Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Search results

  1. D

    anyone have ever use "melsec a1shCPU with GX developer v.8"??

    i need to build a ladder program with this PLC (A1shCPU from mitsubishi) and use GX Developer v.8 as the software. if u can help me with the list of relay an timer simbols that i can use from this PLC, since i need a relay, timer to build this program. and if you could help me, how should i...
  2. D

    [SOLVED] please help me to read this capacitor value

    ok thx all. and this question [SOLVED]
  3. D

    [SOLVED] seven segment in microcontroller

    well if you want to use a switch, than this switch used to connect the ground or to the power of each seven segment, so, to make it simple, even you actually give the same output to all of the three seven segment, if you only activated 1 sevent segment, you make an illusion as if you able to...
  4. D

    help to use a wireless serial comm with TLP and RLP 315Mhz (from Laipac)

    I only have two question for the code i just download from you, 1. why don't you describe the port for data Output when it's receive data? 2. can I download it to my MCU? my AT89S51? by the way if don't reply again after this that means I already off. So I'm sorry, I really don't have any mean...
  5. D

    help to use a wireless serial comm with TLP and RLP 315Mhz (from Laipac)

    well if i use regular transmission use RS232 only, the program (above) it went well. I mean correct. I only found problem when I use the wireless comm use this paired IC (TLP and RLP 315Mhz)
  6. D

    help to use a wireless serial comm with TLP and RLP 315Mhz (from Laipac)

    hi embedded parter you quit good on describing the main progres of this operation, but the output is always full of noise so I can't tell which it is swhowin the data I send, with TLP or the noise. I use AT89S51 for recieve the data and Hyperterminal to send the data.
  7. D

    [SOLVED] please help me to read this capacitor value

    here is the pict of my capacitor, may it helps you to help me read it's value. thx for all reply but i still confused. :P
  8. D

    Using RLP 434 and TLP 434 modules on microcontroller without noise

    hi ctownsend, the character of "*" and "#" send first every time we want to recieve data. wich means the other data that is not the same as * and # will be rejected (the noise), but after the receiver receive the * and # charater, the next step is receive the data, that means the real data won't...
  9. D

    [SOLVED] please help me to read this capacitor value

    okay this question seems so stupid, i also embaressed to ask it, but i really need it. my capacitor value writen as "1U0J100" it is a square-look capactior. so anybody can tell me how much farad it is?
  10. D

    how to choose the value of the feedback cap in switch-capacitor circuit

    xcuse me. can any of you help me with read the capacitor code. i have a square-look cap with 1u0j100 writen on it. is it 1 nF? thx and sorry to ask it here.
  11. D

    please help as much as u can

    don't pick subject thst sound cool but you can't handle. pick one that is as simple as possible that qualified enought to bring you to your graduation. but i you insist on this subject please at least use google to specified the question that we can answer.
  12. D

    Speed control by microcontroller

    use PWM that way you can control the speed of motor. define the variable, for example if you want to make 3 variant speed for your fan then define speed 1 as 30%, speed 2 as 65% and speed 3 as 100% of duty cycle.
  13. D

    help to use a wireless serial comm with TLP and RLP 315Mhz (from Laipac)

    i use TLP and RLP 315Mhz produced by laipac to send and receive serial data. the plan is i send data from my PC use hyperterminal on Comport 1, then comport 1 connect to RS232, RxOut connect to TLP tx pin, then the data should be receive by my RLP that connected to my MCU and the data displayed...
  14. D

    Using RLP 434 and TLP 434 modules on microcontroller without noise

    for this problem maybe you can add a procedure in the receiver program to eliminate the noise. for example, you can lomot the data that you receive will only the data that comes after 2 charachter like "*" and "#". so you make a filter to reduce the data that your receiver should display. after...
  15. D

    [SOLVED] selecting an IC buffer

    to:ppdr123 yes X1-1 and X1-2 is L298 output to the motor, this device design flow is like this, MCU give signal like ENable (Enable A and Enable B was connected to be one pin) and PWM for IN1/IN4; IN2/IN3; to:FvM yes the MCU pin output goes to the opto coupler to drive L298. I afraid if I use a...
  16. D

    [SOLVED] selecting an IC buffer

    i'm sorry but i don't really get by your mean of "pulling too much current"? but some of my friends also recommend the ULN2003 maybe it will be more clear if I put my device sch right? here it is. and i use a MCS51 or technically "AT89S51" so your link might be a little miss to the problem i...
  17. D

    [SOLVED] selecting an IC buffer

    I need an IC buffer to keep the voltage from my micro high. When I program my micro to produce a high logic "1" (3.5-5v) I only get that much when i haven't connectt my micro to the device i need to control. because after i contact it to my device the voltage drop to the level 0.8-1.6V even i...
  18. D

    [SOLVED] seven segment in microcontroller

    use the ground (from your sch) to select wich seven segment you wnt to use.
  19. D

    interfacing dot matrix printer with AVR

    first find out the parameter that needs to be inisialyzed for the printer. than you can make the inisilisation for the serial comm as a procedure that can be called any time you wnt to send your command to the printer. well i recommend that the avr only used as a bridge between PC and printer...

Part and Inventory Search

Top