Hobby Electronics Basics

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mosfet circuit - need feedback?

Hi, I'm trying to implement (in spice) some small circuits I've seen in lectures. I'm hoping that someone can confirm m...
6 comments posted 19yrs
posted by tedthornton
6 comments posted 19yrs posted by tedthornton

spectra physics 255 exciter and laser

We have one of these at the University I am attending, and it seems to have stopped working. My professor was going to...
14 comments posted 19yrs
posted by nuisancewildlife
14 comments posted 19yrs posted by nuisancewildlife

Heat a Two Car Garage -- Quartz Heaters

I have an elderly neighbor who likes to work in his garage, and likes it warm. He's had a kerosene heater and now a pro...
25 comments posted 19yrs
posted by wolf_tracks
25 comments posted 19yrs posted by wolf_tracks

question

I'm trying to modify a circuit where a tone detector is sending a signal to another device that will read this output a...
3 comments posted 19yrs
posted by kd6532
3 comments posted 19yrs posted by kd6532

am I hooking up Oscope correctly

Hi, I just bought a mini-circuits zx60-8008 amplifier and am experimenting wth it a little. I need to find out if I am...
5 comments posted 19yrs
posted by letron_2000remove_this
5 comments posted 19yrs posted by letron_2000remove_this

Transistor Optocoupler MCU Switch

I created a sort of 'MCU controlled power switch' for AC power source based on the deseigns here: http://www.signindust...
5 comments posted 19yrs
posted by onlinefuel
5 comments posted 19yrs posted by onlinefuel

Question RE variable caps

I need to hook two variable caps in series, so as to add their values rather than dividing them. Only I can't quite pic...
13 comments posted 19yrs
posted by db5151
13 comments posted 19yrs posted by db5151

Putting in a ground for a plasma cutting table

They were initially quoted 12,000 dollars to put one in. If that wasn't high enough now they are wanting $120,000. It i...
8 comments posted 19yrs
posted by clannorm
8 comments posted 19yrs posted by clannorm

Project Management Tools

Project Management Processes,Ten Tips for Managing a Project... http://flying-rugs.com/project-management
0 comments posted 19yrs
posted by process.business
0 comments posted 19yrs posted by process.business

PICs and Crystals

Hello, I've got a PIC16F627 and two crystals. One is 12MHz, the other is 20MHz. The 12MHz one says it needs a load cap...
6 comments posted 19yrs
posted by garethrichardadams
6 comments posted 19yrs posted by garethrichardadams

Is this 'Ghetto Electronics'?

I like messing with electrical components - scavenging and making stuff out of junk. I have never studied electronics p...
3 comments posted 19yrs
posted by r3bol
3 comments posted 19yrs posted by r3bol

Finding the input resistance of an op amp?

Sorry for all the questions. I'm just curious. In reading, Texas Instrument's Single Supply Op Amp Circuit Collection g...
20 comments posted 19yrs
posted by mr.whatever
20 comments posted 19yrs posted by mr.whatever

Hybrid audio bi-amps

I have a Pansonic stereo system with separate high and low speaker terminals. There is only one stereo power amp ... th...
1 comments posted 19yrs
posted by charleschuler
1 comments posted 19yrs posted by charleschuler