Presentation of DIY automatic solar charger controller making by Vikram Kant kumar reference by instractable

1. FACULTY OF ENGINEERING & TECHNOLOGY
GURUKUL KANGRI VISHWAVIDYALAYA
HARIDWAR (U.K)
Vikram kant

2. PRESENTATION TOPIC
DIY AUTOMATIC SOLAR CHARGER CONTROLLER
SUBMITTED BY
 Vikash Kumar
 Vikram kant Kumar
SUBMITTED TO
 Mr. Gajendar Singh Rawat
 Mr. Brijesh Kumar
 Mr. Ashish Dhamanda
 Mr. Bhuwan Satija

3. Table of contents
 Intro: DIY AUTOMATIC SOLAR CHARGER CONTROLLER
 Step1: My Goal
 Step2: Circuit
 Step3: Calibration
 Step4: Wiring
 Step5: Working
 Step6: Moment of truth
 Step7: Thank you

4. DIY AUTOMATIC SOLAR CHARGE CONTROLLER
INTRO:
It’s an automatic switching circuit that used to
control the charging of a battery from solar
panels or any other source.
It’s a 555 based simple circuits the charge the
battery when the battery charge goes below the
lower limits, and stop charging when the battery
reaches it’s upper limit voltage

6. Step 1 :- My Goal
“To make a cheap and efficient solar charge
controller”

7. Step 2:circuit
To make this circuit you need
1.NE555 IC with IC holder
2.One 2N2222 or PN222a Transistor
3.Three 1K Ohm resistors
4.One 330 Ohm 1/5 W resistor
5.Two 330 Ohm 1/5 W resistors(optional)
6.Two 10K variable resistor
7.Two LEDs (green & red)
8. 1N4007 Diode
This is the driving circuit of the DIY AUTOMATIC SOLAR CHARGE
CONTROLLER.

8. 9. 5V SPDT relay
10. two, 3-Pin PCB Connector
11. Wires
12.PCB
13. LM7805 (TO-220 type)
14.Two capacitors (I am using .1uF ,you can use any)
15.IRF 540 MOSFET

10. The 5Vv relay is the main component of this circuit; it's an
SPDT (Single Pole Double Throw) relay. It have one common
(pole) terminal and 2contacts in 2 different
configurations.one is NO (Normally open) and other one is N.C
(Normally closed)
In our case we connect the +ve of the solar panel to the pole
of the relay and + ve of the battery is connected to the SCC
(solar charge control)
The circuit check the battery voltage the voltage is less than
or equal to lower limit the current is flows to the battery and
battery star charging. When the battery voltage reaches the
upper limit , the rely is activated and the current is redirect
to N.C for dumping

11. Image Notes
1.Push button
2.Test point for upper limit
3.Test point for lower limit
4.IRF 540
5.2N2222
6.Use any 2 capacitors
7.TO-220 TYPE
8.You can add a 330 Ohm 1/2 watt resister.it will help protect
against accidental short circuits if the trim pots are at the
limits of travel and the push buttons are pressed, or if both
push buttons are pressed at the same time
9.You can add a 330 ohm 1/2 watt resister. It will help protect
against accidental short circuits if the trim pots are at the
limits of the travel and the push buttons are pressed, or if
push buttons are the same time

12. Image Notes
1. To manually stop charging
2. For manually start charging

13. Step 3: Calibration
After finishing the circuit you need to set the upper
and lower limits. Battery celebration is required to
avoid the overcharging and over discharging of the
battery voltage reaches the upper limit or 14.9 volt .the
relay is activated and circuit start dumping
To set the limits you will need a multimeter and a
variable power supply or two power supplies. One with
12V and other one with 15V. First you will need to set
the lower limit. For that set the voltage to the 12V and
connect it to the circuit. Connect the ground weir to
the conmen of the multimeter and touch the testing
probe to the pin 2 of the 555 IC. Adjust the voltage by
adjusting the VR to get 1.66 volte. Then set the voltage
to 14.9V and touch the pin 6 of the 555 IC. Adjust the
voltage to 3.33V.check once againg .Now over SCC is

14. Step 4:Wiring
The Fig show the wiring diagram of the SCC
First connect the +Ve from the solar panel to the centre
pole of the relay then connect a red wire from battery to
N.O of the relay. Connect the –ve wire from the solar
panel to the –ve of the circuit then connect the battery’s –
ve to the circuit.

16. Step 5:Working
When the battery voltage is less than 14.9V the it start
charging by passing current through N.O of the relay.
When the batteries voltage reached 14 volt its
automatically switch the relay to N.C if you are using solar
panel you don’t need an dummy an load to dump the
excess power. You can add an extra battery to the N.C to
harvest the excess power .