Good day everyone and happy new year! Can anyone help me building a power source using a 12v lead acid battery? All I need is a diagram for a pure sine wave power inverter that can be powered by a 12vdc lead acid battery with an output of 230vAC-240vAC. I want to make a power box for them with 3 outlet so at least they can charge their phones, listen to radio, and a light in their dinner time. I want to help them because not all the time our house is open, my mom and dad is always at work and I go to school also. I don't have that enough money to buy them inverters. My course is not align with electronics, but my heart and mind does. I really love electronics. But my parents didn't want me to enroll to a electronics course. With a little knowledge of electronics, maybe I can help them and as well as you can.

 

Good day everyone and happy new year! Can anyone help me building a power source using a 12v lead acid battery? All I need is a diagram for a pure sine wave power inverter that can be powered by a 12vdc lead acid battery with an output of 230vAC-240vAC. I want to make a power box for them with 3 outlet so at least they can charge their phones, listen to radio, and a light in their dinner time. I want to help them because not all the time our house is open, my mom and dad is always at work and I go to school also. I don't have that enough money to buy them inverters. My course is not align with electronics, but my heart and mind does. I really love electronics. But my parents didn't want me to enroll to a electronics course. With a little knowledge of electronics, maybe I can help them and as well as you can.

It’s unlikely they need a sine wave inverter for the uses you listed. An inexpensive “modified sine” model would be fine. These are so cheap that you cannot make your own for less.

How will the battery be recharged? Be careful not to drain the battery too far. This will damage it and cost more than the inverter.

 

I think it would be cheaper, easier, and more efficient, to get them a 12v phone charger, 12v light, and 12v radio.

 

I think it would be cheaper, easier, and more efficient, to get them a 12v phone charger, 12v light, and 12v radio.

That is my thinking also. It would be easier and much more efficient to give them a 12 VDC electric lantern for light, a 12 volt cell phone charger and a 12 volt radio, for example an old car radio or similar. Building a TSW (True Sine Wave) inverter is a complex project and while as mentioned a MSW (Modified Sine Wave) inverter would likely work fine, they are much less inexpensive to buy than build. Using an inverter will still require batteries to be charged periodically.

Ron

 

The brand new 150W 12 to 220 V nicely made box at Biltema cost some 15 Eur. To be concurent with China in this, if component price in shelves is about 14,99$ You must design, solder and adjust the circuit in one second. Otherhow look into ebay, probably they have even smaller and cheaper designs.
For example 10$ from www.ebay.com/itm/1500W-150W-Car-DC-12V-to-AC-220V-Power-Inverter-Charger-Converter-LOT-WP/112473836436?hash=item1a2ff68b94:m:mOzS9Zmb22hT9YqczKqwzGw or about 3W for 1$ at www.ebay.com/itm/1PCx12V-DC-to-AC-220V-Car-Auto-Power-Inverter-Converter-Adapter-Adaptor-USB-Plug/253324310648?epid=2175425958&hash=item3afb4e3878:g:-EUAAOSwsB9V~QJa

 

Its not very sensible to use an inverter to power these things, as the wasted power is significant, and about as inefficient as you can get. What lighting for dinner? a 60W incandescent? That will draw about 8 Amps with the typical inverter, and suck down a typical 40 to 50 Ahr battery in 5 or 6 hours. With these needs, go 12v or 24v and use LED lights, 12v chargers (a few dollars), and a get an old 12v car radio at the thrift store, also a few $$. LED lights: these can be purchased in dozens of forms online inexpensively, and easy to drive. put three 3W 3.6v LEDs in series, add a resistor (about 3 Ohms, 2Watts at "12v") and you will get about 800 Lumens for 9 Watts, about the equivalent of a 60W incandescent, and get 60-70 hours run time. I suggest putting your $$ and time into low voltage accessories and such; simple charging circuits with sources such as solar, which these days is quite inexpensive as well. You can start small and add capacity with time. You will learn electronics as well as have a safe learning experience. Build a PWM buck controller for the LED lights, your own USB chargers, and other things low voltage. One issue, if using a lead acid battery for storage, a good charge and top off system is critical to keeping the battery living long. This is not a complicated system, you just should not let the battery sit at low charge for too long or it will lose capacity and become useless. Recharge when used within a day or two, and use a float voltage to help recover top capacity when idle. Have fun!

 

Good day everyone and happy new year! Can anyone help me building a power source using a 12v lead acid battery? All I need is a diagram for a pure sine wave power inverter that can be powered by a 12vdc lead acid battery with an output of 230vAC-240vAC. I want to make a power box for them with 3 outlet so at least they can charge their phones, listen to radio, and a light in their dinner time. I want to help them because not all the time our house is open, my mom and dad is always at work and I go to school also. I don't have that enough money to buy them inverters. My course is not align with electronics, but my heart and mind does. I really love electronics. But my parents didn't want me to enroll to a electronics course. With a little knowledge of electronics, maybe I can help them and as well as you can.

Petkan:
A common UPS (Un-interruptable Power Supply) would do this on a platter. (and also keep your battery charged)

 

To clarify (re: Petkan), I think your response missed his needs a bit. I believe Geo Valito is saying the neighbor that he wants to help has no AC Mains power available, so a UPS is not the practical solution (requiring it to be plugged into ac mains). I applaud his trying to help, being young and willing to help. By his efforts, he will probably learn some electronics as well! Good for you! This is why I have suggested ALL low voltage electronics, simple circuits, and to stay away from mains voltage stuff. Everything he wants to do can be done at low voltage, with relative safety. I do not suggest he build or buy an inverter, as the 320v peak voltages are not to play with. The use of an auto battery or motorcycle battery can be done safely if a fuse is used, and the circuits are all low voltage. Please recommend only simple, inexpensive, and safe circuits for Geo. This is also why I suggested LEDs with ballast resistors, 12v chargers, and 12v radios. Let's keep suggestions within his needs and abilities. Thanks.

 

While I have no clue where the original poster is located I would run with the 12 volt battery idea. Run everything off 12 volts or 24 Volts DC. Now eventually the battery will diminish and need charged. Someone can either charge the battery for the neighbor or you find several solar panels to maintain the battery. That is likely the most simple and viable approach. Much of this will come down to location and what is available,

Ron