Capacitor problem Answered

I needed a 2.2 and a 10 uf capacitor to make a metal detector, but the values printed on my capacitors are not less than 5. I want to find that if the values on the capacitors are in uf, nf or pf. And if they are none of them. 

Question by tanyutsharma   |  last reply


Witch transistor should i choose for low noise audio ? Answered

Hello , im making a guitar pedal .The original schematic use transistor BC107B (epitaxial NPN) but i dont have it.so i find some other NPN transistor to replace it. I have 2N3903 ,2SC1815,2N3904 , but witch should i choose for low noise application ? in their datasheet i found the "NF : noise figure" , the lower NF mean lower noise ?? BC107B         NF  Typ.= 2  Max.= 10 2N3903          NF  Typ.= -  Max.= 6 2N3904          NF  Typ.= -  Max.= 5 2SC1815       NF  Typ.= 1  Max.= 10 Thanks for advance! sorry for my bad English.

Question by login721   |  last reply



How can I record my TV in good quality? Answered

I want to record my nfs mw game, but I have the ps2 version. Using my video camera would make the picture suck. How can I get a good quality video? thx!

Question by DJ Radio   |  last reply


problem with PS/2 to USB converter?

I bought an PS/2 to USB converter for my keyboard. I figured out a new problem when i was playing NFS MW i can't drive a car by using the converter. Every button has to be pressed separately, when i press a combination of steer left and accelerate button, the car moves left with a gain in speed when i release the steer left button the acceleration too stops, which is quite annoying while playing a racing game. Can anything be done to make work as it is used in normal keyboard?

Question by formsarun   |  last reply


Good values for a beginner capacitor assortment? Answered

Working at my desk, I realized I need a nice restock for my parts- I have a lot of resistors on order (pretty much the Radioshack assortment but cheaper), but I need capacitors. I dont know a whole lot of electronics, so I dont know what values are common and widely used- so I need to know what values would be good in a large capacitor assortment (Values anywhere from nf to 4700uf are available where I am ordering.. so a good large assortment) Thanks! -Astroboy907

Question by astroboy907   |  last reply


What graphic card is best for me ?? Answered

I have a Dell vostro 230 slim tower computer. It has 3 GB of RAM and Intel pentium dual core processor. I have windows 7 ultimate 64bit operating system.                            spesifications                        << video type>> integrated        :           integrated on system board                                       intel GMA X4500 discrete            :           PCI-E x16 half height graphics card                      <> integrated        :          up to 512 MB shared video memory                                       (with 1 GB system memory) discrete            :          nvidia geforce g310-512 mb                                      nvidia geforce gt220 but i want a 2GB GRAPHICS CARD Sparkle  NVIDIA Geforce gt 440 2gb ddr 3 is best for me? I am a gaming addict and so want to install a graphic card on my PC. games : gta 4, alan wake , nfs run I've never tried it before so please suggest a graphic card which will be best for me and how much it will cost. Thanks in advance......

Question by aravind r p   |  last reply


9kV 50mA tesla coil NST question. Why does the circuit breaker in my home trip when i plug in my NST?

Please someone help, this is my first tesla coil project, my setup: 230VAC 50Hz input ricci 9000v 50ma NST with a built in GFI (ground fault interrupter) but i bypassed the gfi succesfully .see pics safety gap  7,5 cm diameter pvc secondary 1000 turns #24 magnetwire (0,5mm) secondary 10 turns 8mm copper pipe primary (tapped at 7 turns) saltwater capacitor 16 green beer bottles in a bucket with a capacitance of 0,0122 uF or 12,2 nF (thegeekgroup bucket cap) static spark gap 28mm diameter stainless steel spheres as electrodes with oven fan (temporary, i am building a hyperbaric gap) 10cmx27,5cm aluminum toroid topload with a brass screw as breakout point RF ground aluminum rod 1,2 meter  When i tested the coil for the first time the spark gap was set on 6mm and i got 20cm or 8inch streamers without breakout point but the gfi on my nst tripped after a few seconds. i didn't know there was a built in gfi on my nst so i fooled around with my spark gap and safety gap and the tapping point on the primary hoping to get better performance. after a few runs the gfi started to trip very fast and i could only run the coil with the spark gap set on max 2mm, any bigger then that would trip the gfi on the nst. so i found out that it had a gfi and i bypassed it with thick wire. Then when i ran the nst i got the exact same thing but with my circuit breaker in my home. i have made a video on youtube that shows the problem here is the link: (please help) http://www.youtube.com/watch?v=piH44ohowyE please anyone help me! Any help or suggestion is very welkom!

Question by colinbarnes   |  last reply