led

Hello, I've been tasked at work to design a breakout box to test our "custom" instrumentation cables, essentially test the continuity of the pins, whilst being able to identify if a pin has lost connection (i.e. wire broken). We have two groups of cables, the ones that connect in the sensor's...

I want to have an LED light up every time there is an audio signal sent from a contact mic into a potamp and out to a jack. Theres a contact mic soldered to a guitar potamp which is soldered to the output jack. Is there any way I can (without the usage of a battery) solder an LED into this to...

I am doing this small project and I want to by pass the power button on the the device. I have it plugged into a half hot receptacle and want to turn it on with the light switch that controls the half hot receptacle. I am not familiar with circuit boards at all and not sure where to start. Any...

I am converting a 2008 Range Rover from filament rear lights to the later LED clusters. I have run into the following issue and would appreciate some help. The original lights used a 5W supply to provide the tail lights, increasing to 21w when the fog light switch was pressed. It is a standard...

Hello, I have this Forch LED torch circuit with circuit board number 1100017 and a burnt resistor. The character above the resistor read “R1”. Using a multimeter to measure its resistance its comes out to 1 ohm. Searched around the internet and someone suggested that the R Value of the actual...

I want to make an extremely cheap product with a speaker and two LEDs, the other components are no problem, but I need an IC that comes in a die form and I want to put a custom song to it, the IC must be a bare die, so I can put it in a Chip On Board assembly. The IC must not require an...

I bought a USB desk lamp. It has a power switch + 2 switches to increase/decrease brightness. But these buttons are hard to press, very slow to operate, and even the darkest setting is still very bright. I'd love to add a true dimmer switch, so I can quickly turn it on and set the brightness in...

Hello guys, I'm a student that really new to this codevision. Today I am here to ask some problem to a professional in this field. Yesterday our teacher give us a proteus project and the code in codevision about ultrasonic sensor. and showing the sensor value on the LCD on the right. And now...

Hello all, this is one of my first electronic schematics and I'm trying to make sure everything looks good (electrically) before I order board and components. Another set of eyes on this to criticize and give constructive feedback would be great and point out any issues or mistakes my circuit...

need a simple single Led flasher circuit that can operate from a 9v and 12v source. Thanks in advance.

I'd like to stick a tiny LED onto a strip of card to make a flashlight that doubles as a bookmark, allowing me to read wherever I am! The LED can be white or red, but must be nice and bright (I may use more than one). Plus it all has to be light and thin. My electronics knowledge is poor and...

I have 4 switches and 4 LEDs. I want to turn off the first LED with the first switch, the second one with the second switch, and so on. When I turn off the switch, LED should turn on. All switches connected to PORTA, all LEDs to PORTB. Initially, all LEDs are on. Will this code do the job...

Hello guys, I'm trying to make a led blink at 3 different frequencies, upon successive keypresses. My problem right now it's that it's only blinking 2 times and I don't understand why. D6 is LED, D4 is the test output. Here it's my main function: /*********************************************...

Hello, I want to build a smartphone camera rig that has LED lights built in that run from a USB power bank. I’ve attached a basic design to give an idea of what I’m trying to achieve. I’ve got no experience with electronics, but can (and have) follow instructions for personal projects. Can...

Hello Sparkies of the Internet, I am just a simple man of wood, with absolutely no experience in anything electric. I am however building a lamp for a project that I am doing as part of my course in Furniture Design and Manufacture, and I fear that I have made it slightly too complicated for...

Hi there! I have 12x 3mm LED's: - 6x flashing - 6x static To this I have a standard slide switch and cell battery holder. My issue is this: how do I link these 14 components to one another and ensure the flashing LEDs stay flashing and the static, static? I believe that a 6V battery will...

My view on life, in any field, is not to produce more but to consume less. Everybody told me this is a very eccentric weird mentality. Perhaps they are right. Nevertheless I have to build my project to make a highly efficient, extremely low drain, motion triggered 12V battery powered dimmable...

Hello, I am using an Arduino Uno for a soldering station project. I am powering the Arduino through USB port using a L7805 regulator and I saw that if I remove the USB power, the ON led still lights up when I am powering the soldering station. Also, the other led's are semi light up. The Vin and...

One Bit Switcher I offer my own version of the circuit of the switch 12v. led-lighting for the kitchen based on the dual trigger of the hc74 chip. Created with EasyEDA.

Guys, I need some help. I need to build a circuit, that flashes a LED 4 times (only 4x, in a short time, like less than 1/2 second), every time that i click a bottom (click switch). If you can draw me a circuit that may work, I'll be grateful (cuz I'm still learning circuits).

Hello, I would like to build a battery powered arduino gps speedometer. In this arduino based project I would like to include a few features. -I would like it to turn on some lights when It detects that the speed is going down (if the speedometer is going at 10km per hour and slowing down I...

I made a LED setup with blue and red LED that is supposed to help me with indoor planting. I used total 4 LEDs (2 Red and 2 Blue) for one pot of Portolaca flowers. But I think it is not simulating the sunlight properly. How many LEDs am I supposed to use? How should I make the connection?

I'm coming from a programming background and although I'm doing more electronics recently I'm still very much learning. I'm using a bluetooth module (this one **broken link removed**) It has an LED function but it's really annoying. It blinks quickly when bluetooth is not connected, and blinks...

Hello All, Thanks for having me in your group. Up front I am a disabled senior with no electronics experience at all and to old to learn much. I have always wanted to learn electronics design, repair, build ect. but never got the chance, I envy you guys and have a world of respect for your...

Hello everyone, I'm searching for help since electronics are not my field of study... I'm trying to build a simple project that requires an LED with a constant light output (the LED must be wired to a coin battery cell i.e. CR2032). When reading the LUX from the LED I can see the LUX decreasing...