AC power is rectified and applied to the motor in the same polarity when the momentary switch is held in one direction and reversed polarity when the motor is held in the reverse direction. The remote car starter package that I used includes a control unit, an extended range receiver, a status LED, a valet switch, and four wiring harnesses. In thi
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s application, much of this is not needed and can be discarded. All that is needed is the control unit and extended range receiver. The receiver plugs into the control unit with a supplied cable. I made only 5 connections to the control unit: power, ground, unlock, lock, and trunk. The latter three connections are outputs, and in their default configuration act just like momentary switches to ground. For the PLC, I`ve chosen an E10-npn model. The npn designation refers to the PLC outputs, which are NPN transistors switched to ground. A relay output model is also available, but not suitable, as the relay outputs are single pole only. I need at least double pole double throw relays to switch the lift motor polarity, so I used external relays. The radio receiver outputs, which are switches to ground, match exactly the inputs of the E10-npn. I connected these directly. I also wired the panel switches in parallel so that I and the service company personnel can operate the lift without the remote. My up and down position limit switches will also be simple switches to ground (I have these on hand but have not yet installed then). As the PLC inputs are low voltage and low current, safety in the case of a short or exposed wire is not a big concern. (Note that a short on the limit switches will cause operation to stop, which is a good fail safe mode. ) In place of the original momentary DPDT switch, I substituted a pair of relays...
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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