You are currently viewing SemiWiki as a guest which gives you limited access to the site. To view blog comments and experience other SemiWiki features you must be a registered member. Registration is fast, simple, and absolutely free so please, join our community today!
Hi, folks
I know Koetsu recently came out with a new step up transformer. Has anyone heard it and if so what did you think? Which cartridge did you use? Or can a step-down transformer be used as a step-up transformer? (which comes from this)
Thank you in advance. :)
Thank you for all your replies.
We'll have to see temps, battery health and safety mostly. I just realized, if you can charge the phone from 0-100 in 8 minutes, the problem fixes itself... It literally doesn't have enough time to heat up 😂!
Hi, all
The last week I've bought a new phone. Not surprisingly, it came with Huawei Quick Charge adapter (Li-Pol 3300 mAh battery). Although it charges from ~10% to 100% for about 1.5 hours, I consider that this might be bad for the battery than the regular charging.
My previous phone came...
Hi all,
Is anybody have a lead on a laser displacement sensor with a range of 100mm or so that can trigger a digital output when it encounters a rapid change in distance?
I have a CNC Router type machine that needs to find the edge of material that is set on the table quickly. I am hoping I can...
Hello, all
I'm testing coupling caps for DC volt leakage. The amp is a '58 Princeton and is powered up with a signal generated, the tone and volume controls are at mid level. All of the filter caps have been replaced with new F&T's and the amp sounds fine but I'm curious if I need to be...
Hi, folks
I propose to install a Samsung F3 1TB sata hard drive in my XP Pro computer. The motherboard is an Asus A7N8X Deluxe with revision 1 sata connectors. Will the Samsung hard drive be compatible with the sata revision 1 connectors on the motherboard?
I have heard that I might have to...
Hello, all
I am using the Zynq Ultrascale+ MPSoC on a custom board and have an 8bit NAND Flash memory to boot from. When I try to program the Flash using the Vitis Program Flash Memory tool I am able to measure the CE pin and it does go low and high so I believe the tool is trying to program the...
I know any device used to lower the power to the lamp would need sufficiently high enough power rating. Here pot as such generally are rather low, perhaps 1/4w and not suitable. :(
Hi, folks
I need a recommendation for a potentiometer.
I have an old 8mm projector that uses a 8v 50w bulb. The bulb works off a simple on/off switch. I would like to insert a potentiometer inline between the transformer and bulb to vary the intensity of light the bulb generates.
Even if I read...
Thank you all for the replies. Maybe I need to look up the data or measure the transistor for gain. One fact must be recognized that most transistors are made by many different manufacturers, and some transistors of one type have a different connection layout.
Good day, all
I'm kind of a newbie with electronics but I do know some how to differentiate the two. But in this there aren't any of the common markers. If I had to guess it would be NPN from NPN Transistor Arrangement and Symbol Basic but I can't be certain. If someone more experienced could...
Thank you for sharing ideas..
If I just use big enough resistors, it'll still work? If I use 10k in resistors, I'll get about 6mA, at 60V would be 360mW across the LED, wouldn't it? Or would it be 360mW split across all the resistors and the LED?
Hi, all
Recently, I have a system running at 62V max, 54V nominal based on voltage divider formula. I wanted to have a little alert LED, so I was thinking about using 10, 1kohm resistors, and adding the LED bewteen the 9th and 10th (or 1st and 2nd, if it matters), to get at most 6V and just a...
Good day, all
I’ve read this note RC Low-pass Filter Design (Sample) to design a a low pass filter for converting 120 VAC to 0-5V to input as analog into the arduino.
Attached is the filter I’ve got on the bread board now and it isn’t working and I can’t come up with where I’ve went wrong.
The...
Hey Guys,
I'm looking for some advice on a analog to digital converter applications. Recently, I have write an tech note about ADC (What is the Use of Analog to Digital Converter?-If there is any mistake, please leave me a comment, thanks!), and I need some examples of using ADC and the...
I would like to know if there is a way to measure the current of a normal 12V dc motor.
I am using a DRV8838 and an Arduino Nano.
I want to use it to stop the motor once a specific current draw or load is reached, if the motor is about to stall.
Is there any ideas of it? if possible a simple...
Using a microcontroller, this will average packets of 20 values each. Another is a moving average (or rolling average), which will give an output for every input, also averaged over e.g. 20 values. Is that right?
Hi,
I would like to read a sensor (acs712) a number of times (20), add them all up, then divide them by the number of reads. So I can get an average. to give me a sort of analogue "debounce". Am I guessing the sum function?
I sincerely appreciate any advice you can all give me, I'm incredibly...
By definition, the diode clipper, also known as a diode limiter, is a wave shaping circuit that limits positive or negative amplitude, or both. A circuit which removes the peak of a waveform is known as a clipper. While a half wave rectifier is a type of rectifier which allows one half-cycle of...
