Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
I bought recently a brand new LG 29UM58 IPS 29 inches ultrawide from amazon. When I recieved it, I notice that came with a 110v power adapter so I bought a 7 bucks converter 220v to 110... the monitor started, and shows gray screen saying "No input connected" when I connected the HDMI cable, the...
hello everyone
I want to build a 50 Hz oscillator circuit using the LM324N IC,
any body have a schematics to how and what components I'm gonna need ?
thanks
Hi there,
I'm trying to create an electric heater for an insect repellent mat.
The only constraint is that I must use a 18650 battery.
The mats are about 35x50 mm and they need to be heated at about 130F.
In the chat, Mike_2545 suggested a power resistor like this one
and also pointed...
Generators have to deal with counter torque. The more electrical load placed on the generator, the greater the counter torque. Since the counter torque is a function of load current, if one designed a generator to be low current/high voltage, and in conjunction used a transformer to then convert...
~40 - 45 F for many hundreds of feet down and the well drillers here are greedy as all get out.
The wind tears all but the most over built wind generators to bits here.
I've played with the AE stuff all my life and when it comes to the energy levels needed for winter heating the numbers for...
Basically to power various lights and e4c im setting up something similar to a 12v outlet around my workbench, I also want to power a 24v fridge. Problem is that the 6-8A Spike when it first turns on is too much even though the psu is 15A and I've gotten it to 13A ok. I'll have a battery hooked...
Hello
Soon I am finally thinking of buying solar system.
Not that big only 600w max.
So I was thinking of buying 4x 150w panels.
I am confused how to connect them.
Series or parallel... I have researched a lot on this topic but in the end I always got confused.
The next thing is charge...
Hello
I don't know much about solar stuff.. I have been researching a lot lately on the topic. I stumbled upon this solar inverter on ebay
**broken link removed**
**broken link removed**
It has a pwm charge controller but what interests me is that with only 40A current 750W panals can be...
Hello
I need to clear some doubts about solar power.. I will write down my theory please correct them if i am wrong.
I must tell you that i have absolutely no knowledge of solar power system. I have tried google but couldn't understand how solar panals are calculated and how many batteries and...
Hello
As the title states, my ac only cheap clamp meter is reading dc currents when i am charging battery bank through an inverter...
My inverter is rated to charge 12v 150Ah battery at 16 amps and during charging when i put the clamp meter on the red battery charging cable, the meter shows...
Hi,
Ive tried to find what rating of power diode to wire in series with an emergency shut off button, I'm going to be using a DPDT as I have 2 batteries on 2 circuits - the 11 volt battery to the motors via a robo claw motor shield (2X30A) and a 7 volt battery for an Arduino and logic power on...
Hello
As the title says i need to know what should i buy? which one would give me the most accurate reading? I want to know how much power my appliances consumes, tv, washing machine etc....
Also i need to buy a new ups for my PC so just wants to know how much power my pc eats. I have a 500W...
Hi i am having a mess around at home and i am wondering, i have a circuit that is controlled by a remote, the curcuit drives a motor and is run by 3 aa batteries. How would i go about adding more to the motor by using the remote switch without blowing the circuit up by adding more batteries at...
Hello
I am basically new to all this... ESC stuff..
Thing is i have couple of old hdd's and dvd drive's motors lying around. I need to drive these motors for DIY projects.
So i researched a bit on them and found out that i need some sort of ESC to drive these BLDC motors and Servo controller...
Hi, I am currently working on a passive rectifier circuit for an implantable device. I was wondering if anyone could tell me the equivalent impedence/resistance before the diodes in the circuit i.e. nodes x, y in the attached image. Is there an expression that can be stated for all rectifiers...
I'm currently building myself a 48v phantom power supply for a microphone. I've been using **broken link removed** project posted online for both the powersupply and microphone circuits.
So far I've built this circuit below:
The problem is the voltage regulator is doing absolutely nothing to...
Hi all, I'm working on a very interesting project in the field of the free-energy: the building of a MEG (Motionless Electric Generator).
I've already made many parts of my project and now I'm in the phase of the tuning.
What I need is a schematic which can accomplish two needs:
to sense the...
Hello
I would like to ask the experts whether connections in the below diagram are correct or not? I wanna add extra power to my 10m extension cable.
**broken link removed**
I'm working on a 24VAC -> 5VDC circuit. I'm currently using a transformer to convert 120VAC into 24VAC by using a typical sprinkler transformer (it's rated for ~750mA). I've build the simple circuit to convert AC -> DC by using an electrolytic capacitor rated (100uF/50V) and a 1N4007 diode...
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