The large-scale LED display system adopts the line by line scan and lists the driving means to save the expenses of hardware, it adopt 1/16 it is non-interlaced scanning mode, LED display screens large-scales whole it last 16 pieces all right. The picture, in order to reveal the schematic diagram of the driver module. Each display module is that a
Click here to download the full size of the above Circuit.
small dot matrix of 64* 32 picture element is rejected, is divided into two parts, each 16 lines from head to foot, every part has 8 groups to list the latch of data. Upper and lower two part multiplex 1 4 the intersection of son and 16 the intersection of Decoder and U1, strobe, drive 1/16 line by line scan reveal, and need 16 groups to list to drive the latch to latch and list the view data. Adopt and run side by side totally, at the time of line data transmission mode, needing can list the latch to make to strobe with a Decoder U2s. Need to use the two-step latch to latch and list the view data in sunset when the dot matrix is broken, otherwise will reveal the tailing phenomenon. Expicity data store the second latch in this time, master control board write down party, want expicity data go on, list data, break rejecting the intersection of end and the intersection of first step and latch, party take after the expicity data transmission instantly, latch, get the second latch export and strobe, drive row display the next together. Adopt second latch of parallel bus under the way, still than competent to transmit, change with data into scheme economy of parallel output Zhyuan have. Reveal that uses and misplaces the cascade connected thinking at the time of horizontal cascade between the driver module, make it have good commonability and but embeddability. Use and misplace the cascade connected thinking, make the Decoder...
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: