With the wide application of SMT technology in products such as the computer, network communication, consuming electron and car electron, etc. , the assembly of the electronic product prones to complicating, high precision, melting and multi-functional intensively, the accurate test tactics can help the manufacturer to raise the efficiency, produce
Click here to download the full size of the above Circuit.
the qualified products; Meanwhile, introduce testing in product design, equipment investment, making and quality assurance course that can also lower costs effectively. Therefore, test has already become the indispensable important links in the manufacture process of product design. Have made detailed introduction in design that this text is directed primarily to the circuit automatic test system of control panel of the shoe cover machine. This test system divides two major module to make up: Upper computer and lower-position unit. The upper computer mainly means the PC, edits a operation interface on the PC with VB language, operate interfaces and include the real-time status, pilot lamp of the state, record data window which starts the command button, input signal. What the lower-position unit refers to is mainly that one measures circuit board and peripheral excuse apparatus. The detection circuit regards the TC12C 5608 one-chip computers of series 51 as the core, it including communication channel module, power supply module, examining in the circuit of acquisition of signal. The lower-position unit can imitate the required sensor signal of the control panel and gather analyzing its functional block diagram of hardware of the control signal of the electrical machinery of the control panel is shown as in Fig. 1 mainly. STC12C5608 one-chip computer main performance has the following several respect: High speed: A clock /...
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: