coll circuit

Showing posts with label car. Show all posts

Wednesday, June 12, 2013

Car Camera Automotive Display Ehicle DVD Integration Navigation And Portable GPS

There are generally two cases in using car camera with car display, one is the 3.5-or 4.3-inch screen, as long as it has the video signal input, the display will automatically turn on the display board camera images, the other is seven inches or more of the car displays, such displays are generally two-way video input AV1 and AV2, AV2 is usual with the camera, and AV2 have to need a dedicated power line triggered, generally the screen would have connected to switch to AV2 picture to a trigger signal to automatically switch power, just a video signal does not have to automatically switch to AV2, it must be plus a power signal. such as in the use of reversing camera, the trigger signals of AV2 display power have connected to the reversing light power after connecting video cable with display, so that reversing the screen will switch to AV2.
Off-board display is usually the case, after the reverse gear mounted camera will automatically display the picture, Another point to note is that there are some large-size display (10 inches or more of the liquid crystal display, etc.) can not the normal car camera shows the image, because the resolution of the camera will display a minimum resolution of the image does not reveal if switching to 2.4G wireless video transmission to be displayed, because the cameras image through 2.4G wireless video Mediation can be displayed.
Car camera with one car DVD navigation use: generally the case in the boot, but also have a power signal to switch to trigger the camera screen.
Car camera with a portable GPS navigation device: Generally in the boot, automatically switch to the cameras screen as long as the video signal input, no external power supply signal is triggered.

Sunday, May 5, 2013

Car Temperature Gauge

The Car Temperature Gauge is basically the same circuit as Marchs project with some minor changes to the input circuit. This circuit will display the water temperature to 1 degree resolution.

Friday, April 12, 2013

Simple Car Battery Voltage Monitor Circuit

This circuit is used to monitor the battery voltage to show a twin-colored LED standing of the battery to. If the LED “green”battery voltage exceeds eleven.9 volts. If the yellow LED, battery voltage 11.9 to 11.5 volts. If the LED is “red” If the battery voltage beneath 11.5 volts. You can after all trade the set off factors with the support of the trimmer resistors and / or altering the value of the resistors in the divider.

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A dual op amp is used as a comparator. The inexperienced LED on the board, except the voltage exceeds 11.5 volts. The crimson LED illuminates when the voltage falls below eleven.9 volts to the circuit. Therefore, in the 11.9 to 11.5 volts, both LEDs are on, producing a relatively yellow colour. When the voltage falls below 11.5 V, the inexperienced LED, and now only the purple LED flashes to point low voltage.

Electronic Parts List
R1=1K2
R2-3-4=680R
R5=15K
R6=10K
R7-8-9-10=1K
IC1=LM324
D1=5V6 /0.5W Zener
D2-3-4-5=LED
RV1=10K trimmer

Is really helpful that multi-shaper for V1 and V2. Muti-trimmer makes it a lot more straightforward to trigger points to make as a inexpensive single-turn trimmer. The trimmer can be totally eradicated when you have get right of entry to to a range of 1% resistors and has had calculated carefully. You would additionally need to present more correct reference voltage as the widespread 78L05 regulator.

Friday, April 5, 2013

Car Head Lights Turn Off

This circuit when setup in a car automatically turns off the head light after a preset time after the ignition switch is turned off.So you can walk out easily from the dark garage in the light of your car.
Circuit diagram :

Car Head Lights Turn Off Circuit Diagram

When the ignition switched on first the voltage from battery is fed to the relay through diode D1.When the ignition switch is turned off it produces a negative going pulse at the pin 2 that triggers the timer. The output of the IC goes high for the time set by R1 .This makes the transistor Q1 to conduct to energize the relay to drive the headlight.After the set time the light goes off.With the value of components used you can make a setting from 10 S to 60 S.
Notes :

Assemble the circuit on a good quality PCB or common board.
Fit the potentiometer on somewhere on the dashboard so that you can easily set the timing.

Source :circuitstoday

Thursday, April 4, 2013

Auto Sound Systems are an Investment in your Car Make it Great

For those who love tunes and the ability to take them along wherever you may roam, there are some great auto sound systems that allow you to basically plug in your favorite tunes to play as you go. It doesnt really matter which style of MP3 player you use, most of the newer auto sound systems at least have the ability to read and translate the material from these players into great music for you to enjoy on your ride by simply plugging your MP3 player into the car stereo.

Many of us find that lugging around an MP3 player with all of our favorite tunes (or at least most of them-with up to 40 gigs of hard drive space it might take a while to fill completely) is much easier and more practical than attempting to lug around a huge case of CDs. It is also great for those of us who find ourselves disappointed when we purchase CDs only to find that we really only like one or two songs. Now we can simply download the songs we know and love while avoiding those we are uncertain about or at least waiting until more songs come out before deciding whether or not to purchase the entire collection of songs. Having an auto sound system that allows you to enjoy the convenience of simply plugging in either your MP3 player or a memory card or stick in order to have your favorite songs at your finger tips at all times is fantastic.

I dont know about you, but I am absolutely hooked on audio books. I love to read and find so little free time in which to get my feel of the latest and greatest best seller. Audio books allow me to hear the stories Ive been eagerly awaiting at my convenience and in my SUV as Im making my daily commute or running errands. These books are also a great way to enjoy long car trips. You can even check your local library in order to find an excellent selection.

I typically try to find stories that might interest the children on long car rides as well (such as the Harry Potter books or The Polar Express). This instills a love of reading in them and I dont have to worry about the stray grown up word that some audio books contain. Good auto sound systems not only play great music but also sound wonderful when it comes to the spoken word as well. This is not only true when it comes to books on tape, CD, or MP3 but also talk radio and national news stations as well.

When you begin your search for your next auto sound system make sure you consider all the possible features you may wish to include. You can find sound systems today that include GPS, DVD players, navigational tools, CD players, MP3 players, satellite radio receivers and countless other nifty features. Choose the auto sound system that will suit your needs and interests best and enjoy it for as long as you can. A good sound system is something that will stay with your car, truck, or SUV so it is best to make that particular investment long before you plan to trade your vehicle in on another. At the same time a good auto sound system can be an excellent incentive to hold onto your vehicle a little while longer.