Hobby Electronics Basics

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Ferrite Transformer ?

Some hobby project uses E or Round type of ferrite transformer which are found in the HV driver circuit. As this is unc...
3 comments posted 19yrs
posted by mowhoong
3 comments posted 19yrs posted by mowhoong

My Introductory Post

Hello all.. I'm a newbie.. well sort of.. Now, don't flame me! LoL. I don't know a lot about electronics. A lot of stuf...
22 comments posted 19yrs
posted by gbowne1
22 comments posted 19yrs posted by gbowne1

Does 470 means it is a 470 pf capacitor or 47 pf?

I have a capacitor which has the mark on its body "470 k 50v." Does 470 mean it is a 470 pf or a 47 pf capacitor? Both a...
10 comments posted 19yrs
posted by dingd
10 comments posted 19yrs posted by dingd

4-20ma to 0-10 volt conversion

Does anyone know of a single ic that will take a 4-20ma signal and convert it to a 0-10 volt signal ??? It looks like s...
3 comments posted 19yrs
posted by cornytheclown
3 comments posted 19yrs posted by cornytheclown

output impedance of op-amps

Hi there, Which part of the internal circuitry of an op-amp helps achieve the requirement for an op-amp to have low outp...
17 comments posted 19yrs
posted by neutrino.cruiser
17 comments posted 19yrs posted by neutrino.cruiser

turning a 1" shaft with a stationary 12v motor

I need to slowly turn a 1" shaft clockwise and counter-clockwiset with a small 12v DC motor. The motor doesn't need a l...
20 comments posted 19yrs
posted by mike
20 comments posted 19yrs posted by mike

photographic strobe circuit?

Would anyone know where I could find a photographic strobe schematic. I have done much searching, but can only find vis...
10 comments posted 19yrs
posted by guitchess
10 comments posted 19yrs posted by guitchess

characteristic impedance and intrinsic impedance

can anybody enlighten me the difference between characteristic impedance and intrinsic impedance?
11 comments posted 19yrs
posted by haughtynarcissist
11 comments posted 19yrs posted by haughtynarcissist

JFET junkbox recommendations?

I'm ordering some parts and I wanted to pick up some JFETs for the junkbox. I got some MPF102s and several 2N3819s. I w...
15 comments posted 19yrs
posted by spam-not
15 comments posted 19yrs posted by spam-not

Light sensitive switch

I would like to turn off a supply when the light level drops below a certain point. I have 5VDC and the circut (LCD) re...
7 comments posted 19yrs
posted by nospam
7 comments posted 19yrs posted by nospam

Please help me understand humidity sensor datasheet

Hi, I want to make a humidity sensor with the Humirel HS1101LF: http://www.humirel.com/product/fichier/HS1100LF&HS1101L...
2 comments posted 19yrs
posted by mixmaster5
2 comments posted 19yrs posted by mixmaster5

Catholic Error: New Electricity

I have been told by a catholic monsignor that about 300 years ago it was realised by measurement that a simple coil can...
8 comments posted 19yrs
posted by me
8 comments posted 19yrs posted by me

what is meant by high impedence output?

I'm doing a project and need to write the output vector of an IC. One particular 74 series IC is 74LS240 which is tri s...
9 comments posted 19yrs
posted by cynhong
9 comments posted 19yrs posted by cynhong

Using RSSI to locate an object

I would like to use RSSI to locate an object in a 3D space. The space will be a square box with transmitters located on...
17 comments posted 19yrs
posted by jkacen
17 comments posted 19yrs posted by jkacen