Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.
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Transcript of Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.
![Page 1: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/1.jpg)
Problem 1
• Choose title
• 1st XML
• 2nd electronic spider
• 3rd infrared remote home control
• Waste time
![Page 2: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/2.jpg)
Problem 2
• Write Program
• Added Delay subroutine
• Added Table Loop
• Delay execution time
• Not necessary
![Page 3: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/3.jpg)
Test ResultInput (dual-tone signal) Output (89C51 port1 LEDs) pin8 to pin1
0 0 0 0 0 1 1 1 1
1 0 0 0 0 0 0 1 0
2 0 0 0 0 0 1 0 0
3 0 0 0 0 1 0 0 0
4 0 0 0 1 0 0 0 0
5 0 0 1 0 0 0 0 0
6 0 1 0 0 0 0 0 0
7 1 0 0 0 0 0 0 0
8 1 1 1 1 1 1 1 1
9 0 0 0 0 0 0 0 0
0 0 0 0 0 1 1 1 10-off
1-on
![Page 4: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/4.jpg)
Problem 3
• LEDs unstable
• Use resistor connect 5V
• Pulled the LEDs HIGH
• LEDs become stable
![Page 5: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/5.jpg)
Problem 4
• Remove Reset button
• Cannot receive input signal properly
• Added the Reset button in 89C51 pin 9
• 89C51 receive signal before pressed Reset button
![Page 6: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/6.jpg)
Problem 5
• Test success in the breadboard
• Tried to connect to the board
• Telephone’s current breaks down the 89C51
• Added a relay counter
• Hold the input current
![Page 7: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/7.jpg)
Problem 6
• MT8870 does not auto hook off on telephone
• Connect to 4040 & RY6WFZ-K relay to MT8870
• Ringing value at 2 to power 12
• Can auto hook off the phone
![Page 8: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/8.jpg)
Problem 7
• Voltage of ringing signal between +1.4V to –1.4V
• Unstable & Not enough power
• Connect 4040 with amplifier & transistor
• Pulled HIGH the voltage
• Rectified the current
![Page 9: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/9.jpg)
Problem 8
• Dual tone receive signals– Full wave rectified
• 4040 counter only accept – Half wave rectified
• Added a diode to transfer
• Signal become half wave rectified
![Page 10: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/10.jpg)
Problem 9
• Signal’s current too high
• 4040 Counter break down
• Change the 4040 counter
• Added a relay to prevent
![Page 11: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/11.jpg)
Test Result
• Phone in Phone 4040 counter auto hook off Key pressed Dual tone MT8870 Binary code 89C51 LEDs Display the result
![Page 12: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/12.jpg)
MT8870 & 89C51 scematic
![Page 13: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/13.jpg)
MT8870 & 89C51 breadboard
![Page 14: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/14.jpg)
Relay & 4040 counter schematic
![Page 15: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/15.jpg)
4040 counter & relay breadboard
![Page 16: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/16.jpg)
Power supply schematic
![Page 17: Problem 1 Choose title 1 st XML 2 nd electronic spider 3 rd infrared remote home control Waste time.](https://reader035.fdocuments.us/reader035/viewer/2022072015/56649ed05503460f94bddbbf/html5/thumbnails/17.jpg)
Power supply board