Reflection

Through out this subject I have learnt many things that I didn't knew before. Specially how a signal jammer works and how radio frequencies work. As we were doing the project that related to radio frequencies we have learnt how to make a radio frequency jammer and how they work. Its a simple device just block cell phone frequency just by transmitting on same frequency as cellphones. Also because of the things we have face during this project specially time limit we had during the project we learnt how important to have an gannet chart through out the project. its helps us finish our project on time. but unfortunately we didn't understand earlier how important to follow the the gannet chart.

In the end I hope everything I learnt from this subject will be helpful to me in future and I would like to thanks Dr Roman Kudin and Mr Vijay Naidu for helping me and back me up while doing this subject. And my project partner for helping me out to understand specially electronics in the project.
Thank You
Derick 

Final week

We are doing the final presentation this week. and the new circuit we started for the signal jammer didn't work due to a bad IC. Because the IC we ordered from China is not a good quality one. So we had to go for a some other solution. That's how we came up with the idea to make an cellphone signal detector. Using a cellphone signal detector we can detect people who are using cellphones around traffic lights and warn them not to use cellphones. It's still going to reduce accidents around traffic lights. Same time we are going to use a bright flash light that flash on people to let them know that they are on a traffic lights. below is a cellphone signal detector.

fig 1: Cellphone signal detector 

When someone is using cellphone this circuit going to flash the LED light. That way we can worn people who is using cellphones near traffic lights. That's all for the week. Hope to do our final presentation successfully. 

See you,

Derick

week 15 - starting a new circuit

we have talk to mr Roman and Mr Vijay regarding our EMP jammer and we didn't get good comments on it. According to them its much safer to use RF jammer than EMP jammer as we working with high voltage. So we are going to go with the our RF jammer. And hoping to make RF jammer as much as accurate as we can. Also we are geting ready for the presentation next week.
See you
Derick

week 14

So last week we have make an prototype for the EMP jammer and it's working fine. we just have to increase its strength to increase the jamming parameter. Before that we are planing get lectures comments on it. And below is the video of the EMP jammer. In that video its showes jamming a ipad. But just close distances only.

That's all for the week. and we have started working on the final presentation and report. Will bring you the details on final presentation next week. See you until next time,
Derick

week 13- New Jammer Circuit

As I told last week we started making a new circuit for the jammier we found from net. And had to wait for another one week to finish it fully. We are waiting for the parts we have purchased online. hoping to finish it as soon as we get the parts. Also still we are working on making our old circuit get to 850mgz. That's the frequency we want for the jammer to block cell phones.
Also we have an idea of making a EMP jammer in case if we are not succeed with the RF jammer. And planing to make a prototype and get the Mr. Kudin's and Mr. Vijay's comments on it.

week 12- Failed circuit

Last week we got few thing we have ordered online and restarted making the new circuit for the jammier. Because the jammer we were working for the last few weeks didn't work and its generating only around 450mgz frequency. So we had to start a new one. and we have ordered few more components for the  new circuit. This is the first circuit that we have make.

Fig: Failed jammer circuit 

This week we are starting the new circuit and hoping to get good result. and same time planing on get some advises from Mr. Vijay and Dr. Roman Kudin. What need to be improve to get good result out of our circuit. That's all for the week,

See you all next  week,

Derick

week 11- Ordering more components

Unfortunately last week we had to order some electrical parts online as we couldn't find any from Jaycar Electronics. Hope we will get them by next week to continue our circuit and finish it up as soon as possible before the final presentation.

fig 1:

fig 2

fig 3:

These are receipt of the electrical components we have ordered. That's includes Antenna, Inductor and a BF494 transistor. Until we get these stuff we are hoping to work on the final presentation. What are we planing to include there. Will get back to you next week. Until then see you!

Derick 

week 10 making a prototype

We have started to make a prototype of the jammer this week. But its not fully completed as we have limited time to meet. But we manage to make a half of the circuit. There are more to do and Its not easier than we thought.

fig 1: Making of signal jammer prototype

This is all we have done this week and hoping to finish this by next week. 

See you until next week,

Derick

week 9

Last week me and Jason, we went to Jaycar Electronics to buy electronic components for our signal jammer. And we have purchased few of the components we needed for the jammer. Below are the things we have bought from Jaycar Electronics. 

fig 1: Capacitor 

fig 2: Resistors

fig 3: Resistors

fig 4: Electronic board wires 

These are the things we bought last week and planing to start making a prototype using a breadboard next week before goes for the real jammer. That's it for the week.

See you,

Derick

Week 8 - Interim Presentation

Last Friday we have done our interim presentation. In this presentation we needed to present updates on our projects and what's going on now in our project currently.  

fig 1: Interim presentation (taken by Ikwan)

fig 2: Interim presentation (taken by Ikwan)

During the presentation we have started with radio frequencies and unfortunately Jason has forgot to give an reminder on our problem and the solution we have choose for the project. and secondly I have explained them about what is signal jammier and how signal jammier work. But it didn't go as I planed. I fail to explain properly how signal jammier block cellphones signals. Also I have showed them some different types of signal jammers. As the last part of our presentation Jason has explained them of our jammer circuit and how it's going to work. Below is the content page of our presentation.

fig 3: Content of interim presentation

 

After the presentation we have propose them of our new idea about the lights we are planing on using. Its an idea about using a bright light that reflects on pedestrians. I will bring more details about this next week. We are still researching on this. That's all for this week. Please comment below if you think I missed anything. 

See you all next week,

Derick.  

Week 7: RF Amplifiers

We have done some researches on RF amplifiers and found out some different amplifiers. Also found what are the purpose of them. There are few different amplifiers in the market using for different purpose. Some of them are RF amplifiers, audio power amplifiers, and microwave amplifiers.

Fig 1: RF amplifier (aliexpress.com)

fig 2: Audio amplifier (canakit.com)

For our signal jammier we need a Radio Frequency Amplifier (RF). What RF amplifier do is converts a low power radio frequency signal into high power signal. And RF amplifier is the one that drives the antenna of the jammier. So depends on how power full our jammier need to be we have select correct amplifier.

And the stereo pre amplifier we found last week from Jaycar electronics can't use for the jammier because that is use as a electronic amplifier that converts weak electronic signal strong enough to receive by main audio amplifier for further processing (wikipedia.com).  

We are planing on order an RF amplifier online because we couldn't find any from Jaycar Electronics. Hope to get it as soon as possible.

That's all for the week. We are getting ready for our interim presentation  next week. Come back next week with a summary of the presentation.

See you all next week,
Derick

Week 6- Checking components and prices for the jammier

Last Friday me and my partner Jason we have visited Jaycar  Electronics for check the electrical parts and prices we need for the jammier circuit. Below is the final diagram we are following to make the circuit. And we have check things we need for the circuit.

Fig 1: Jammier circuit diagram

  

These are the list of things and prices we have check from the Jaycar Electronics,

• Metal box (for the jammier) - 44NZD
• 1u capacitor- 2.80NZD
• C1 15pt capacitor- 1 NZD
• C2 4.7pt capacitor- 1 NZD
• C3 4.7pt capacitor - 1 NZD
• C7 10pt capacitor - 1 NZD
• C4 102pt capacitor - 1 NZD
• Q1 BF494 transistors - 1 NZD 
• R1 39k resistor - 0.70 NZD
• R2 100k resistor - 0.70NZD
• Inductor 22mH  

We also check amplifier for our jammier and we found few different amplifiers. But not sure which one we need for the jammier. so need to do some researches on amplifiers and is there any different between amplifiers we found. 

fig 2: Stereo amplifier (taken by Jason)

  

Also we have check some price rangers of LED flexible strip lights. We just check the prices only. we haven't discuss anything about lights yet. Our first target is to finish our jammier and then goes to lights. 

fig 3: different LED strip lights (Taken by Derick)

fig 4: Jason checking on components need for the circuit (taken by Derick)

fig 5: me checking on amplifiers (Taken by Jason)

That's it for this week. Next week we need to find out about amplifiers and differences of them. 

See you until next week,

Derick. 

Week 5 Continue making Signal jammier

Before we start making the signal jammier we need to find out what frequency cellphones are operating. so according to that frequency we can adjust our device to the same frequency cellphone are using. Below are the standard frequency's cellphones are using.

• AMPS - 800MHz
• PCS - 800MHz, 1800MHz, 1900MHz
• GSM - 850MHz and 1900MHz in America , 900MHz and 1800MHz in Europe and Asia
• GPS - 1227MHz in military and 1575MHZ in civil
• Wi-Fi/Bluetooth - 2400MHz to 2500MHz
• RFID (UHF/VHF) - 14MHz-1400MHz, 800MHz-2450MHz 

According to the frequency we are blocking we need to choose which frequency we are going to jam. Most text walkers are using GSM when they are distracted from phones. So blocking only that frequency would be enough. 

And another important part is FR amplification unit in our jammier. Because it decide what is the area we covered from the jammier. we need to consider more on this Because we don't need to disturb other people around that area. 

Fig 1: FR amplification Unit (White, 2011)

  

That's all for the week. And we are planing on check the prices for these electronics we need to make the signal jammier coming week. 

Catch you all next week,

Derick

Week 4: Learning how to make a signal jammier and How it's work

Last Tuesday me and Jason we have discussed how we are going to make the signal jammier for our project "text-walking accident avoiding system on traffic lights". That is the first thing we are going to start up with. We have done some researches and found how a signal jammier works. We are trying to make it work on radius of less than five meters. Because we can't disturb other drivers or other people around that area.

Basic operation of a signal jammier

Cell phones works by communicating with it's service network through a signal tower or a base station. So, when you move one place to another signal is handed from tower to tower. And cell phone are using radio frequencies to communicate with towers.

Fig 1: How cell phone signal works (howstuffworks.com) 

 What jamming device do is transmitting on the same radio frequency as the cell phone and disturb the communication between cell phone and the base station in the tower. they call it denial-of-service attack. Jamming device transmitting a signal on same frequency and at high enough power so the two signals collide and cancel each other out.

Fig 2: how jamming device works (howstuffworkes.com)

So now we know how a signal jammier works. But we need to find out whats the frequency cell phones are using for the communicate. As I found out they use two separate frequencies, one for talking and one for listening. When you block one frequency cell phone are trick to think there is no signal when its get only one frequency. So, its effective to block only one signal.
To jam signal we need to make a device that transmit same radio frequency as cell phone. Most of the cell phones are using radio frequency between 0.9GHz to 1.9GHz. And depends on the continental you are in, its changing.

What we need to make a signal jammier

Basically as I found out we need the antenna, circuitry and power supply to make a signal jammier. Below are the main electric components we need to have in our circuit.

1. Voltage controlled oscillator- this creates the radio signal 
2. Tuning circuit- this controls frequency at which the jammier broadcast its signal by sending particular voltage to the oscillator. 
3. Noise generator- this is to creates random electronic output in a specified frequency to jam the cell phone network signal. 
4. RF amplification- this thing boost the power of the radio frequency out put to high enough level to jam signal.

This is what we found on signal jammier and Jason found a circuit diagram on signal jammier. We are planing to use it as our guide to make the jammier. Hope we can make a strong enough jammier to disrupt the cell phone signal around traffic lights.

Fig 3: Circuit diagram Jason found (Reference unknown)

 And that's all for the week. hope this information's here are enough to understand how a signal jammier works. Feel free to leave a comment below if I wasn't cover anything.

See you until next time,

Derick
   

Week 3

With the all the researches and solutions we found on text-walking last week we have submitted our project proposal to Dr. Roman Kudin and Mr. Vijay Naidu.  We have done our presentation on last Friday. In our project proposal we have explained what are the two problems we came up with which are text-walking and distracted drivers who drives with a baby. But we have selected text-walking as our problem. And I have included on the proposal evidence that we found on text-walking is existing problem. Also we have include solutions it has currently, our solution and Gantt chart.

Fig 1: Proposal content 

Fig 2: Proposal front page

In the Presentation me and Jason have explained our problem and we showed different articles and researches from different countries. And also we explained what are the solutions that are taken by different countries to solve this problem. Some countries have stared fine text walkers. More solutions are on testing stage because this problem is just starting to increase day by day.

Fig 3: Presenting Survey results from different countries (taken  by Iqwan)

Fig 4: Introducing text-walking problem (taken  by Iqwan)

Middle of the presentation Jason has explained our solution. Our solution is use a Signal Jammier to block signals around pedestrian crossing up to 4 or 5 meters and install a traffic lights on the ground. So in case still someone looking down at your phone you might see the ground traffic lights. We are planing to build our own signal jammier so we can make a signal jammier that can adjust the parameter it works. Who ever comes inside that parameter they cant text walk inside there. 

Fig 5: Explaining our solution (taken by Iqwan) 

Fig 6: Our solution plan

End of the presentation Dr Roman Kudin guided us to try to find a way to limit the signal jammier only to work for pedestrians not disturbing nearby restaurants or other places. He also said that installing ground traffic lights on every intersection will be a big cost. And Mr. Vijay Naidu said we need to make the signal jammier adjustable so we can use it to any intersection. All the intersection are not in same size. So it should be adjustable. They gave us some good ideas to go on our projects. 

Fig 7: While giving us advises for the project (taken by Iqwan) 

Week 2 - Text-Walking Addiction

According to various research done by different researcher's it has found text-walking is more dangerous than distracted driving. According to test done by the University Of Queensland they confirmed people cant walk in a straight line while texting. And people are walking slower when texting than they are walking without texting. The University of Queensland also found that most of people who participate in research lost balance and focus of their surrounding while text-walking.

The research also found in New Zealand in year 2013 35 people were reported to ACC injured while text-walking.

Figure 1:Text Walking (travelwayfinding.com)

Figure 2: Sarah Jessica Parker texts on the move (telegraph.co.uk)

Now a days new rules are introducing to reduce accidents that occurs from text walking. In Belgian city, they introduce a new text walking lane for smart phone addicts. So the smartphone addicts wont disturb the other road users.

Figure 3: Text walking lane Belgian (digitaltrends.com)

In Germany they have introduce a new traffic lights on the ground level. so the text walkers don't have to look up. They will notice the traffic lights on the ground as they already looking at down. According to European survey they have found 20% of pedestrians are distracted by smarts phones that creates various dangerous situations to drivers and other pedestrians. 

Week 1- Choosing a problem

Last week me and my partner Jason who I'm doing the project with discussed what are the problems we are facing in transport sector. Jason came up with few problems they are facing in Malaysia. One of them are considerable amount of kills in Malaysia happens from motorbike accidents. we discussed inventing some thing that can reduce motorbike accidents.

Another problem is people texting while walking and meet with an accidents in near traffic lights. so we thought make something that can alert people when they comes near to a pedestrian crossing. Those are some of the ideas Jason had.

Text while walking (strawderman.com)

I experience one problem when I'm driving with my house mate. He has 6 months old baby. sometime he's driving alone with her and there is a rule in New Zealand we can't keep the baby seat in front seat it has to be back seat and facing rear ward. So he has to use a small mirror that hangs on the seat to see her while driving. That makes him hard to concentrate on road. so i thought of inventing something that can solve this problem.These are the problems we came up with.

We have discussed these problems with our lecturer and planing to go on with the problem text while walking.

That's all for the week. Catch You on next week.

Derick