Showing posts with label simple. Show all posts
Showing posts with label simple. Show all posts

Friday, 15 January 2016

Simple real puspose touch switch using transistor circuit

Dear friends, today we are going to learn how to make a Touch Switch ( On and Off switches separated) to use it as a wall socket switch.

There are lot of touch circkts on internet but those ate only one state switch means when you touch they will switch on and when you dont touch they switch off. Our touch switch has separated touch plate for ON and Off and it keep it state until switched off by touching switch off plate. Advantage of this is that you are sure which circuit state you really want, unlike the other touch switch that uses only one plate for on and off. You can replace the bulb with a relay to power up any device.

Part List :-

R1 - 500  kilo ohms 1/4Watt

R2 - 3.9 Mega ohms 1/4Watt

R3, R4 - 5 kilo ohms 1/4Watt

Q1, Q2, Q3 - 2N2222, 9013, or similar NPN transistor

Q4 - 2N4403 or similar (higher the better) PNP transistor

Touch plate - any touch plate for
Lamp - 3V to 6V bulb or relay
DC - 6V battery

Enjoy making such interesting touch switch circkit. If any query arises please ask them in comment section.

6V Solar battery charger circuit using LM317

Today we are going to learn how to make a simple solar battery charger for 6V battery.

The solar charger we are going to make is based on LM317 regulator IC. When battery has reached is full charge voltage (Battery voltage is higher than VDz + 0.7v), our charger circuit automatically cuts the charging to protect the battery form damage. The LED light will indicate the full charge state in the battery.

Our charger circuit will work only when the voltage level from the solar panel is much higher than the battery voltage, unlike the solar charger with regulator and controller that can charge regardless the solar voltage.

Part List:-

Solar - 12V solar cells array

C1 - 470uF electrolytic capacitor rated 25V

D1, D2 - 1N5400 or any rectifier diode rated 2A minimum

Dz - 1N5235B or any 6.8V zener diode

R1 - 3 kilo ohms 1/4Watt

R2 - 330 ohms 1/4Watt

R3 - 560 ohms 1/4Watt

R4 - 2 kilo ohms 1/4Watt

LED -3mm or 5mm Red or any low power LED

Q1 - 2N2222, CS9013, or similar NPN transistor

Bat - 6V lead acid battery

Make the above simple circuit to charge your 6V battery from clean and environment friendly energy.

If any query arises pleas ask them in the comment section, i will be happy to answer.

Wednesday, 12 November 2014

simple Li-Ion Battery Charger Circuit Using IC LP2951

How to make a simple Li-Ion Battery Charger Circuit Using IC LP2951

By :

Today's post explains a very simple yet safe Li-Ion battery charger circuit using just a single IC LP2951. Unlike lead acid batteries the one good thing about the Li-Ion batteries is that they can be charged at 1C rate (simply fast charging) initially. It means the battery's charging current can be as high as the rated AH (Ampere*Hour) of the li-ion battery at the onset. The design presented in this post can be used for charging a single 3.7V Li-ion cell or a standard cell phone battery externally at a relatively slower rate.