Other Arduino Codes and Videos by Robojax
Arduino code to read temperature using CD74HC4067 chip and Arduino with 6 wires to control 16 Channel relay module.
This code controls ONE channel at a time because of using multiplexing methode.
/*
* using CD74HC4067 chip to control 16 channel relay
* with any Arduino board. This code will control 1 relay at a time
*
* watch video instruction for this video:https://youtu.be/lQL6dfL_rsg
*
* Watch main video explaining the 16 channel relay module:
* https://youtu.be/Q9aBI4ELKC4
*
* Written by Ahmad Shamshiri for Robojax.com on Sunday September 30th, 2018
* at 13:56 in Ajax, Ontario, Canada
* Video Tutorial recorded Nov 30, 2018
*
* This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.*
* This code has been download from Robojax.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
const int SIG = 2;// SIG pin
const int EN = 7;// Enable pin
const int controlPin[4] = {3, 4, 5, 6}; // 4 pins used for binary output
int loopDelay = 1000;// delay in loop
const int muxTable[16][4] = {
// s0, s1, s2, s3 channel
{0, 0, 0, 0}, // 0
{1, 0, 0, 0}, // 1
{0, 1, 0, 0}, // 2
{1, 1, 0, 0}, // 3
{0, 0, 1, 0}, // 4
{1, 0, 1, 0}, // 5
{0, 1, 1, 0}, // 6
{1, 1, 1, 0}, // 7
{0, 0, 0, 1}, // 8
{1, 0, 0, 1}, // 9
{0, 1, 0, 1}, // 10
{1, 1, 0, 1}, // 11
{0, 0, 1, 1}, // 12
{1, 0, 1, 1}, // 13
{0, 1, 1, 1}, // 14
{1, 1, 1, 1} // 15
};
void setup() {
// Robojax 16ch relay with multiplexer 20181201
for(int i=0; i<4; i++)
{
pinMode(controlPin[i], OUTPUT);// set pin as output
digitalWrite(controlPin[i], HIGH); // set initial state as HIGH
}
pinMode(SIG, OUTPUT);// set SIG pin as output
digitalWrite(SIG, LOW); // set SIG sends what should be the output
// for low trigger relay it should be LOW
// for HIGH trigger high it should be HIGH
pinMode(EN, OUTPUT);// set EN pin as output
digitalWrite(EN, LOW); // set EN in (enable pin) Low to activate the chip
Serial.begin(9600);
// Robojax 16ch relay with multiplexer 20181201
}
void loop() {
// Robojax 16ch relay with multiplexer 20181201
for(int i=0; i<16; i++)
{
channelControl(i);
delay(loopDelay);// wait for loopDelay ms
}
//channelControl(7);// this will turn on only relay 12
Serial.println("===============");
// Robojax 16ch relay with multiplexer 20181201
}
/*
*
* @brief controls each relay ON or OFF
* @param relayChannel (integer)
* @return no return value
*/
void channelControl(int relayChannel)
{
// Robojax 16ch relay with multiplexer 20181201
digitalWrite(controlPin[0], muxTable[relayChannel][0]);
digitalWrite(controlPin[1], muxTable[relayChannel][1]);
digitalWrite(controlPin[2], muxTable[relayChannel][2]);
digitalWrite(controlPin[3], muxTable[relayChannel][3]);
Serial.print(relayChannel);
Serial.print (": ");
Serial.print(muxTable[relayChannel][3]);
Serial.print(muxTable[relayChannel][2]);
Serial.print(muxTable[relayChannel][1]);
Serial.println(muxTable[relayChannel][0]);
// Robojax 16ch relay with multiplexer 20181201
}//channelControl end
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