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I am trying to build a cellular repeater. I searched on the internet about this and found out that poweramplifiers are used in it. I saw some products for the purpose and need guidance to complete this project.
I need to understand that what is a bidirectional repeater? why is it necessary. is...
hi All!!! I am currently in a very remote area and here cellphone signal sucks!! I am thinking of building a small 5-10 watt amplifier for myself for improving the signal. the signal is good outdoors but indoors it is worst. any helps please? i am new to the communication side. i have a fair...
the code is perfect. if the loads are not conected then the relays also switch fine. kit also work fine if i connect electric bulbs as test lamps. only if the heating coils and pump motors are connected, then it starts giving problems.
I have designed a controller based circuit for my project. I have connected some accessories like heater and water pump across relays. but the problem is that whenever heater or water pump starts after relay click, the kit gets restarted. when the pumps or heaters are not connected then this...
I have a damaged stepper motor unipolar type with 6 wires. I want to convert it ino a DC motor generator for a hobby project. is it possible to convert it by winding the poles in the body? what care has to be taken of?
Thank you.
I ma trying to interrface the HIH4000-001 with 8051. but I dont have any idea of the program coding. can anyone give me a sample program? I need an approach to start with..
if the battery is of the Li-ion type dont charge it above 4.2 volts or it will go bad or even explode!! if it is of the Ni ion then it could bear the voltage, but you need to reduce the current from the charger. maximum current reduces battery life.
I am trying to drive the IRF630 from remote tester circuit. I removed the ac mains circuit and connected the pulse (LED Blink) to the Gate of IRF 630 and tried drive a motor at 12 volts from a battery. but on connecting the motor to the drain and positive the motor started working despite the...
Error in the program line follower Atmega16
I have made the following program for a line follower, But it shows the following error for AVR studio. can you help me out?
Below is the program
/*Connect the Sensors to PortA Pin 0 (Rightmost Sensor) to Pin 4 (Leftmost Sensor)*/...
actually there is a controller in the laptop that communicates with the laptop via SMbus and records it in the meemory. the memory is of EPROM type. open the battery without removing cells and see which ic is there in the circuit. it would be 48pin qfn package or 24 pin BQ series. tell me that...
i designed this circuit in a software giving my needs to it and it gave me the following output. but i have no idea whether it is a linear or switching power supply. kindly tell me what type of a circuit is this one..:?:
I have just rebuild my laptop battery and the cells that i replaced with new ones still hold a good charge. laptop used to give me 20 min backup when i took out the cells. I want to utilise the cells in a backup charger circuit for my cell phone and I-pod. i measured the voltage in the cell...
That was a bad link. the Datasheet is not for the IC i gave here. both the ICs are for different purposes. if you have any good link please give me. but verify it before posting for me. i have registered for their site but they havent replied me in 2 days. so if anyone of you could request them...
MAX1781 Problem
I have rebuild my laptop battery, formerly it had a backup of only 20 min. but then with new cells it should have increased. but it didnt happen. There is a sort of a memory in it which makes it behave like that. the chip used in it is MAX1781 how could i erase or reset the...
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