I have a project due soon and I need to get a counter that counts down from 9-0. And it has to be the simplest one possible. I have achieved it using state machine but I believe there to be a simpler method. The best i could do for counting up is use a D-Flip-Flop ripple counter. This works well but for counting down I cant find an elegant solution. When i change the clock edge of the D-Flip-Flop ripple counter it counts down but i cant figure out how to change from 0 to 9. Any help? I am doing this in LOGISIM

In carry look ahead adder, for G and P, why is it done bit by bit and not together like G = A . B fully?? For example if A = 1010 and B = 1101, we get G0=0,G1=0,G2=0,G3=1 and even if we do it like G=1000 right, so in the end each individual bits value is going to be the same??
(Note: I implemented it in a software(xilinx vivado using verilog), it doesn't work if I AND it as a whole, it only works when I do it bit by bit.)

our house is near to the transformer like 10metres only, we get high voltage , it show in multimeter like above 270+ in mid day , in night its show 275+ , my gaming pc motherboard failed due to the high voltage( said by pc expert) , we have the inverter(ups) also ,my pc expert say like put over all main line stabilizer for your home (Our home electricity in 3 phase) except you put each stabilizer for pc and laptop you put over all main line stabilizer ,is it possible for home , if yes means how much its cost, which brand we choose please help it

https://reddit.com/link/1gn8m2f/video/fhsnlbs98vzd1/player

This is a circuit I built using some stuff I had around It is a synchronous 3-bit counter using JK Flip-flops (M74HC73) , a 555 timer for the clock pulse , some LEDs combined to create a simple 7-segment display , a custom circuit is used to translate the 3 bit binary and light up specific LED groups to display the numbers in base 10. I used an old phone charger for power supply and 74LS series AND ,OR and INVERTER ICs to build the "driver circuit".
I am a beginner in hobby electronics and just wanted to put this out there. Any suggestions are welcome.

I'm building an automatic plant waterer and it currently implements sensors for moisture, light and temperature. The project requires that I include 2-3 more parameters. Any suggestions on what could be included? I suppose pH could be one of them as well?

Hi, I m struggling to write some assertion using the delayed operator in system verilog using verilator.
It seems first verilator doesnt support |=> operator. I tried to use ##n operator but same issue, Here's an extract of my code :

sva_name: assert property (@(posedge clk) disable iff(!reset_n) ((a| b| c)) |-> ##1 ( ~d))
                 else $error("...");

Hi guys I had an idea of creating an FPGA based AI accelerator to used with embedded devices and the main goal is to replace hardcore processing system to do embedded AI tasks. Basically like Google coral TPU but for low end MCUs (i.e. can turn any low end MCUs like arduino, esp32 to AI capable)

It will have a matrix multiplication unit, specialized hardware to perform convolution, activation function, DSP to do some audio processing, some image processing system , communication peripherals, a custom instruction set to control the internal working of accelerator and it will also have a risc v core to perform small tasks.

I have plans to use Gowin Tang Nano FPGAs

The advantages of these are any low end harware or mcu can do AI tasks, for example a esp32 cam connected with this hardware can perform small object recognition locally for intrution detection, wake word detection & audio recognition. The main advantage of this is it consume low power, have low latency and we don't need any hardcore processing system like raspberry pi and other processor.

I know some FPGA & verilog and have good basics in digital electronics, AI and neural networks. ( Note: it is a hobby project.)

What do you guys think of this, will it work? How this architecture is compared to gpu architecture? Will it be better than using raspberry pi for embedded AI? How it can be improved and what are the flaws in this idea?

https://preview.redd.it/5qd1zrd37sud1.jpg?width=406&format=pjpg&auto=webp&s=23ac0060b9eeb3e66204c47bcd951cdac68160d6

(M, A, B, CI, are inputs. CO, S, N are outputs)

Which ones you would suggest? By advanced I mean stuff CPU/GPU design and if it exists FFPA design books, but I mean literally FFPA design and not just how to use them.

Hi!

It’s a small 8-bit CPU with a 16-bit address bus, and you can find it on GitHub (here's a quick overview).
I’d love to get your feedback, whether it’s advice on how to improve it or even some critiques!

Thanks a lot!

https://preview.redd.it/1zdvx5kz8mtd1.jpg?width=1543&format=pjpg&auto=webp&s=ff2f412c09eebe77db7e178cdc83040fc425cc58

I am doing a mini project on digital electronics . I did simulation on tinkercad but not getting the required output. I used a comparator(lm339) to compare the threshold levels of voltage from potentiometer (used instead of a microphone ) the the output is given to a priority encoder circuit then to a BCD decoder to a 7 segment display. Now it's only displaying zero

Basically the seven segment has to show 0-low noise. 1-mid noise 2-high noise

What's going wrong here ??

I am doing a mini project on digital electronics . I did simulation on tinkercad but not getting the required output. I used a comparator(lm339) to compare the threshold levels of voltage from potentiometer (used instead of a microphone ) the the output is given to a priority encoder circuit then to a BCD decoder to a 7 segment display. Now it is only displaying 0 everytime.

Basically the seven segment has to show 0-low noise. 1-mid noise 2-high noise

What's going wrong here ??

So for context my school has a digital electronics class through PLTW and we are just now getting into truth tables and what not. I was bored this morning and I decided to draw a simple circuit for practice and I ran it through multisim and it works. I just don’t have any practical use for it.

I’ve never used Multimedia Logic before and I’m supposed to build this circuit in it but I don’t know what those are called to even start working on it.

Logisim help

Hey guys, I am new to this whole Logisim thing and don’t really understand it all. I am currently making a (simple Fibonacci game using a digital logic circuit). The only numbers that matter are 2,3,5 and I need to implement a circuit in which each player inputs their numbers, and an output indicates which player wins. The outputs marked as p1 and p2 will be led and the draws will use a 7 segment display to display a d.

This is an assignment of mine and I’m kinda stuffed so any help would be great. The picture above is the circuit I am using for the decoder

I'm currently studying industrial automation at a technology center located in Brazil. The trouble is; I'll have a digital electronics test in about a week and I have been neglecting the subject for too long. Would there be a kind soul to assist me on this task ?

The test consist mainly of boolean algebra. Where can I find succinct texts about the matter and most importantly, what are the key point that I must have in mind.

I'm open to any suggestions.

I’m selling these for under 300CAD or make an eBay offer. Link is below.

METCAL MX500P-11

And

MX-500-RNKIT

About the unit: • Integrated Power Indication Meter • User-Programmable PowerSave Mode • Ground Fault Interrupt • Universal Power Supply

Compatible with All Metcal MX Series Products The Metcal MX-500 Soldering and Rework System utilizes SmartHeat Technology, wherein each cartridge is equipped with a self-regulating heater which 'senses' its own temperature and closely maintains its pre-set idle temperature for the life of the heater-tip. The tip temperature is determined by the inherent metallurgical properties of the heater; no external adjustment or equipment is required. The Mx-500 retains switchable dual port, 40W operation while introducing numerous features.

About the stand: There's no need to buy new soldering stations when you can renew the ones you already have with a new handpiece and sleeper stand. The sleeper stand puts your handpiece to sleep when in the v cradle, extending tip life and reducing replacement cost.

Also have a fluke meter and fuses

https://www.ebay.ca/itm/375636138198?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=yvunyhbwq7s&sssrc=2051273&ssuid=yvunyhbwq7s&var=&widget_ver=artemis&media=COPY

Suppose I have F(w,x,y,z) = Σ(2,3,5,6,11,14,15). Is it possible to implement this using 3x1 multiplexer?

Hello all. I need some advice/help from someone with hands on experience. Trying to mold a silicone keypad here (spa 3d printed mold), after the silicone cures, I make some more and use it to bond the conductive rubber pills with the keypad. The problem is that that every time I used platinum based silicone, all pills lost their conductivity after the silicone cured for some reason. Then I switched to tin based silicone and in this case the pills remained conductive but not to much. Their resistance somehow got higher. Before curing, measured resistance was 50ohms and after tin based silicone cured, measured resistance grew to 800ohms