Circuit Wiring Solution: auto

Showing posts with label auto. Show all posts

Wednesday, November 5, 2014

Inverter Overload Protector With Delayed Auto Rest

An overload condition in an inverter may permanently damage the power transistor array or burn off the transformer. Some of the domestic inverters sold in the market do not feature an overload shutdown facility, while those incorporating this feature come with a price tag.the circuit presented here is an overload detector which shuts down the inverter in an overload condition.

Inverter Overload Protector With Delayed Auto Rest Circuit diagram:

It hasthe following desirable features:

It shuts down the inverter and also provides audio-visual indication of the overload condition.
after shutdown, it automatically restarts the inverter with a delay of 6 seconds. thus, it saves the user from the inconvenience caused due to manually resetting the system or running around in darkness to reset the system at night.
It permanently shuts down the inverter and continues to give audio warning, in case there are more than three successive overloads. Under this condition, the system has to be manually reset.(Successive overload condition indicates that the inverter output is short-circuited or a heavy current is being drawn by the connected load.)

Inverter Overload Protector With Delayed Auto Rest

The circuit uses an ammeter (0-30a) as a transducer to detect overload condition. Such an am-meter is generally present in almost all inverters. this ammeter is connected between the negative supply of the battery and the inverter, as shown in Fig. 2. the voltage developed across this ammeter, due to the flow of current, is very small. It is amplified by IC2, which is wired as a differential amplifier having a gain of 100. IC3 (NE555) is connected as a Schmitt ‘trigger’, whose output goes low when the voltage at its pin 2 exceeds 3.3V. IC4 (again an NE555 timer) is configured as a monostable multivibrator with a pulsewidth of 6 seconds. IC5 (CD4017) is a CMOS counter which counts the three overload conditions, after which the sys-tem has to be reset manually, by pressing push-to-on switch S1. the circuit can be powered from the inverter battery. In standby condition, it consumes 8-10 ma of current and around 70 mA with relay (RL1), buzzer (PZ1), and LED1 energised.

Please note the following points carefully:

Points A and B at the input of IC2 should be connected to the corresponding points (A and B respectively) across the ammeter.
Points C and D on the relay terminals have to be connected in series with the already existing ‘on’/‘off’ switch leads of inverter as shown in Fig. 1. this means that one of the two leads terminated on the existing switch has to be cut and the cut ends have to be connected to the pole and N/O contacts respectively of relay RL1.
The ammeter should be connected in series with the negative terminal of the battery and inverter, as shown in Fig. 2.Move the wiper of preset VR1 to the extreme position which is grounded. Switch ‘on’ the inverter. For a 300W inverter, connect about 250-260W of load. Now adjust VR1 slowly, until the inverter just trips or shuts down. repeat the step if necessary. Use good-quality preset with dust cover (e.g. multiturn trimpot) for reliable operation.the circuit can be easily and success-fully installed with minimum modifications to the existing inverter. all the components used are cheap and readily avail-able. the whole circuit can be assembled on a general-purpose PCB. The cost of the whole circuit including relay, buzzer, and PCB does not exceed Rs 100.

Sunday, September 14, 2014

Modifying your Auto Sound System

If you are one of the many people around the world who happens to be into cars and the new pastime called modding Im sure you have considered the implications of modding your auto sound system. For many the idea of modifying an automobile is very exciting. Its a way to take the standard canvas purchased from the dealer and turn it into a work of art that you drive to work and play each and every day. The same theory holds for your sound system as well. You can take the basic pieces and parts and turn them into something so much more than they were to begin with.

If that isnt enough you can purchase all kinds of LED lights and other nifty gadgets that glow and go along with your car while dancing to the beat. If you want to make a splash driving down any boulevard, this is definitely one way to not only be seen but also leave a lasting impression. Your creative genius with your auto sound system will cause quite a stir and give plenty of people much to discuss the next morning and plenty of people a great deal of inspiration to try to mimic or at the very least incorporate into their units somehow.

There are all kinds of sound systems for automobiles. Many of these systems are sold as part of a package and readily available to multiple consumers. You have the option as a creative modding genius, to take the plane Jane package and turn it into something so much better than it is or to even go off on a tangent and invent a total package of your own by mixing and matching pieces and parts from several different packages or pieces of packages.

It doesnt matter where your creativity ends and begins there is never a challenge too great for a true modder at heart. From cars, trucks, boats, and computers to car stereos there is no task too demanding or too complicated for a true modding mind to tackle and transform. Perhaps its the blinking lights or all the wonderful possibilities that abound but auto sound system mods are among my favorite to see in action. Its amazing the things that can be thought up by a wicked imagination and accomplished with a little time and a lot of effort.

Seriously though, if you are going to go to all the trouble of dressing up your vehicle shouldnt you also take the time to dress up your auto sound system? There are all kinds of gadgets and gizmos you can buy that will work with the music your speakers are pumping in order to create a fabulous overall affect of music and light that is sure to get some great reactions from those you cruise on by. These are perfect accessories for summer time beach driving if you know what I mean. Growing up on the coast, I found a great section of people who were constantly modifying their cars and sound systems. I think it is incredibly amazing what can be done with metal, glass, color, light, and sound and really enjoy seeing all of the amazing creations that are made.

Even if you havent really given much thought to modifying your auto sound system before, I hope that you will consider it now if you are a serious modder. I honestly believe you might amaze yourself at some of the fabulous tricks of sound and light that you can come up with when properly challenged and inspired.

Take the time to check out the interesting things that have been done, and then formulate a hypothesis on what can be done. It is truly amazing the wonderful things that have been created as the result of a glove being thrown so to speak. Jump in and create a fabulously modified sound system that will be the absolute envy of everyone you pass along the way.

Friday, August 22, 2014

Auto Sound Systems are Becoming Entertainment Systems

If youve been shopping lately for an auto sound system then I am fairly certain that youve come across several full entertainment systems among those in the running for your audio and entertainment dollars. Vehicles today offer everything from DVD players, individual speakers, headphones (also individually adjustable), and even dual players that will allow one different audio to be played in one section of the vehicle than another. In addition to all of these wonderful and nifty devices are many more devices that are meant to tempt, sway, and convince you to spend even more money on the auto sound system of your dreams. Some of these even offer MP3 players that connect directly to the audio system of your car, truck, or SUV.

The jury is still out for many people about the safety and sense of having a DVD player in your automobile. While this is the case, people will continue purchasing DVD players are part and parcel of their sound and entertainment systems and manufacturers will continue putting together attractive packages that offer these devices to consumers while offering incredible bargains on installation. I know that many feel that this is an unnecessary distraction to drivers. Im one of the rare people that feels that in a day of laptops, cell phones, talk radio, fast food, Starbucks coffee, and multitasking, a DVD in the back might be one of the best features that can be added to the car in an effort to minimize distractions coming from the direction of disgruntled passengers in the rear.

I will confess that many people wonder what this has to do with an auto sound system and I can understand that question so please bare with me. One of the features that sound system manufacturers are offering is a feature that allows individual headphones for passengers in the back along with LCD monitors that rest in the back of the head rests so that passengers in the back can both see and hear the DVDs being played without causing a distraction for the driver (either by noise or by means of flashing lights).

The truth of the matter is that having the noise from a DVD player in the back is no worse of a distraction than having disgruntled children competing for your attention from the backseat or listening to audio books as you drive along. I must admit that audio books are one of my current and readily admitted addictions. The problem with those is that on occasion some of the books simply arent meant for young ears. I try to keep my books limited to popular stories that are suitable for children whenever my children are riding along and save the sometimes steamy and often hilarious tales of Stephanie Plum for when Im riding alone. Another great reason to make sure you have an auto sound system that at the very least reads and understands MP3s.

The technology exists for this and I expect to see even more innovations technologically speaking in the way of auto sound systems and entertainment systems in the near and not so near future. We live in a world where technology is constantly evolving and we should see many new and wonderful features that will make our lives much more enjoyable for our daily commute.

Whether you are new to the technology of today, fighting it mightily, or happily embracing it-it isnt showing any signs of stopping or slowing down. This means that you will eventually have to face the fact that the old ways of buying an auto sound system will soon be obsolete. I often joke that we are rapidly becoming a society that is catching up with the "Jetsons" vision for the future. I also loudly lament my lack of a Rosie. At any rate, I am glad to see that the new technologies in auto sound systems are offering less of a one size fits all image and offering much more individual systems, even for passengers within a vehicle.