Circuit, the diode VDi, f Pooh is used to stabilize VTi, VT2 base bias, so that when the supply voltage in a certain range, VTi, VT2 a more stable quiescent point. If there is
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a temperature change at the same time, since the two grant tube PN junction transistor PN junction temperature changes and changes in the same direction, can play a role in compensation, protection temperature stability of the circuit. C1, R7 and C2, who constitute the input stage bias strip of filter networks to reduce hum noise input circuit. Experiments show that the circuit access or not, the effect is quite different. VTs ~ VT8 constituting the composite quasi-complementary push-pull output stage, has been adjusted so that the static Jo /C4, therefore, in the absence of the letter when, and outputs the tubes are in the OFF state, that is pure B state. When a signal is output VT3, VT4 the form of a current applied to the VTs, VT6 base, thus avoiding the post due to the transistor input voltage dead zone caused by the distortion. Circuit debug: two people are the power multimeter a string, a string of people between the output terminals and the speaker will RPi rotation to ground, build) 2, RP3 maximum resistance to rotation end power. While adjusting RP2, RP3t and adjusted so that the process has remained the string table in the output circuit current reading is zero. When adjusted to supply current table is 2- 2 5mA to o
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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