Showing posts with label auto. Show all posts
Showing posts with label auto. Show all posts
Saturday, September 13, 2014
Power amplifier with load detection and auto BTL SE selection
Circuit Diagram:
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| Power amplifier with load detection and auto BTL/SE selection |
Friday, September 5, 2014
Simple Wireless Auto Tachometer Wiring diagram Schematic
Anyone performing their own automobile tune-ups knows how important it is to know your engines speed. With this tachometer, you can measure your engines speed without any connections or annoying timing lights.
Wireless Auto Tachometer Circuit Diagram
- Calibrate the unit as folows:
- Set up this schema:
- Turn on the Tach and allow a few minutes for temperature stabilization.
- Set S2 to 4 cylinders and adjust R5 for a meter indication of 180 (1800 rpm).
- Set S2 to 6 cylinders and adjust R6 for a meter indication of 120 (1200 rpm).
- Set S2 to 8 cylinders and adjust R7 for a meter indication of 90 (900 rpm).
- To use the Tach, turn it on and let it sit for one minute to allow for temperature stabilization. Extend the antenna, select the right number of cylinders and hold the unit over the engine. If the reading is erratic or the needle jumps around, move the antenna closer to the ignition coil or spark plug wires.
- The unit draws power from the car battery. If it is connected backwards, it will not work, but it wont be damaged.
Sunday, August 31, 2014
The Risks of Self Installation of your Auto Sound System
The risks of installing your own auto sound system may be greater than you realize. The fact is that there are people that are professionally trained in the installation and proper handling of these delicate sound systems for a reason. If it werent a difficult task they wouldnt be able to demand the rather hefty price tag that most installation centers charge. The problem is that mistakes can actually cost more than the installation. If you arent one hundred percent certain that you can handle the installation process alone it is best to leave it up to the experts.
To prove my point, I will give you my very own personal story of how auto sound system installations can go horribly (well, perhaps hilariously would be the better choice of words in my particular situation) of course. You see I wanted a CD player in my mini van about 13 years ago. This was back in the dark ages when these types of sound systems were still relatively new and on the cutting edge when it came to technology.
These types of auto sound systems were definitely not the norm as they are in todays cars. I was commuting 3 hours (round trip) each day at the time and some of the time was spent among the corn fields where there were no towers broadcasting radio signals anywhere nearby. Im sure you can see why I felt I needed a CD player. At any rate, my wonderful dear old dad installed my brand new car (well mini van) stereo for me and all seemed to be going well until we realized that the horn no longer worked and that in order to actually use the stereo, the headlights must be on (this was also before daytime running lights were the norm as well).
Now that youve finished laughing Im sure you can understand why I am a huge advocate for having professional handle issues of installation when it comes to auto sound systems. It isnt that my dad, whom I love dearly for the effort, was incompetent when it comes to technical matters, in fact, he is highly skilled in these sorts of things ordinarily, it is simply that car stereos are so terrible complicated that it takes more than merely reading a set of instructions in order to get the maximum effect from your installation endeavors.
I have heard horror stories, particularly related to in dash installations that have resulted in some people having to make serious and costly repairs to their cars in order to fix the damage inflicted by installations by those who either lacked the proper tools, proper training, or a little bit of both for installing auto sound systems. While some drivers dont spend all that much time in their vehicles on any given day there are many commuters who put many miles on their cars, trucks, or SUVs during the course of a week. For these drivers it is often very important that they have the best possible sound systems for their vehicles. They will rely on their stereos to find out about weather conditions, traffic tie-ups, news, and possibly even entertainment during their long drives. If sound and music plays an important role in your life, dont you deserve the best auto sound system possible?
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