Electrical device that converts direct current (DC) to alternating current (AC).
1
vote
2answers
84 views
555 Schmitt Trigger works well with CMOS LMC but not NE555?
I have an NE555 (the non-CMOS version) running in astable mode at 118Khz. I have the output pin3 connected to input for a second 555 running as a Schmitt Trigger to invert the signal. What I found is ...
0
votes
2answers
132 views
Connecting pins of L293D to pins of inverter 7404
I would like to know the right configuration of pins using a 7404 inverter while the pins are connected to an L293d. When connected for driving DC motors why must an inverter be used? The pins through ...
-4
votes
0answers
42 views
Is it inverter problem? [closed]
I was working with my vaio, suddenly the screen became pale blac, it is on but only black, when I connect it to external monitor it works perfect, from that time, sometimes after turning on for 10 or ...
1
vote
0answers
39 views
Inputs on Samsung CCFL Inverter
I am trying to use the backlight from a Samsung laptop for a light box but have NO idea what the input connections are. I've found some Datasheets for other models but not the right one. LTN141XB-L01
...
0
votes
2answers
83 views
How can an inverter transfer energy to the power network?
It is possible to use an inverter to transfer energy from home made produced energy to the main power network. It is not clear to me how this can be achieved. What type of load appear to be the power ...
2
votes
0answers
123 views
How to make your own EL Wire (electroluminescent wire) inverter
I would like to make an EL wire (electroluminescent wire) inverter because I can't seem to find a commercial inverter that can drive the right length of wire from the batteries I would like to use: ...
0
votes
1answer
110 views
Transformerless inverter from 20*12V batteries
Is it possible to convert 240VDC from 20*12V batteries to 180VAC-240VAC pure Sine Wave?
i have an idea using H-Bridge mosfet drivers....But i have seen on web that 350Vdc is must to convert it to ...
0
votes
0answers
87 views
Design of an inverter required to run 5 laptops and 1 LCD (32") for 8 hours
I need to design an inverter which will run 5 laptops and one 32" LCD screen for 8 hours.
As per my calculation,
average laptop = 135watts
average LCD = 82watts
wattage for 5 laptops = 135*5 = ...
1
vote
1answer
104 views
HBridge short circuit between switches
I read that the h-bridge driving a transformer primary of an inverter whould benefit from a phase in which the primary is short circuited, before being switched to the opposite current.
How much this ...
0
votes
1answer
210 views
Diagnosing LCD backlight inverter problem
I am having problems diagnosing the error with a notebook LCD display inverter.
Symptoms: After switching the notebook on, the LCD backlight comes on but the intensity oscillates rapidly (flickers). ...
6
votes
1answer
229 views
What is the nature and history of UL capacitor recognition?
First, the background. I've been working on a grid-tied inverter design for some time now. General topology is:
We've just completed UL listing our product under 508c, and the process was quite ...
1
vote
2answers
335 views
Square wave inverter
I would like to have an idea for a square wave inverter I am making.It would be a 48V to 415V in the final product,but initially I am trying it with a 24V to 207V with the same transformer.
I am ...
1
vote
1answer
95 views
Does performance of PV inverters degrade over time?
Does anyone know if the performance of solar inverters degrades over time? If so what is the mechanism?
5
votes
2answers
402 views
How does an inverter affect the computer?
I have rampant power failure in my country. So to mitigate, we have an inverter that basically converts the charge from a big lead-acid battery to AC. But as far as i know this doesn't produce pure ...
5
votes
2answers
506 views
How do I power a LCD Backlight inverter (got from a disasembled LCD screen)
I have two LCD Backlight Inverters lying around here and I want them to powerup without using any laptop part / motherboards.
I want to power it by using a simple power source, I have both AC and DC ...
2
votes
2answers
523 views
CMOS inverter with gate of PMOS transistor always grounded
If there is a CMOS inverter such that the gate of the PMOS transistor is always attached to the ground and the input voltage is only applied to the gate of NMOS, then how would the inverter behave, as ...
0
votes
1answer
293 views
RS485 how to tell if HXPS-2108F Prolific is working
newbie at electronics (not PC's or software) - my first project is to connect the PC up to a Solar Power Inverter to datalog. Aurora inverter.. great wiki here ...
1
vote
1answer
181 views
Design a simple circuit to generate -21V..-24V from +5V
I have got an old-STN-LCD which needs a very negative voltage, -21V..-24V are required in order to do the proper contrast, a current of less than 200nA is required, the LCD controller also requires a ...
1
vote
2answers
535 views
Inverter ICs for (5v DC -> 5v AC) and (9v DC -> 9v AC)
What are some ICs that can turn 5v DC into 5v AC? How about 9v DC into 9v AC?
I'm wiring up the liquid-crystal lenses from active shutter 3D glasses to be electric-powered sunglasses. Depending on ...
3
votes
2answers
2k views
Design Tips on making a battery powered inverter with 5A output
I'd like to make an inverter that can take an input DC voltage of 13~16V and give an output of 120VAC at 60Hz that is capable of providing up to 5A (perhaps more). For the battery, I would be using ...
5
votes
3answers
506 views
Cascaded logic inverters
In this datasheet the logic diagram shows three cascaded inverters to get a simple inverting function.
So that would mean that you have three PMOS-NMOS pairs in succession. Why is this better ...
1
vote
3answers
243 views
Is it possible to build a inverter that operates at a frequency set by an LC tank using ONLY that LC tank and transistors?
I was always dissatisfied with inverters because it seems like an LC tank and transistors would be all you need. However, after much time spent simulating and a few false positives experimenting, I am ...
0
votes
1answer
174 views
Circuit for helping big motor to launch
Is there any electric circuit that can help a 2000W Inverter to run a motor with 500W but actually want a big power resource at launch time such as refrigerator?
I think if we have a big Capacitor it ...
3
votes
1answer
305 views
Is there an IC that inverts DC==>AC at the resonant frequency of a tank connected to it? (~50V ~40A)
Assuming I used the word "tank" correctly (something that has a resonant frequency) I have been working on a circuit that has 4 leads--two for DC input and two for AC output--such that you can attach ...
1
vote
2answers
434 views
PCB-mount DC to AC inverter [closed]
Folks,
As you know, there are small PCB-mounted AC to DC power supplies. Some of them are encapsulated “bricks”, and some are open frame. I’m looking for a small (12W or so) DC to AC inverter in a ...
1
vote
1answer
835 views
LCD backlight CCFL lamps power supply
I have a quantity of LCD panels (from a wide range of dead laptop) and I would like to use only the CCFL + diffusors as a "creative" light source for a room in my house.
Is there some sort of ...
2
votes
3answers
421 views
Controlling Voltage or Amperage with a PIC
Although I have a fundamental understanding of electronics, I still have much to learn and this one has me stumped. I am trying to control the speed of a TB Woods SM1 AC Inverter drive that in turn ...
1
vote
1answer
135 views
how grid tie invertor works?
I read it somewhere that it should be a current source as grid is low impedance voltage source. ( whatever that means. ) I get the part where voltage is converted from DC to AC via Inverter. But what ...
0
votes
1answer
579 views
how to run 12V x 2 battery inverter in (12V x 2)+(12V x 2)?
apologies if i can't ask this in this stack.
My 24V sine inverter runs on 12V x 2 lead acid old batteries (left with ~50% capacity).
I want to buy two new leadacid batteries but still try to ...
4
votes
2answers
604 views
Building an inverter to charge various devices
With all the power outages being caused by Hurricane Irene, I thought it might be useful to have an inverter that I could charge my cell phone with. Plug in battery power on one end, cell phone on ...
1
vote
2answers
323 views
My inverter keeps flipping between battery/mains slowly at first, then faster. Why?
Here's the situation.
I'm possessed of an inverter purchased nearly a decade ago.
A few months ago it started to make a clicking noise of it's own volition
The repairman said he replaced the relay ...
1
vote
3answers
1k views
Is this a good “pure” sine wave inverter design?
I'm in the initial stages of designing a pure sine wave inverter. My design is as follows:
Wien Bridge Oscillator (5V at 50 Hz) -> Class D Amplifier -> Output transformer
My question is, is this a ...
11
votes
2answers
2k views
Electronic Drivers for Fluorescent Lamps: How is the DC-to-AC Conversion done?
Pretty much all (somewhat inaccurately named) electronic ballasts for fluorescent lamps run off a DC voltage and have to convert it into AC to operate the lamp.
The DC supply can come from rectified ...
5
votes
4answers
707 views
How do transistors replace the electromechanical switch in an inverter circuit?
Quoting from wikipedia:
"In one simple inverter circuit, DC power is connected to a transformer through the centre tap of the primary winding. A switch is rapidly switched back and forth to allow ...
5
votes
4answers
384 views
Can you offer suggestions for this voltage interverting circuit?
I have come up with this circuit, mainly through experimenting and trying things out. It basically inverts Vcc into -Vcc (chiefly for using as a V- for things like op-amps and other such low-power ...
7
votes
2answers
491 views
Convert 5VDC to 400VDC
i'm currently making a geiger-counter and therefor I need to crank my 5VDC up to around 400 VDC, the current is very low, around 0.015-0.02 mA. What would be the best way to generate 400VDC from my 5v ...
4
votes
4answers
3k views
which kinds of electrical equipment need a pure sine wave inverter to work correctly?
I am planning to purchase a good inverter, and pure sine wave inverters cost about 3 times as much as modified sine wave ones of the same power. I am thinking about a 2000W continuous/4000W peak ...
4
votes
1answer
295 views
Voltage used to charge a UPS-Inverter and its usage
I'm new to this area and know very little about electrons and how electrical components work. I'm always curious about Inverter/UPS usage.
I'm from India and we have a inverter at home. It is ...
0
votes
1answer
456 views
Digital Inverter or Analogue Inverter?
Can any one recommend / compare performance of digital inverter and analogue inverter for home UPS application? Which one is better, Analaogue or digital ? and why?
3
votes
4answers
622 views
Recomendation for a digital inverter made of discrete components
I have a digital circuit in which I need only one logic inverter, and both PCB size and power consumption are serious constrains. So I thought about using a pair of complementary SMD MOSFETs (the ...
4
votes
1answer
901 views
What's the difference between an inverter with a bubble at the input and one with a bubble at the output?
See this datasheet, page 2.
The diagram shows logic inverters with bubbles at the input or at the output. Is there an actual difference between them?
0
votes
1answer
331 views
safe to use surge protector with 12vDC mobile power inverter?
Is it safe to use a surge protector which is plugged into a 12VDC mobile power inverter? Or will it damage the surge protector (or the inverter)?
5
votes
3answers
3k views
Powering laptop from 12V sources without inverter
This question has two parts:
1) How inefficient is it to boost 12V to 120V and then back to 12V as in using a traditional car power inverter to power a laptop (i.e. the 12V car battery power is ...
1
vote
3answers
550 views
How do I convert 12Vdc solar to AC?
We are using 12V DC solar power at home, and I want to use it for home appliances. Can you suggest what should I have to use for this? At present we are using 4 (12V) lights and one DC fan. Now we ...
2
votes
2answers
311 views
Correct EL Driver Rating for 8 Channel Sequencer
I'm trying to use an 8 channel EL sequencer (found here) to control eight 10-foot segments of EL wire. I'm having trouble figuring out what the appropriate length rating is that I need on an ...
2
votes
4answers
2k views
Hex inverter floating outputs
For a project, I am connecting the output ports of a 74AC04E hex inverter to bnc ports.
Something could be (but not necessarily) be plugged in at one or more ports at a given time.
Should the ports ...
2
votes
4answers
197 views
High output current hex inverter in SMD capsule
I am trying to find a hex inverter which has as high output current as 74AC04E (50mA) but surface mounted.
I haven't had any luck so far...
1
vote
2answers
438 views
Was this a high IGBT gate current?
I'm controlling an IGBT inverter with a DSP. I'm pretty sure I turned on two IGBT's at the same time which made a short circuit. The PCB I'm using to step up the PWM signal to drive the IGBT's let the ...
3
votes
3answers
409 views
Plugging a UPS into an inverter
First off, I am aware that plugging an UPS into an inverter is a bit redundant. The only situation I can think of it being useful is in a car when you want full amps for cranking over the motor but ...
