Recent content by weitao

Is it necessary that one of the input (role as voltage reference) must be half of the total of the supply voltage?

Normally the connection of supply voltage is +-V but now is +V and ground. What happen if Op-amp (ua741) with only positive supply voltage? The op-amp still function?

If there have html or any code to open a link into other tab( not new window and with right-click of the link)?

Not me can't see the difference but have PNP and NPN transitor in first diagram and I just learn basic electronic only!

Ya ! Which transistor? And how to adjust the base? And second circuit, what is mean by "by pass"?

What transistor? NPN or PNP?

How to build this amplifier ? Need what component!

F \varpropto ma? How to say that F=ma? is not F=kma?

in control system, why have so many device like transistor? Wat is them function?

Is 0.5W laser diode hard to find? If I have, can the plan that I post previous one work?

Is I use almost 500mW d.c. and use tow convex lens has focal length of 5cm and the distance between them is less than 1cm, and add a cooling system by using liquid! Can the laser cutter form?

i want to create a laser cutter small as laser pointer! I want to cut plastic, iron and so hard material!

How to make a DIY laser cutter(small size) ? Can you help me?

How to calculate the voltage produre by solar cell ? Need temperature reading or other apparatus ?

This is the circuit