Sounds almost like the power output trannys are blown. Thus putting the transformer DC across the power lines. A dead short, since DC wise, the transformer...
7226
multiuseguy
Dec 4, 2003 4:38 pm
I've seen some IC sockets with built in Decoupling Capacitors. What is the function of these devices? Is there a parameter of when they should be used in a...
7227
derickcyril
Dec 4, 2003 4:38 pm
Suppose I have to design a single stage amplifier using a transistor for a gain less than the minimum gain, say using BC107(beta=100-500) for a gain 5, does...
7228
Dave Mucha
dave_mucha
Dec 4, 2003 5:45 pm
... ah.... the best approach would be to get another PC, and old one, and use a working power supply. for instance, if the 110 VAC was rectified and passed to...
7229
Scott Thompson
blueelectron9
Dec 4, 2003 5:48 pm
For a single-stage transistor amplifier, you will have to use an emitter degeneration resistor to provide your gain of 5. It will not be as stable as having a...
7230
don_kinzer
Dec 4, 2003 10:33 pm
... they ... Decoupling capacitors serve to absorb transients that appear on the power & ground line due to logic switching. The problem is more or less...
7231
manifold
manifold_1
Dec 5, 2003 12:38 am
Does that really work for switching supplies? The inrush current is pretty high which would light the bulb and cut the power. I would think it would just sit...
7232
rgsparber@...
rgsparber
Dec 5, 2003 12:50 am
In a message dated 12/4/2003 11:50:10 AM Central Standard Time, electronguy@... writes: For a single-stage transistor amplifier, you will have to use...
7233
manifold
manifold_1
Dec 5, 2003 1:02 am
Use them when you have no more PCB space for the decoupling caps! Also, the built in caps exhibit less inductance than caps that are located at a further...
7234
Dave Mucha
dave_mucha
Dec 5, 2003 2:32 am
... the caps supply the chip with power as switching devices like micro's and such switch outputs. Thes act as a method of keeping the spikes off the main bus...
7235
ericshufro
Dec 5, 2003 5:55 am
http://eric.shufro.com Ive been reading various forums and have ironed out some of the kinks in my latest project. I thought i would share it with everyone....
7236
sjhartley98
Dec 5, 2003 4:52 pm
I am looking for some information, sites, tutorials that cover motor control. Is there a good site or tutorial that will introduce the topic and give general...
7237
dangermouse
dangermouse1956
Dec 5, 2003 5:28 pm
Thanks. It's interesting, even if I don't fully understand it! ;o) -DM ... From: "ericshufro" <eric@...> To: <Electronics_101@yahoogroups.com> Sent:...
7238
Harold Walton
hwalton20022000
Dec 5, 2003 5:38 pm
What Motor do you want to drive? Stepper or Normal? What voltage? What do you want to use Mosfets or Power Transistor? Motor Switch, Slow Start or PWM? Harold...
7239
sjhartley98
Dec 5, 2003 6:15 pm
Exactly.. I am not working on a project and thoes questions are the exact ones I want explained. What are the different types of motors and what are the...
7240
skybirduk
Dec 5, 2003 6:38 pm
I am a total beginner and wish to buy "simple project" materials in the uk. Can anyone suggest supplier? Peter D....
7241
harold WALTON
hwalton20022000
Dec 5, 2003 7:27 pm
Try http://maplin.co.uk or http//www.farnellinone.co.uk Maplins charge for their catalogue but Farnell will send you one for free if you make yourself a...
7242
Dave Mucha
dave_mucha
Dec 5, 2003 7:59 pm
Hi Steve, Using 'hobby' as the key, I assume you can ignore PSC, Capacitor start, 3-phase and like type of motors. That leaves, mostly DC motors as most AC...
7243
multiuseguy
Dec 5, 2003 11:11 pm
Thanks for the explanations andI think I digested the concept so all I want to do is have some 74374 chips tied to the output of the parallel port of my...
7244
Kelly Hoffman
kellyhman
Dec 6, 2003 12:54 am
7245
don_kinzer
Dec 6, 2003 3:27 am
... all ... It never hurts to put them in. The slow rate of switching isn't the main problem. Many of the 74 series ICs have what's called a totem-pole output...
7246
multiuseguy
Dec 6, 2003 2:54 pm
I'll buy the IC sockets with the caps built in. Less parts to play with then. Thank you to all that help me on this question, much appreciated! M.U.G. P.S....
7247
jpurcell@...
allenjamesp
Dec 6, 2003 3:38 pm
multiuseguy, ... Personally I wouldn't use sockets unless the chips being installed needed to be protected from the head of the soldering iron or tended to go...
7248
dangermouse
dangermouse1956
Dec 6, 2003 3:58 pm
I don't mean to seem like I'm arguing here, but my own perspective is that I almost ALWAYS use sockets for through-hole ICs--but I use only the type with...
7249
jpurcell@...
allenjamesp
Dec 6, 2003 4:23 pm
dangermouse, ... No problem, besides I LIKE to argue. :-) ... Another reason for not useing sockets that the ones that are not problematic are often more...
7250
dangermouse
dangermouse1956
Dec 6, 2003 5:17 pm
Hey, that's partly what a group like this is for--to get a variety of perspectives. I just wanted to make sure I wasn't coming across wrong, as I have been...
7251
Dave Mucha
dave_mucha
Dec 6, 2003 7:31 pm
... I just thought you might like to get an update. I had an old damaged drive, exact same model. platters were trashed, probable dropped, got it from a...
7252
Steve Greenfield
alienrelics
Dec 6, 2003 7:51 pm
Here are some of the lists I own or moderate that some here might be interested in. I am fairly specific about staying On Topic, although some of the lists...
7253
Phil
phil1960us
Dec 6, 2003 10:58 pm
I feel my education in electronics is lacking because I haven't learned surface mount techniques. I get the general idea but wonder what the best way to learn...
7254
don_kinzer
Dec 7, 2003 2:59 am
... wonder ... I also have never worked with SMT. I'm in the process now of learning about it and expect to be experimenting soon. One resource that I have...
