-
6 days ago | 
allaboutcircuits.com | Luke James
In a milestone development for high-density electronic packaging, OKI Circuit Technology has introduced a 124-layer printed circuit board (PCB), the highest known commercial stack height for semiconductor testing applications to date. This advancement pushes beyond the long-standing 108-layer ceiling and could signal a new era in substrate design for artificial intelligence, defense, aerospace, and advanced communications technologies. Cross-section of the 124-layer PCB.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James
Hello, I have bought an amplifier shown below.However when I am trying to test if my VDD is shorted to GND my measuring i get the DMM beeping as if the VDD is shorted to GND. ash shown in the layout belowAlso when I measied the resistance across C2 capacitor I see only 1.6ohm.DId I get a faulty component?Thanks.A video of me doing the test is attached in the link.Thanks.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James |Aaron Carman
5 minutes is 300 seconds, and I will ignore the 20 microseconds in the denominator as a simplification. With the average current and the selected battery’s capacity, you calculate the expected lifetime. I average =((20E-03 X 20E-06) + (40E-06 X 300)) / 300Essentially 40 microamps. The average current is so low that the battery’s self discharge current could dominate.
-
1 week ago | 
allaboutcircuits.com | Luke James
At its recent North America Technology Symposium, TSMC unveiled its next-generation A14 process technology—an ambitious leap beyond the soon-to-be-deployed N2 node. Hot on the heels of this announcement, several EDA companies publicly declared support for the A14 platform, aligning their tools and flows with the foundry’s future-facing roadmap. TSMC will launch A14 production in 2028.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James
Hello all,i was building this circuit that its an amplifier made with bjt, i had some questions before simulating it. First of all what's the purpose of this feedback? and how i choose the right values for RC and RB?. Like usually when i build this circuit what im trying to obtain? what data i got? what i wanna obtain is a proper ib for my load by sizing RB, and what for the current that gonna drive the load? where is the load gonna be connected? at emitter ( in parallel ) or to collector?
-
1 week ago | 
allaboutcircuits.com | Luke James
Konrad Zuse (1910–1995) was a German civil engineer and pioneering computer scientist who built a series of machines that laid the foundation for the computers we use today. Konrad Zuse. Image used courtesy of Wolfgang Hunscher, Dortmund via Wikimedia Commons (CC BY-SA 3.0)Frustrated by the slow and error-prone manual calculations in his engineering work, Zuse began to imagine a machine that could handle these tasks automatically.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James
Dear friends,I would like to interface four electret microphones to a Texas Instruments TLV320ADC6140 ADC chip. My question is, what is the best way to go about this for optimal performance? Should I use a pre-amp circuit, or can I bias the MIC and connect directly to the ADC via AC coupling capacitors? Additional context:[1] All four microphones will be mounted to the same PCB as the ADC[2] low noise / high SNR is a key factor... Achieving low phase distortion is even more important.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James
I have a stereo line level rca feed from my Mbox 2 output. Ideally the signals would enter into a box I would easily build, then pass through a stereo potentiometer, then continuing into 2 identical outputs per stereo channel. I'll probably use 1/4' jacks and adapters because I have many. Critical audiophile integrity is not the goal...just a useful desktop control knob. I understand some small amount of signal drop can be expected.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James
Hi everyone,I'm working on a project involving a double Wien bridge oscillator with variable frequencies on a TL072CP, and I've run into some issues that I hope you can help me with:Battery Setup: What batteries should I use for the dual voltage supply? I initially went with two 9V alkaline batteries and connected them correctly, but the oscillations are not starting. The circuit is designed to operate with as low as +/- 4.5/5V, thanks to the AGC.
-
1 week ago | 
forum.allaboutcircuits.com | Luke James |Arjun Nijhawan
Hello crew,Withing the more general scope of making electronic music, I am trying to build this oscillator based on a 4049 chip:I know it's crap, but it's simple, which is good for learning I have breadboarded it successfully, I'm using a 12V supply and playing with the RC values I can adjust the frequency. Yay!Now I am trying to add voltage control to the thing. I have found another schematic with an added 1M resistor at pin 3 that says to connect CV there.
