Wondered how to control the MR2 Power steering pump so that it is not a noisy power hog because it ’s always on full throttle. Designing some sort of motor controller or using a small off-the-shelf controller would not work for me. One, I ’m not that great of a designer of controllers (I ’ll leave this up to Otmar). Second, a small of
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f-the-shelf controller would not work on high voltage systems. Plus, I would have to program some type of Micro or Basic Stamp to get all the functions I want. So I decided to get the original motor controller from a MR2 at the junk yard and try to wire it up. Well, it works better than I anticipated. One of the modes of the MR2 controller is to slow the hydraulic pump to a stop when there is no movement of the steering wheel or vehicle road speed: saves power! I have also wired it to enable itself when the Zilla Contactor is engaged. I`m using the original steering wheel sensor from the MR2, so it senses how much steering I`m applying. It is also getting road speed info from the cruise control speed sensor to limit over-steer at high road speeds. It uses the sensors in the pump to tell you when the brushes are worn or overheated. The P. S. schematics provided are from a ’94 and ‘95 MR2, so try and get all the parts from a Toyota close as possible to these years. There are a couple different versions of the schematics here, so use the one that best suits your needs. 1. I used the original cruise control speed sensor for my ’85 S10 to drive the ECU and it has worked with good results. Your results or pulse rates may vary. 2. The ICT (PSCT) is a control wire for the main engine ECU to enable the P. S. when the engine is running. The P. S. ECU is disabled when this wire is brought low (grounded). So I used a micro-sized relay...
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....
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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....
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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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