How to make an Automatic Mobile Charging at Home in 2020 | Automatic Power Cut

#automaticmobilecharging #timercircuit #555timer
Here is the simple project to make an automatic mobile charging at home.
Components Required:
1. IC-555 timer
2. Relay- 9v
3. Step down transformer 9v-0-9v
4. Transistor -BC548
5. Diode- IN4007 -(4)
6. Capacitors-1000µF, 470µF & 330µF (tantalum type) (All are above 25v rating)
7. Buzzer-(1)
8. Resistors-3..3MΩ, 10MΩ, 10KΩ, & 1KΩ
9. SPDT switch
10. Push to On switch
11. LED (any color)
12. AC plug socket
13. AC plug
Circuit & Explanation: www.bluedotele...
Music credit: 1. Tobu & Itro sunburst (NCS Release)
2. Syn Cole-Feel Good (NCS Release)
3. Feel good by MBB
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TRANSCRIPT:
Hi viewers, welcome to BlueDotelectronics, here is the interesting circuit to make an automatic mobile charging and it can be used for any other appliances.
To make this circuit, there is no need for programming and no external battery is required and no complex circuit is there
So let's get started
The circuit diagram and explanation link are given in the description. For a list of components kindly refer to the description below.
Connect the second pin of the 555 timer IC to its sixth pin
Connect a 330µF capacitor positive pin to 2nd pin of the IC
Connect a 10MΩ resistor to the 6th pin of 555timer IC
Connect a 3.3MΩ resistor to the 6th pin of the IC
Connect a 10KΩ resistor to 3rd pin of the IC
Connect another end of 10KΩ resistor to base pin of the transistor BC548
Connect a 1KΩ resistor to the collector pin of the transistor
Connect an IN4007 diode positive pin to the collector pin of the transistor BC548
Connect the 4th and 8th pin of the IC to Vcc but I left all the connections of Vcc and ground so that I can connect in one shot at the end.
Two IN4007 diode negative pins to be connected to the Vcc
Connect collector pin of the transistor to one of the coil pins of the 9v relay
Make proper holes on the zero PCB to fit the relay
Connect an IN4007 diode positive pin to NO pin of the relay
Connect the positive pin of the 1000µF capacitor to the common pin of the relay
Connect positive pin of the buzzer to NC pin of the relay
A 470µF capacitor positive pin to be connected to the Vcc and negative pin to the ground
Take a center-tapped 9v transformer and connect the 9v output wire to positive pins of the IN4007 diodes.
Connect the neutral wire of the transformer to the ground.
Connect other ends of 10MΩ, 3.3MΩ resistors and Vcc to an SPDT switch as shown
Connect the Vcc and ground pins to the components as shown.
Connect AC plug wires to the transformer and another common pin of the relay
Here I have used the MDF cardboard to enclose the circuit.
Connect push to on switch to another common pin of the relay and AC wire to an AC plug socket.
Connect transformer wire, ac plug socket wire, and NO pin of the relay to Push To On switch.
Connect an LED across Vcc and collector pin of the transistor via a 1KΩ resistor
Now enclose the circuit using MDF cardboards and a glue gun.
Now give the AC supply to the circuit and press the Push to On switch
Exactly after 1hr, this circuit disconnects the main power supply from the mobile charger.
For 20 min mode:
I am using this circuit to cook rice in an electric cooker.
When you leave the rice cooker till warm mode then there will be a problem of rice sticking at the bottom. To avoid this we use a 20min timer mode for a perfect cook for 2 cups of rice without rice sticking
Now the biggest question is how the time is calculated in the circuit.
It is by using the formula T=1.1*R*C
Here, T is the time in seconds
R is the resistor value in ohms
And C is the capacitor value in Farads
For the 10MΩ resistor, the T value obtained is 3630 seconds or 60.5 minutes
And for 3.3 MΩ resistor, the T value obtained is 1197.9 seconds or 19.96 minutes
Yes, there will be an inaccuracy of less than 5min. when you use an electrolyte capacitor. This is due to the current leakage in the capacitor. To get the exact time use a tantalum type capacitor.
Troubleshooting:
Check the circuit connections with the help of a circuit diagram and a multimeter by setting it to continuity mode.
Check the polarity of capacitors
Check the pin connections of the relay as pinouts are different for different manufacturers
Check the 555 timer IC
Thanks for watching.

[@banveer100]

Innovative idea..good ..keep it up👍

[@miadikim]

Nice🥰😎

[@VKAgriInputs]

Superb

[@dharavathjayaram7350]

Nice