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UPDATE Version 2: RGB clock (WS2812B) with DCF77
Hello,
today I come with one improvement of the clock. I decided to add an extra strip in order to use it as a separate display for the hour hand. The strip consists of 48 LEDs and is placed in the inner part of the ring. I have to admit I was...
Hi,
finally I decided to show my DIY. It is a clock based on RGB strip (WS2812B) with DCF-77 receiver and automatic brightness control.
1. Idea.
Since I was a child I wanted to build an analog clock using LEDs. However, I was too lazy to use multiplexers, port replicators etc. In December 2013...
Hi,
I need to interface lots of microcontrollers to a single Windows PC. How much - 100 pieces. All of them have UART, of course; but USB is not available. I was wondering if I can use 11 USB Hubs, each with 10 output ports connected in daisy chain.
PC
|
1to10 USB HUB
|
10x 1to10USB HUB
| |...
Hello everybody,
I noticed, my father's DVD/HDD Combo LG RH-387 makes some strange sounds after instertion of a CD/DVD. Moreover, no CD/DVD can be read or written. I opened the device, opened the DVD writer and I could notice, strange sounds originate from the optical assembly of the writer.
I...
Thanks Peter,
yes, this PCB comes from a portable gas concentration measuring device. This component is located below the LCD (old-type, monochrome display). The LCD can not lit, but maybe this piece controls if the backlight is turned on e.g. in alarming mode...
Any other ideas?
Hello,
I found this small (3,0 x 2,5 x 1,0 mm) component on a PCB. It looks interesting, since I have a feeling, there is a bare wafer on it. It has 8 pins and I can read the text on the wafer: "KAD SX". Please have a short look at the pictures. Do you have any idea what this component could be?
Thanks,
well I guess I know other programs as well to calculate radiation patterns, but I was wondering if one could say something like this:
If you need "feature_A" but the "feature_B" is not important for you, you should use the circular horn. Otherwise, take the rectangular-one. Is it...
Hi,
I went through some books describing antennas. Usually circular as well as rectangular horn antennas are considered. But what I'm missing is a simple thing - in which situation one uses circular horn, and for which rectangular - one? What is the comparison between those two types of antennas?
export hfss to 3d dxf
I have a problem with HFSS export to dxf.
My structure has a microwave stub (it has an arc). Unfortunately, after exporting it and reading with AutoCad, or ADS, the arc is very simplified - it consists only of 2 lines, so basically it is useless. Is it possible to force...
Hello.
Does anybody have any experience with the IC: U2531B?
I bought an infrared light barrier (a Conrad kit; produced by Kemo); the receiver is using that IC. I've read the instructions carefully, tested it twice, but there is a problem.
The receiver detects the IR light (that is T2 is on...
Yes, this I understand very well, but the question is: Why TI is going to remove it?! Sometimes, some parts are removed, because there are a better solutions, but there is no any alternative for 3584 produced by TI.
Gain will be set to G = 10 (the input signal will be in range +/-12V).
Can you...
bb3584
Hello.
I need to build an amplifier meeting the following requirements:
Output voltage: +/- 120V
Output current: 15mA
Full power bandwith: 10kHz
Slew rate: < 10V/µs
The Texas Instruments page returned BB3584 amplifier, but I see 2 problems here:
1. This amplifier is not recommended...
Well, currently I'm more interested in the second solution, although it may turn out it is not accurate enough. IanP, again thaks for your help, and small question, could you put here the second amplifier in a better quality, so the names of transistors, values of passive component are visible...
150v amplifier
Thank you IanP.
The circuit you proposed is a little bit complicated, but this is because of its high performance, i.e.:
1. High Voltage (±230V = 460Vpp)
2. High Speed (4100V/µs)
3. Relatively high output current (53mA)
My application doesn't need so high performance; I mean...
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