Does anyone here know where I could get a Longtek 6052 X-S, as mentioned on these websites?
Are there any alternatives to it that works with my...
Hello everybody! In a small project I have a LED flash that should light up synchronized with a sound being played from a micro board when a button is pressed. So far I have realized that without a problem. Only thing is, that LED will lighten up instantly, while the sound boards needs half a...
I have a general question, but it refers to a specialty brand. Im looking to redo an LED "Wall" which is just a bunch of rolls of ribbon on some thin plywood painted white, that's about 18" back from some large pieces of milk plex to create a "wall of light". I plan on redoing it with this...
It is my first time creating a PCB using Easy EDA, and I would like to add two RGB LEDs to my PCB. I am a little bit confused as to how to wire it. This is what I have now:
I understand that to control the color of the LED, I need to send a different PWM duty cycle to each of...
I am a compulsive DIY’er. Took electronics in HS many years ago.
My wife has solar charging LED mushroom lights. One light failed, wired in parallel. I purchased a 5mm 20mA white light and soldered it in place. Colors are a lot different. Old light is a yellowish white light and...
i have a uv a led with the following specification
optical watt 0.103W
beam angle 15 degrees
distance from surface 2.4cm
also the circle created by my calculation is 0.313 cmsq
is the irradiance 0.103/0.313?
i have attached spectral result test if that helps
I’m working on a project that requires about 7 discrete LED’s. I’ve always just used a dropping resistor in previous projects. For this project I wanted to try to use a driver instead. I ended up getting some Diodes Incorporated BCR421UW6-7 linear drivers to test with.
I bread boarded them...
I have an issue with a very simple small board I designed in EasyEDA pro (I'm a novice so if the answer is easy, my apologies). I'm not sure I correctly connected the MOSFET in the schematic. Reference to Datasheet: https://atta.szlcsc.com/upload/public/pdf/source/20140314/1457707013919.pdf
VXO7805-1000 DC to DC converter supplies 5V.
When the circuit is attached via USB, there is a voltage drop to 4.5V on the 5V pin of the ESP32 (DevKitC-32D and pinout).
I tried adding a 10uF capacitor between ground and EN (RST) as mentioned here. I then tried 330 uF. No luck.
This seems to...
Hello everyone. This is my first post on the forum, I am currently working on a seemingly simple circuit. I think a constant current driver is the solution; after wiring everything up last night the LED was nice and bright and circuit ran great. I decided to charge the Lipo over night, and when...
I'm pretty new to all of this, so please let me know if something doesn't make sense.
I am building display units with LEDs in them, powered by a 5v USB C to make it easy to disconnect and cable manage. I would like to put a USB C port on the left side of the unit, as well as another USB C...
For the purpose of ESD training, I am searching for some component to clearly demonstrate ESD damage. From my internet search, I have found that LED specifically white should be a good candidate. LED is also nice to clearly visually show the damage, color doesn't matter.
But I have tested some...
I have some questions regarding my implementation of IR LED detection with a phototransistor.
The main idea of the circuit is to make a circuit with incorporating a phototransistor, which will create a 0-5V signal on its output whether it detect IR LED presence. IR LED will be...
Hello all ,
I have this circuit that supposed to light a specific led when varDC/DC is 20V
And another led when varDC/DC is 15V and so on ..
My question is , why do I have to add the mosfet and the voltage divider at the exit of the comparator (the red mark)??
it seems to me that I can...
I am trying to build some underwater lights for my boat. I am using 10 pcs of 3W RGB 6 pin leds in series and i have tested the output. I am currently using a constant current constant voltage driver.
I would like to make a pcb capeable of driving the 10 leds and controling them with...
I have encountered an AHC244 chip used to drive LEDs (Something like in the attached image) so I wondered why not just drive the LEDs with the uC pins?
And also I have seen this IC used with some PWM signals as inputs to it! in this case, I am guessing the output would be the same...
When I load this code into ROM and execute it on my 8085 based computer, it works fine. The LED connected to the SOD (serial output) lights and goes out:
MVI A,C0 ; light the LED
MVI B,FF ; load the delay count into the B register
I love colorful LED light strings. I've been wanting to hand some around the house and finally got around to it.
I purchased a few that seemed high quality on the web and hung them around the house. The lights worked well at first, however they soon began malfunctioning. Basically the...
I designed a simple circuit for LEDs with 5V 1A.
This is the schematic, all resistances are 8.2Ω.
But when everything is ready and power 5v 1A at the input. I catch it is only 0.3A on my multimeter. It should be (5.0-3.3)/8.2*4 = 0.83A. Why is there such a big deviation?