had to rewire a boat trailer due to damaged wiring and lights. I`m using a standard 4 pole flat connection to my truck. The trailer is simple - two rear lights and nbo side markers. Both rear lights are grounded to the harness to the truck. Almost everything works fine. Turn on the headlights and the trailer lights are both on. Both
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turn signals work. When I have my truck lights off, the brake lights work fine on the trailer. This is a very common and classic problem. There is too much resistance in the ground or return circuit. The total current of the running iamps is small enough to keep the voltage drop across the ground resistance low enough to sustain the lamp illumination. As soon as the cold filaments of the brake lights are supplied with current, it drives the voltage drop across the return portion of the circuit so high all the lamps extinguish. The running lamps are illuminated. The resistance in the ground circuit is higher than normal. Let us figure the current for the lamp is 1-Ampere. The ground resistance is 3-ohms. This mean there is a 3-volt drop across the ground resistance. The lamps are receiving only 9-volts, however they do illuminate at this voltage, although at reduced luminance. So the trailer lamps are burning. Ww step on the brake. The brake lamps are designed to be brighter than the running lamps, so they draw more current. This means their filament resistance is lower, and when the brake lamps are off, their filament resistance is very low, practically a dead short. When the brake switch closes, the cold brake lamp filaments act more like wire than a lamp, and they drive the voltage drop across the ground resistance much higher, let`s say to about 9-volts. The voltage drop across the cold lamps is only about 3-volts. This...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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