The cooling is not only a PC using a small fan with an electronic commutator [1]. A special feature of these fans is that their removal is less dependent on the load. Indicators monitoring the DC component of current may therefore be very reliable. Interesting connection indicator I found in Electronic Design magazine [2]. The indicator in Figure 1, the only change in passing current. Measured current waveform is the fan in Figure 2 The voltage at the base of the transistor is filtered by resistor R1 and capacitor C1. The immediate changes in the supply current (during the fall) opens the transistor and discharges the capacitor C2.
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If he stops the fan, the voltage on the base and emitter of the same transistor and remains closed. Capacitor C2 is charged and logical level H output indicates a fault. Initial involvement was not accompanied MAX6501 circuit for indicating overheating. Serial sensing resistor for the fan normal PC too little resistance. For most fans meet resistance 12 ohm. Some fans, however, show only a small ripple current, see Figure 3 In this case, the resistor further increase. The cooling is not only a PC using a small fan with an electronic commutator [1]. A special feature of these fans is that their removal is less dependent on the load. Indicators monitoring the DC component of current may therefore be very reliable. Interesting connection indicator I found in Electronic Design magazine [2]. The indicator in Figure 1, the only change in passing current. Measured current waveform is the fan in Figure 2 The voltage at the base of the transistor is filtered by resistor R1 and capacitor C1. The immediate changes in the supply current (during the fall) opens the transistor and discharges the capacitor C2. If he stops the fan, the voltage on the base and emitter of the same transistor and remains closed. Capacitor C2 is charged and logical level H output indicates a fault. Initial involvement was not accompanied MAX6501 circuit for indicating overheating. Serial sensing resistor for the fan normal PC too little resistance. For most...
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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