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151 Threads found on Led Jpg
Pls i wrote a program to on an led when a pushbutton is pressed and off when it is realease. The program looks ok but when i simulated it on proteus, it wasnt working. The program is written in mplab. The code and circuit diagram are in the image. Pls hlp me out. obraz
Hello Friends, I am sure someone here must have worked successfully on 16*32 led matrix display; something like this...( ) . I have one of these led matrix (part number- P10(1R)706). Can you help me with the datasheet and its programming example or link where i can find them? However displa
led boards have usually PMOSFETs as row multiplexers.
This way its most cost effective method use 74HC595
Hello all, Just to be clear, I'm not looking for someone to do all the work of this design for me and this isn't homework or a school project, pokes on the right direction for me to work this out myself would be fab. I'm currently lacking the knowledge as to where to look to learn what I need to know to do this. I'm making a circuit to monito
Hello, If anyone experienced with arduino can help with this few questions. I want to build led lamp to put in my garden (I can buy something like this But I wanna build it by myself. Standard electronics for
Hi there, I have 7 segment common cathode display, each segment look like on attached image, 5mm red color I will use 12VDC to drive it, total 2 seven segment common cathode display, for countdown show...
hi, I want to design a constant current led driver with the following specs Vin : 90VAC - 300VAC @ 50Hz vout : 30VDC to 42VDC Iout : 1400mA PF : >0.96 THD : <10 Eff : >85% Surge Protection : 6KV Protections. Open Circuit Protection, Short Circuit Protection I need help in topology selection (i think fly back will work). How can i
hi friends i want to use micro. pic 16f676 for dimming purpose of 20w cob led with 12v dc, is it possible with this micro? please help me. i have proton plus compiler. thanks in advance,
Hi all, I am using this it doesn't detect when connecting with the system,even the led not glow.When i check this usb pins its got short but i think its a
How High can you do hand waving descriptions :roll: without a requirement or a comparison is one example of an 6x3 array of XL Cree ledS on ALum-clad PCB powered by one of my surplus wall transformers 20
Here is a circuit that uses a quad opamp )almost any quad opamp can be used) for the filters and rectifies the signals before transistors drive the leds. Notice that the leds are in series, not in parallel. leds each have a slightly different voltage, unlike light bulbs. Then when in parallel the led with the lowest voltage (...)
Hi Everybody, I would like to make a soccer substitution board circuit with led. I don't want to use microcontroller. Pls give me any
Buy a solar garden light and disconnect its solar panel or cover it with opaque tape. Most come with a single Ni-Cad battery cell. Most still light an led when the battery voltage drops to 1.0V.
You don't tell us what kind of leds you are using: back to back? common anode? two separate leds? Maybe something like this would work... (D3 should be a
want to take the field Digital inputs using opto-coupler 4n35 as i have show in the above schmatic. But such arrangement is not working with Atmega8 in the Real hardware. I don't know the reason...actually when i check with multimeter. when the led source is on the PIN5 reads 60mv and when the led so
Here is a simple way to do the job, with a power supply of 3V. Throw the switch, 2 seconds go by, then the led lights briefly. The scope trace shows the time frame is 2.2 The switch must be turned off after
I think what Mohamed Saa is asking for is a utility to convert an image rather than font characters. For example something that converts a jpg or PNG image into the flash sequence for a rotating led display. As far as I know there are no programs available to do this, it is a rather specialized thing and probably needs coding for each different PO
Hi All, My first post in this forum. This monitor cannot power up. External power supply is confirmed OK. I have been searching for a replacement mainboard at Ebay but no luck. What could be the common cause of failure for this monitor ? Thanks in advance.
Hi for all Dose Transfer Function equations is correct? I want to design led Driver based on L6562N and TSM101AC but i have 2 problems: 1. OVP dose not work at NO LOAD! 2. Output voltage ripple is very noisy! I think reason of problems is transfer function! obrazki.elekt