Technology, Repair and Information Blog (voulios)

Saturday, February 13, 2021

How to setup SmartLife MS 101 WiFi || 220V Light Switch to switch ON/OFF your lamp via WiFi

Make a desk lamp smart. In this video I will show you step by step, how to setup a SmartLife MS 101 Wifi Switch. How to connect it to a desk lamp. Which app to download, how to register the wifi switch to the SmartLife app and how to switch ON and OFF your lamp wirelessly

Friday, February 8, 2019

Black and decker pivot 18v lithium repair(power on failure), battery replacement

This handheld vacuum(Black and decker pivot lithium 18v) had power on failure.

It could charge but it couldn't start working.

After a replacement of the thermal fuse. It works properly. See the step by step video instructions.

Video link below this line: : https://youtu.be/BR19-Jv4ZVQ

Photoes:

Wednesday, March 7, 2018

Arduino relay, control 220v devices code and hardware(circuit diagram)

At the first part of the video (Part-A), I will explain each line of the small code.
At the second part of the video (Part-B) I will build the hardware.

I build a solution to power on a water pump(or other 220v devices) when there is water overflow.
You can do it to power on other AC (220V) appliances such as Lights, TVs, etc.

Part-A (Code explanation).

Video link for Part-A below this line:
https://youtu.be/mQLTWnA4ZHI

Download code here: Download link
or copy the code unter this line:

#define relay1 4 //Defines pin 4
#define relay2 7 //Defines pin 7
#define sensor 2 //Define sensor pin 2 (input pin)
#define alwaysHigh 10 //gives 5v to the sensor
//#define ledPin 8

int sensorState=0; //keeps the reading of sensor pin 2 (high or low)
int flag=0; // Takes values 0 or 1. When the sensorState changes.

void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);

//pinMode(ledPin, OUTPUT); // Set the LED pin as output
pinMode(sensor, INPUT); // Set the Sensor pin as input

pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
pinMode (alwaysHigh, OUTPUT); //5V sourch, gives power to sensor

digitalWrite(relay1, !(LOW)); //OFF
digitalWrite(relay2, !(LOW)); //OFF
digitalWrite(alwaysHigh, HIGH); //ON

Serial.println("Relay-1 is OFF");
Serial.println ("Relay-2 is OFF");
Serial.print("\n");
}

void loop() {
sensorState= digitalRead(sensor);
//Serial.println(sensorState);
if (sensorState == HIGH) { // check if the sensor is in water(short circuit)
digitalWrite(relay1, !(HIGH)); // turns Relay1 ON
digitalWrite(relay2, !(HIGH)); // turns Relay2 ON
if (flag==0){
flag=1;
Serial.println("relays are now ON");
}
}
else{
digitalWrite(relay1, !(LOW)); // turns Relay1 OFF
digitalWrite(relay2, !(LOW)); // turns Relay2 OFF
if (flag==1){
flag=0;
Serial.println("relays are now OFF");
}
}
} //loop end bracket

Part-B (Hardware)

Video link for Part-B below this line:
https://youtu.be/mimGR6aEHNA

Monday, January 22, 2018

Sony NP FM 30 battery made of 18650 cells

If you have an old np-fm-30 battery, that doesn't work. Make it work again with 18650 cells.
In my case, i used four 18650 cells and the old good one charging board.
There are two sets of two batteries connected in series (2s2p)

Each 18650 cell has 1800mAh (set of two cells in parallel will give as 3600mAh)
The battery cells are connected in series and will give as 7.4V output power.

Following you can see my video and photo with schema