Search found 13 matches

by Markkim
Fri Sep 10, 2021 2:20 am
Forum: General Discussion
Topic: Translated signals (multiple level) with LS7366R
Replies: 1
Views: 526

Translated signals (multiple level) with LS7366R

Hello all, I’m using 2 LS7366R ICs for interfacing with our two encoders. Now, our encoders operate at 5V and we are supplying 5V VCC to the LS7366 chips as well. However, our control unit consists of Rpi running @3.3V. So, I wanted to know is it okay if I just use the level translators and connect ...
by Markkim
Fri Sep 10, 2021 2:07 am
Forum: General Discussion
Topic: Amplifier Comparator LM311P Using Problem
Replies: 3
Views: 527

Re: Amplifier Comparator LM311P Using Problem

Thank you for you all replies. I checked the internal schematic of the LM311. The LM311 is not designed to work with only one of the collector or emitter outputs connected. If the collector is connected to a positive supply, then the emitter output can pull up. If the emitter is connected to a negat...
by Markkim
Wed Aug 25, 2021 1:33 am
Forum: General Discussion
Topic: Amplifier Comparator LM311P Using Problem
Replies: 3
Views: 527

Amplifier Comparator LM311P Using Problem

Hello, all For this little project, I'm using an analog differential comparator LM311P(parameter source: https://www.apogeeweb.net/circuitry/lm311p-differential-comparator-pinout-datasheet-equivalent.html . It is has a collector/emitter output. Because my circuit didn't function the way it should, I...
by Markkim
Wed Aug 11, 2021 1:01 am
Forum: General Discussion
Topic: Compatible NAND Memory Problem
Replies: 6
Views: 4850

Re: Compatible NAND Memory Problem

Thanks you all again.
I got the ideas, and I try to program it after apply the patch and report the log back, and I also tried the Flash Program Memory Tool to write a Boot image to the memory and have attached the console output.
by Markkim
Thu Jul 22, 2021 1:27 am
Forum: General Discussion
Topic: Compatible NAND Memory Problem
Replies: 6
Views: 4850

Re: Compatible NAND Memory Problem

Thank you for reply.
Yes, btw, can I modify the PCB and get the LOCK pin to control it. In the case of using the Flash Programming Tool, does that tool control this pin when in NANDx8 mode? Would you consider it ?
by Markkim
Wed Jul 21, 2021 2:19 am
Forum: General Discussion
Topic: Compatible NAND Memory Problem
Replies: 6
Views: 4850

Compatible NAND Memory Problem

Hi, folks 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 NAND...
by Markkim
Fri Jun 18, 2021 12:05 am
Forum: General Discussion
Topic: How does a voltage divider circuit to run an LED?
Replies: 6
Views: 3735

Re: How does a voltage divider circuit to run an LED?

Thank you for sharing ideas..
I have a bunch of 1k, 1/4W resistors, so 10 of those will work fine. I guess that 6mA at 60V is only 360mW, which might be a bit high. I could always use a lot more resistors and experiment by reducing it until I get to a suitable brightness.
by Markkim
Mon Jun 07, 2021 2:34 am
Forum: General Discussion
Topic: How does a voltage divider circuit to run an LED?
Replies: 6
Views: 3735

How does a voltage divider circuit to run an LED?

Hi, all Recently, I have a system running at 62V max, 54V nominal based on voltage divider formula (formula source https://www.apogeeweb.net/electron/what-is-the-voltage-divider-basic-and-rule.html ). I wanted to have a little alert LED, so I was thinking about using 10, 1kohm resistors, and adding ...
by Markkim
Thu May 27, 2021 8:25 pm
Forum: Computer Programming
Topic: Understand how to divide two 16 bits number in 8051 microcontroller?
Replies: 3
Views: 2637

Re: Understand how to divide two 16 bits number in 8051 microcontroller?

Thank you for helping..
Can I extend that to binary. Do a trial subtract, record 1 if it stayed positive or revert and shift if trial was negative. Do that trial subtract 16 times when shift it to the right.
by Markkim
Mon May 17, 2021 1:36 am
Forum: Computer Programming
Topic: Understand how to divide two 16 bits number in 8051 microcontroller?
Replies: 3
Views: 2637

Understand how to divide two 16 bits number in 8051 microcontroller?

Hello all, I have this project to code in 8051 series, DS80C320-ECG (data source https://www.apogeeweb.net/productdetail/maxim-integrated-ds80c320-ecg-juabqapc ) showing: "Division of two 16 bit unsigned integers being in the internal memory, quotient and remainder should be stored". I find a way to...
by Markkim
Sat May 08, 2021 2:54 am
Forum: Computer Programming
Topic: 74HC595A Shift Register Outputs Low Level?
Replies: 3
Views: 2348

Re: 74HC595A Shift Register Outputs Low Level?

Good day, all Such a busy day, what I usually face when such voltage is measured is short circuited pins, one trying to go to 1 state other 0 state, some intermediate voltage is measured. But if this is the condition for all pins then check VDD connection and VDD voltage, should be stable and there ...
by Markkim
Wed Apr 07, 2021 2:03 am
Forum: Computer Programming
Topic: 74HC595A Shift Register Outputs Low Level?
Replies: 3
Views: 2348

74HC595A Shift Register Outputs Low Level?

Hi I'm working on a project, prototype everything on a breadboard and after testing soldered everything on protoboard. I used the TI 74HC595 chip (component data source reference: https://www.apogeeweb.net/productdetail/nxp-usa-inc-74hc595pw-c1118-scb80erz) in my prototype, I wanted to have everythi...
by Markkim
Tue Jun 16, 2020 11:51 pm
Forum: General Discussion
Topic: Multisim simulation error in High-pass Filter Circuit Design
Replies: 2
Views: 1197

Multisim simulation error in High-pass Filter Circuit Design

Hi, I have problem about high pass filter circuit design. Carry out NI Multisim according to the infinite gain multi-feedback high-pass filter circuit provided by the related analog book. The cut-off frequency is 10MHz, and the component parameters are determined according to the caculating formulas...