The system regards DSP56F826 chip as the key control module, uses the sensory chip of CMOS digital image, reachable 640* 480 picture element of definition that the picture is gathered. When needing the vision which carries on the high-resolution to be gathered, can use the chip cost will thereupon increase of 1024* 1024 picture element instead. D
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ecipher reliability is high. The bit error rate got at present does not exceed 1/60, 000, and is updating, expect the bit error rate not to exceed 1/20 million. Adopt RS-232 communication interface, upload the two-dimentional bar code information obtained to the display processing of the computer in real time. The grade of error correction reaches 8 grades, correction capability is strong. Two-dimentional bar-code scanner system block diagram such as Fig. 1 Shown. The sensory chip of CMOS picture is a photoelectric transition element, use and gather the two-dimentional bar code picture, direct output is a digital signal. Expanded SRAM by the outside and stored this data, and then send DSP, carry on image manipulation, one yard of word division, one yard of word recognition, signal error correction, etc. , after the recognition of a series of two-dimentional bar code information is finished, serve the I/O interface of program control and provide and stop applying for signals, DSP responds to this and stops applying, enters the interrupt service routine. The two-dimentional bar code data after the decipher are conveyed from I/O mouth to the computer by SCI RS-232, and reveal on the screen. Software program and PDF417 codebook are all stored in FLASH in DSP chip, and the two-dimentional bar code image data gathered dynamically is stored in SRAM. The system hardware circuit is mainly composed of seven parts: The bar code vision...
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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