Detailed method and secret of making monochrome LED display screen
Time:2018-12-01
Views:1071
How to make monochrome LED display?The following derensel share the production of monochrome LED screen detailed method secret!
Step 1: material preparation
1. Part of the outer frame: special aluminum profile, corner, light steel keel, rear baffle (aluminum plastic plate, European pine plate is ok)
2. Display part: unit board.Accessories include: wiring power cord.Hello monochrome LED screen production process (picture) installation forum
3. Choke part: choke card, adapter plate and wiring.Note!(individual choke CARDS do not need to transfer plates and wiring)
4. Power supply: 220v-5v power supply.The usual ones are 40A, 30A.The starting working condition depends.
5. Accessories: 16P line, 16P clip and clip, three-core number value line, DB9 head (needle, hole) DB9 shell, power cord, self-tapping.Strong magnet (pillar and magnet)
6. Tools: cutting machine, pressure pliers, electric soldering iron, wire stripping pliers, screwdriver.
Step 2: assembling the LED display
Make a good display first to confirm the volume of the outer frame, below I explain to you all the way to cut the border.Take the most commonly used 3.5*90 profile and P10 unit plate as examples.The size of the display screen is 2 *5 pieces.
1. Confirm the size of the unit plate to be very accurate to mm.Take the P10 panel: its size is 16cm*32cm.
2. Calculate the net size of the height and width of the panel inside the display screen. For example, the height of 2 *16cm=32cm wide is 32cm*5 =160cm
3. Subtract 4mm from the calculated net size. As mentioned above, the net size is 32cm*160cm, so the aluminum size should be (32cm-4mm) * (160cm-4mm) =31.6cm*159.6cm.31.6 and 159.6 are the actual size of aluminum, and 5mm shall be deducted if the display screen exceeds 3 meters or more.
4. Self-tap and sign the corners and sections, thoroughly tidy up sundries, and place them face down.
5. Put the unit plates in the right direction.Where pins are inserted, be sure to face the height of the section.
6. Remove the magnet for column loaded on the cell plate and the disk broadcast into the nursery in the column of concave 巣.
7. Measure the length of light steel keel and cut, put on the absorber, try to make the absorber in the center of the keel, avoid deviation from the distance.
8. Connect the keel with self-tapping and border.
9. Connect the unit board with the line to form a bridge, and do not let the line be buttoned.
10. Fix the power supply to the appropriate position inside the profile, according to the following said to really recognize where the power supply, power supply is generally placed on the profile under the exposure screen.Pay attention to insulation from the panel.
11. Power cord, power cord can not be confused with the signature, exposure screen is low voltage office, but the current is very large.The full current of a P10 panel is 4A, which means that a 40A power supply can carry 10 panels.The circuit of the exposure screen is in parallel, that is, positive pole to positive pole, cathode to cathode, ordinary VCC,+5V,+V is positive pole.GND,COM, minus V is the cathode.And the positive cathode must not be connected incorrectly, otherwise the unit blackboard will be scrapped.Example: a 40A power supply with 10 unit boards, we can be divided into three and together to the power supply of 5V once, and then three and three to the power supply last time, and finally four together to connect to the power supply.That is to say, there are no more than 4 unit plates per circuit, so that the damage of the line will not be caused by excessive current.
12. Put the choke card on the input end of the unit board, and be sure to supply 5V power directly from the power supply.
13. The pins of the choke card are arranged in sequence.Such as JK1. JK2...Or J1, J2...JP1, JP2...The position of one needs to be cosigned to the top panel of the arrow at the input end of the panel.
14. Signature of the element plate and the choke block: the common choke card pin 1 has A small white letter A around it. The input end of the element plate also has such characters.
15. After the above work is done, the sundries inside the screen must be thoroughly organized and tidy, so as to avoid the loss of conductive aluminum, iron and wire ends into the circuit board.
16. After finishing the work thoroughly, power on the test, the premise is to do a good job in the numerical line.Because most of the digital control business card printing before changing the value is abnormal.So meet after the power show mixed and disorderly symbols, dark, bright, and so on...Don‘t be nervous, as long as you make sure that the cathode is not connected to it.
17. Numerical line welding: only two of the three below are used for ordinary display screen.Extension cord: this is required for every screen.As the name implies, its utility is to extend the numerical interface of the choke card out of the display screen.Because your display screen is bound to end up with a back cover, you can‘t change the data once to remove the back cover!The materials he needs are: one section of three-core wire which does not need to be very long, one DB9 needle and one DB9 hole.The welding place behind each DB9 is marked with digital 6789, so we only need to sign three of them.These three are 235. Weld the 2 of the needle and the 2 of the hole with one of the three core wires at the other end.Three and three burn and five burn and five burn.After that, put the shell on the end of the needle (because the hole is in the screen).
The disjoint two lines are the same as the welding method of the extension line. The difference is that the disjoint two lines use two DB9 holes and both require gluing shell.Crisscross line and the material of disjoint two straight line same, difference is crisscross line 2 connect to another 3 go up 3 connect to another 2 go up, 5 still connect 5. Also need two glue shell on the head.
18. Staggered lines and two lines that do not intersect are voted on using strangle CARDS that are parallel and still interlaced.
19. After completing the above work, the rest is to adjust, on the premise that the display screen must be switched on.As a result of the market choke card category is very much adjusted I will not introduce.
20. After adjusting the test, 2-5 days later, if there is no problem, the back cover can be cut off and sealed.We can deliver the goods at last!
Project of making LED display note:
1. The unit plate and the choke card must not be connected to more than 5V.
2. The positive cathode of all the lines must not be misconnected.
3. The sundries in the screen must be cleaned thoroughly.
4.220v ac does not divide the positive cathode, power supply in series do not break!
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