Comments on: Interfacing Relay with 8051 using Keil C – AT89C51 https://electrosome.com/interfacing-relay-8051-keil-c/ You Inspire.....We Create..... Thu, 13 Dec 2018 09:08:39 +0000 hourly 1 https://wordpress.org/?v=6.1.1 By: Muhammad Saqib https://electrosome.com/interfacing-relay-8051-keil-c/#comments/7214 Thu, 13 Dec 2018 09:08:39 +0000 https://electrosome.com/?p=5796#comment-7214 is we need any tansistor when we use 5v relay

]]> By: anonymous https://electrosome.com/interfacing-relay-8051-keil-c/#comments/7011 Mon, 05 Mar 2018 12:24:18 +0000 https://electrosome.com/?p=5796#comment-7011 hi Ebin George, i want in brief the code for IoT based home automation basead on KEIL mu vision. please share a response asap!!

]]> By: sandip patel https://electrosome.com/interfacing-relay-8051-keil-c/#comments/6609 Fri, 13 Jan 2017 18:16:00 +0000 https://electrosome.com/?p=5796#comment-6609 how to make relay circuit use of one switch and two relay.
first press switch relay1 is on,
second time press switch relay 1 is off and relay2 is on,
third time press switch relay 2 is off and relay 1 is off.

]]> By: surbhi https://electrosome.com/interfacing-relay-8051-keil-c/#comments/5130 Sat, 25 Jul 2015 12:33:00 +0000 https://electrosome.com/?p=5796#comment-5130 hey i want coding in c for elevator system in keil.
i want when lift is at 1 position it should go to 3 floor step by step an then if 1 button is pressed then step by step upwards

]]> By: Ligo George https://electrosome.com/interfacing-relay-8051-keil-c/#comments/5002 Wed, 01 Jul 2015 13:55:00 +0000 https://electrosome.com/?p=5796#comment-5002 In reply to Yogesh.

May be you are breaching the current limit.

]]> By: Yogesh https://electrosome.com/interfacing-relay-8051-keil-c/#comments/4970 Wed, 24 Jun 2015 06:06:00 +0000 https://electrosome.com/?p=5796#comment-4970 In reply to Ligo George.

i have troble with all 8 relay ON at one time
i have 8 relay interfacing with uln2803 i can only two relay on at a time but when we press third relay then all are OFF relay. so why?

]]> By: Ligo George https://electrosome.com/interfacing-relay-8051-keil-c/#comments/4868 Sat, 06 Jun 2015 10:11:00 +0000 https://electrosome.com/?p=5796#comment-4868 In reply to Er Aakash D Garg.

Try switching it by directly connecting to VCC, if it works you can solve the problem easily by reducing the value of PULL UP resistor.

]]> By: Er Aakash D Garg https://electrosome.com/interfacing-relay-8051-keil-c/#comments/4792 Fri, 22 May 2015 16:36:00 +0000 https://electrosome.com/?p=5796#comment-4792 In reply to Ligo George.

yes i did, but i think it is current in which At89s52 is lagging and didn’t able to switch TIP

]]> By: Ligo George https://electrosome.com/interfacing-relay-8051-keil-c/#comments/4782 Fri, 22 May 2015 06:37:00 +0000 https://electrosome.com/?p=5796#comment-4782 In reply to Er Aakash D Garg.

Don’t you provide external pull up resistor ?

]]> By: Er Aakash D Garg https://electrosome.com/interfacing-relay-8051-keil-c/#comments/4720 Fri, 08 May 2015 14:57:00 +0000 https://electrosome.com/?p=5796#comment-4720 In reply to Ligo George.

I was trying to interface relay via TIP 122 to At89S52, but having trouble as it is unsuccessful to drive relay

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