - 300 beats per minute 3. The system must have a display output showing the speed of the metronome in beats per minute accurate to + 10% A6: Instead of using seven segment displays to show the speed, I could have used a different display system such as an LCD display. An LCD display would be capable of showing the same information as he seven segment displays and would possibly look much neater. The reasons I decided to use seven segment displays over and LCD display are: 1. Although the system would take up less space on its own, it may end up using more space on the board than the seven segment displays as it could possibly need a lot of decoders. 2. Also I understand how seven segment displays work but I do not know anything about the workings of an LCD display so the use of it would require a lot of research ad I would be more likely to make mistakes hen using it. A8: A9: Resistors I have used the following resistors in my circuit: * 4.7K? for the timing mechanism of the oscillators * 1.2K? for protecting the 7 segment displays * 100? to protect the LED and the rest pin of the counters in my frequency divide by 60 sub-system * All resistors have a tolerance of + ...read more.

Conclusion

circuit and also taken readings from the 3 digit display to see how these match up to the actual frequencies of the pulse. The frequencies appear to match up to a certain degree of accuracy so the circuit works as it was intended. C3: My circuit worked as I intended which was for it to be an "electronic metronome device which produces equally spaced sounds at a variable speed which is displayed in beats per minute". I have also met all of my original objectives: 1. The circuit must work with a 9v + 1v power supply so that it is able to operate with a 9 volt battery as well as a power supply. All tests were conducted using a power supply on a 9 volt setting and the circuit worked as required. 2. The metronome must operate at speeds of 40 - 300 beats per minute As shown in the tests above the metronome operates at speeds of 6 to 308 beats per minute. 3. The system must have a display output showing the speed of the metronome in beats per minute accurate to + 10% As shown in the tests above the display shows a reading which is within 10% of the speed of the metronome beats. C4: As the circuit worked as desired, there was no need to make any improvements to its workings. ?? ?? ?? ?? Adam Arstall ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Systems and Control section.

Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

Related GCSE Systems and Control essays

SURVEY EMAIL MAGAZINES I think my finished project should: * Have several outputs * Have easy battery access * Have an On / Off switch * Have out of the way leads that are well secured * Be able to be produced within 40hrs * Be made out of materials

2. Elecrtonics - Audio Amplifier

with a variable resistor for ease of adjusting. Testing:- These tests have provided the desired results, proving that this subsystem is working properly. Subsystem 3 - Bass and treble controls Using the circuit simulating program, 'Livewire' I will test that this circuit does decrease the frequency cut off points: <

1. Building a mass balance to measure small weights (0g-100g) using a rotary potentiometer

Although the last digit on the digital multi-meter fluctuates this only means that the change in magnitude is been resolved. Linearity: My graph (output against mass) is a straight line graph(upward sloping) showing the relationship is proportional(as mass increases, the output increases).

2. Bicycle Alarm Project

The IC has sequential logic inputs so as the PIN must be entered in the correct order. There is a out of sequence output and a wrong entry output. The drawing below shows the pin layout of the IC. The IC is in a standard 14 pin DIL package.

1. Review of Electronics Systems in Society

They also have a positive impact on the economy as lots of people buy expensive electronic products and the companies that manufacture them receive huge profits. Electronics have provided many new jobs in areas such as IT. There are significant environmental issues associated with electronics such as the fact that obsolescence causes much waste to be produced.

2. The paper discusses the issues associated with the risks assessed between the organizations bidding ...

Avral Electronics, another electronics equipment and components manufacturer which is headquartered in Paris and also has manufacturing facilities in Ireland, France, and three Asian nations. Avral is a lucrative organization that has shares traded through Paris Bourse, Frankfurt Stock Exchange, and New York Stock Exchange.

1. A commercial company requires a dynamic advert for displaying their wares in a showroom/office ...

to spend 13 hours on the designing and 27 hours on making the final project. I need to spend more hours on making the electronics rather than the case, as it is these that I get the most marks for.

2. 'A small business wishes to sell a range of electronic games to help alleviate ...

The Chip is reasonably resistant to interference in bright light, fluorescent light or in areas with high background infrared levels. The second amplifier amplifies the signal further. The third amplifier separates the pulse-intelligence from noise. The inverter inverts the output signal at pin7 to a negative pulse and so gives a positive output at pin8.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to