After the battery is clipped, because the movement of touch stick will make the light source shine to photosensitive tube, and produce light current, the first level 3DG6 turns on, the emitter outputs signal, the singal is coupled to back level by 10 F capacitance, Schmitt circuit is triggered and flipped, it outputs singal to control the gate ci
Click here to download the full size of the above Circuit.
rcuit. (View) The principles of circuit: the power grid is connected to 3 foot of transformerB by switch, J1`s normally closed contact. R1 is sample transistance, the control circuit is composed of BG1, BG2, it can change the control point by adjusting W. When the power grid is lower than 220V, J1 normally closed contact changes the transformer B into boost type. If the output voltage does not exceed 220V, J2 normally closed contact connects to transformer 5 foot. If it is higher than 220V, J2 pulls in and connects to transformer 4 foot. If the power grid is higher than 220V, it controls J1 to pull in by R1 sample, it is connected to transformer 5 foot, then it willform buck type. If output terminal voltage exceeds the set value, then to control J2 pull in by R4 sample, the normally open contact is connected to 4 foot. The selection of components: regulator power depends on the transformer iron core section and enameled wire diameter. The iron chip can use 19G—(24 ½ 25), the coil adopts 0. 27~0. 35 high strength enamelled wire to close winding, it should not use packing paper between layers. 1~2 should go around 48 turns, 2~3 should go around 822 turns, from the third foot it uses 0. 41~0. 51 enamelled wire, 3~4, 4~5 all go around 85 turns. BG1, BG3 chooses 3DG small power tube, BG2, BG4 use PNP silicon middle power tube. There is no special requirements for resistance capacitance. (View) The functions of this circuit are:...
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.....
characters left: