To make your own PWM controller, start with this sawtooth generator. Run it from a 7. 5V regulated supply to make its Vpp 5V. Feed the sawtooth to one input of a comparator and the MAP voltage to the other input of the same comparator. Let the output drive a MosFet transistor. Hi, thanks for the replie, I`ve found this wiring diagram for the sp
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eed controler, I`ve drawn on a schematic diagram of the MAP sensor, I`m looking to get the speed controler to increase RPM of a electric motor in step with the air pressure sensed. Having replaced the trimpot with the MAP sensor, the load( in this case a 12v bulb) is shining quite bright with no air pressure applied- when air pressure is applied the bulb shines slightly brighter. It may be helpful if you explain what exactly you are trying to do. I strongly suspect that there is a flaw or a misunderstanding in your project several steps earlier than the motor controller. All the turbo charged cars I`ve had in the past (ok, only 2) have had a fuel pump that provides a far greater flow than required with the excess being returned to the fuel tank or shunted around the pump via a pressure relief valve of some sort. Sounds like you trying to turbocharge a NA (normally aspirated) engine. Even though this is not an engine forum, you really need to provide the big picture for people to really help you. Incomplete questions will get incomplete answers that will leave you chasing your tail. As for the MAP sensor, pressure sensors produces a voltage proportional to the pressure plus a constant offset. So at vacuum, the sensor may produce 0. 5V and at 30" it may produce 4. 5V. If you have a turbocharger that boosts the manifold pressure to 45" your sensor is only going to give you a little over 4. 5V because that is all it is able to...
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....
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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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