Posts Tagged ‘diy’

Circuit Receiver Board
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How To Select Printed Circuit Board (PCB) Manufacturers

It is not an easy job, if you have to choose printed circuit board manufacturers or PCB manufacturers, as they are generally referred. Irrespective of whether you have unlimited funding or a limited budget, the first and the foremost requirement is a reliable and good PCBA manufacturer for your company. With certain tips and guidelines kept in mind, you can definitely go miles, and zero in on suitable circuit board manufacturers.

• To get started, get an initial list of PCB manufacturers. You may need to do a search on the internet for the PCB manufacturers, or you may get details in industry meetings and tradeshows that are conducted to give prospective customers an idea about the products and services.

• If you can get DSCC, QPL or QML list, with the names of a few PCBA manufacturers, then you already have a few links to follow. Being on these lists ensures that CB manufacturers have high quality measures, and latest technology for manufacturing.

• Keep in mind that a printed circuit board manufacturer in your area will be a boon to you, as they are easy to reach in case, you have to inspect their facility, or some problem later. In case you have a large budget, then you can certainly keep the aspect of local PCB manufacturer aside.

• Now from this list of PCBA manufacturers, you need to zero in on PCB manufacturers who have the capabilities that you require. Another important thing to consider is accreditations and customer certifications.

• If you are new in this field then it is better to take help from old-hands, as they can assess quality along with long time reliability given by these circuit board manufacturers.

• Find out about on-time delivery capability of all the printed circuit board manufacturers. And if you have some references, find out the percentage of defective products that they have received from the PCB manufacturers. Provide these PCBA manufacturers with a few designs and get a quote from each.

• Another important aspect is checking the facilities.

• Verification and testing of the products is important too.

These simple steps can help you, the producer goods company.

For more information on How To Select Printed Circuit Board (PCB) Manufacturers and to know all your options for the procedure you want to have you may visit http://circuitboardpcb.net

About the Author

Circuit Receiver Board Questions

Circuit Receiver Board Videos

My Soldering Techniques. Deans Connectors, Splicing, Circuit boards, and Solder Removal.

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Door Control
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Choosing a Garage Door for your Garage

When it comes to garage doors many people might think that there is only one type of door that everyone will have. However there are lots of garage doors available for you to choose from. Not only can you choose the colour and finish of the garage but you can also choose how the door will work, fit and operate whether it's manual or electric.

Professional garage door companies will take all of your requirements into consideration and help you decide on the best garage door for you and your home. They will let you choose the colour of the garage and the style. Once you have chosen your perfect garage door the garage door fitters will come and fit your garage door and advise you of any maintenance needed and how to operate the garage door. Many good companies will continue with their services even after your door has been fitted, with a professional after sales service it makes it so much easier to feel reassured you are buying from a reliable company.

As there are a number of different garage door styles to choose from it can sometimes be quite difficult trying to decide which door will suit you best. You could always find your local garage door company and ask them about what you may need and what might suit you best.

Some of the garage doors that are provided by most garage door companies are Roller garage doors, Up & Over garage doors (retractable and canopy), Sectional garage doors and Side Hinged garage doors. As you can see there are a number of doors to choose from, each with their own special qualities from which you can choose so your door will suit you and your lifestyle best.

An Up & Over garage door is great at giving and making the most of the space in your garage, the door slides straight back into your garage taking up minimal space. This type of door has a great reputation that is mostly due to its easy and simple to use design. These garage doors are only suitable for garages which are 8ft or wider.
If your garage is less than 8ft wide then there is always the option of having a canopy up and over garage door. These will also take up only a small amount of space and benefit from their simple functioning design.

There is also the option to have your garage door controlled by remote, this is great if you want to get in and out of the garage door quickly and easily, it is also good if you cant physically open the door yourself or if you simply always have your hands full.

About the Author

Pippa Young. For more information please visit Garage Doors Ampthill

Door Control Questions

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Laser Garage
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Laser Distance Sensor: Simple Ideas for Easy and Fast Measuring

Conventional measuring method might bother you a lot, especially since it spends too much time to finish this job. Besides, you might also do some mistakes in getting the measurement, so you might not get the precise number of distance. Fortunately, you will have great solution to bring more accuracy and efficiency in doing this job. Just find out laser distance sensor, and you can safe more time and energy in getting more exact measuring.

This is a great tool that surely will be very useful for people in supporting either home or business requirement. You can use it to support your job during your home improvement project or during your professional duty. Whenever and wherever you need to have exact measurement on two separated objects, you can always count on this tool to get precise and exact measurement.

There are surely many different products available for some different requirements out there. Somehow, choosing some popular products that are famous of the durability and efficiency is great idea. One of those popular products is The AR1000 Acuity Laser Distance Sensor. This is an ideal product that handles crane as well as hoist applications. Besides, you can also use it to monitor fill levels of bulk material.

You will be happy with the unique sensor that uses phase shift comparison measurement principles of light available in this product. It is very useful to measure precise measure of distances of 30 meters accurately. Besides, it is also possible to get longer ranges to 150 meters by using the reflective target boards. So, you can easily get easy measuring in quicker performance.

This is a perfect option for people who need too use it for their personal needs. Use it to get precise measurement when you need to build your garden fence, garage, or many other improvements. However, you also need to notice that this sensor is also designed for industrial environments with the NEMA-4 as well as IP67 enclosure ratings. Besides, you can also let the sensor to be rinsed with water directly. It is great, right?

You will still find another option such as Baumer Laser Distance Sensor that is completed with serial interface of RS 232 and RS 485. This certain tool is able to measure distance up to up to 550 mm. Besides, it also has resolution of up to 10 m at 900 s of measuring rate. So, it will be easy for you to get exact and precise measurement in faster time. Thanks to the compact housing, you will also be happy to see that this sensor comes in compact housing for more portability.

You may not be able to recall and transmit the current data continuously during the interface. However, it can be gauged or even archived in a hold register so you can access it later. So, is one of those products your best option?

About the Author

Mostly, people could easily find some best
laser distance sensor
out there. However, you will also be surprised that you will find some superior products of
distance measuring instrument
through your internet. Just get one that meets your needs well.

Laser Garage Questions

Laser Garage Videos

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Sequencer Circuit
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Air News On Learning To Fly: Circuit Work,tHe 'first' and 'second' Nature By Johan Lottering

In June 1978 while taking part as a member of the Defense Force team in the national skydiving championships in Pietermaritzburg, the impossible happened.

After pulling the ripcord there was only blue sky above me, but no canopy! Hurtling through 2000 feet at 176 feet per second the eleven seconds between me and eternity began ticking down.

My body position was almost upright with the malfunctioning parachute streaming in the empty ‘burble' of space above me. It was time to assess the situation, consider the various options, consult the rest of my team and my quick reference handbook; select the best possible option then allocate resources…..

Nobody had told me my goggles would be half over my eyes sockets. Air was being sucked out of every crevice in my contorted face. The bundle of washing above me was jerking me about in all directions. The ground was rushing up. Hysteria tried to choke and overwhelm me. I had to choose real fast. I opted for attempting to impose an emergency drill into the situation. The brain works in split-seconds in such situations.

I unclipped the cape-wells. The main ‘chute separated. Next I turned on my back and clutched the T-7A front mounted reserve. I pulled out the ripcord. The next instant it felt if the back of my head and heels collided as the 24 feet conical reserve' chute snapped open. For an instant I had thought I had hit the ground at the same time the reserve ‘chute had opened.

Strangely I was still safely aloft. The air had stopped howling. I was aware of my breathing. Some seconds later I braced and did a dive-roll in a scorched veldt. The webbing harness had left blood blisters about which I would never complain.

No, its not another ‘when we' tale. I have drawn on the experience many times afterwards in flying. Had I not realized the importance and learnt and rehearsed the emergency drill hundreds of times, I would not have survived .That's the first lesson……..

I recently encountered my friend since school days, Dawid Laas, with ‘arc eyes' reclining in a darkened room. He was using the recovery ‘down-time ‘by doing imaginary emergency drills.

His office recliner chair was doubling for the cockpit of the Impala Jet often seen at air shows in South Africa .He was wrestling with a ‘new' concept to jettison the canopy first before ejecting. Some veteran engineers had convinced him of the merits.

"When the time comes to decide, it's got to be first nature to me," said Dawid."In facing emergency situations, there can never be unresolved issues."

He emphasizes that to be really proficient, emergency actions can never be second nature like we are sometimes taught. That's the difference between life and death.

Roy J. Clegg writes in his excellent ‘The Multi-Engine Rating Flight Manual ‘(2008 issue; p.15) that there is no way around having to know emergency checklists from memory."At fifty feet," he quite rightly states, "you do not even have time to look for the checklist. As you remember only about 70% of something memorized for the first time the next day, data should be reviewed at least once a week to be retained."

The realization that emergency checks have to be ones first instinct and reaction is the other equally important lesson.

First Encounter

A student's first real encounter with emergency procedures of nay kind occurs during the circuits and landings training phase. Some instructors battle with when it would be most viable to first introduce emergency aspects, like engine failure after take-off and/or executing the go-around procedure.

Many instructors advocate that a good basis in normal procedures should be established first and emergencies taught later. My experience suggests that students taught from the onset to be mindful of the emergency situations and drills invariably tend to incorporate this aspect into their flying in the long run.

I believe this makes the fundamental difference between amateurism and professionalism. Students who have never followed this approach tend to be dismissive of emergency training and very difficult to get through to.

Adrian Fischer, a retired Boeing 747 captain, believes pilots should always be so prepared to deal with potential emergency situations that landing without to do a go-around, or taking off without loosing an engine "should almost be a surprise and a disappointment each time."

Some admittedly dedicated instructors tend to use their students as their "masterpieces". As a full-time instructor, I was often guilty of trying to make me and my student look good by sending the more talented ones on the first solo flight the moment everything seemed to come together and not when I had been doubly sure he or she would handle every possibility in the book.

With the benefit of hindsight I would encourage instructors and their protégés to show off in a very different manner.

Today, I would rather make doubly sure a student is absolutely proficient not only in all variation of circuit work  like flapless or short landings  and take-offs ,but the often neglected go-around procedures and engine failures after take-off, as well as on downwind position.

Good sense should, of course, prevail.The eventual aim is to send the student solo. I have found that if the circuit training in overcooked, student's general standard tends to deteriorate. Once the student is proficient and all the drill are in palace and the student is kept back too long, fear at times gets the better of them.

This seems to be a problem especially when a student has been sent solo once or twice and a break in training occurs.

Some students then tend to lower performance levels as "good shows" are "rewarded "by being sent solo flying. To the nervous ones being sent solo in effect becomes a "penalty". Countering the peculiar phenomenon is best dealt with by keeping the pressure on and not being too nice about protestations and complaints from students.

Students are sometimes presented with so many scenarios and options that they become confused about selecting the correct option from any range of stimuli. I find that judgment only comes over time and after repeated analyses of exercises.

At first, the best results seem to originate from letting students do complete sequences as many times as possible. You simply cannot leave it to chance that all appropriate action will be followed through all the time. If you would think this approach is too militaristic, present an off-the-cuff challenge to your fly-buddy, for example: "Engine failure at 50 feet!" or "Execute a go-around now," or "Engine fire on start-up!"

You may be astonished at the level of incompetence. Unfortunately such challenges invariably ruin dinner evenings as inept pilots waste time and conversation trying to justify and explain their hesitation or faltering.

At fifty feet above ground level no time for in-depth critical-analytical thinking exists. This should have been taken care of during the before take-off safety briefing. Do remember, if one flies long enough and/or often enough in all flying careers situations are bound to occur where one would either act swiftly and appropriately, or die.

As instructor one has to be cruel to be kind. Students simply have to memorize and internalize certain "trigger actions "that will get emergency drill sequences going through muscle memory and association. If an engine quits, a students hand has to, for example, immediately and almost impulsively reach for the carburetor heat.

Instructors can often be too nice. My advice would be to never try to be a legend in ones own mind. Never try to create a reputation .But do drill the students till actions are accurate and automatic. Sweat saves blood.

I recently undertook a PPL renewal test for Dr. Johann Grobbelaar (42) in the very same Cessna 182 RG I had once instructed him as young matriculant.We attempted every possible emergency drill we could think of and even invented an original scenario. He passed with flying colours.

He was flying almost three decades ago. It would have been so easy to take short-cuts with emergency drills. I was so relieved having never done so.

Do challenge yourself with emergency drills.

(In the next issue we will look at beginning in earnest the preparation for PPL theory examinations, while practicing taking off and circuits and landings).

About the Author

Anthony Juma is the Editor and Senior Aviation Director at Wings Over Africa Aviation. 
This is an Air Charter Company that specializes on Pilot Training Consultancy, Air Service, Air Operators Certificate, Pilot Refreshers Courses In Kenya, United States Of America, South Africa,Uganda,Eastern & Central Africa. The website has guided thousands of travelers to achieve their dream holiday. For more information and guidance, visit the site at http:// / www.wingsoverafrica-aviation.com/index.php/services/consultancy.html

 

Sequencer Circuit Questions

Sequencer Circuit Videos

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Door Springs
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