Hobby Electronics Basics

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DVB-RCS and DVB-S2?

Satellites... I can't seem to differentiate between DVB-RCS and DVB- S2. According to the fact sheet, DVB-RCS is a stan...
0 comments posted 16yrs
posted by mr.whatever
0 comments posted 16yrs posted by mr.whatever

Discharge a huge voltage

hello, I have a very simple circuit here, I am charging a 900uF capacitor to 600v. (900v max capacity) I want to discha...
26 comments posted 16yrs
posted by lerameur
26 comments posted 16yrs posted by lerameur

Resistor for neon indicator lamp

I've got a tankless electric water heater from eemax. that stopped working the other day. eemax won't provide any compo...
28 comments posted 16yrs
posted by ggherold
28 comments posted 16yrs posted by ggherold

PC oscilloscope for Linux

Hi, is there any PC Oscilloscope for which there exist Linux software under BSD or GPL or similar license? Naturally if...
2 comments posted 16yrs
posted by klaine8
2 comments posted 16yrs posted by klaine8

Help: Making Project boxes

I need some project boxes and was hoping to get advice on how to make them. I ruled out metal because small PCBs will b...
20 comments posted 16yrs
posted by Searcher7
20 comments posted 16yrs posted by Searcher7

neg ldo problems

I'm guessing I'm missing the obvious here. I'm trying to build a discrete negative LDO using a NFET for the pass elemen...
2 comments posted 16yrs
posted by spam
2 comments posted 16yrs posted by spam

Flyback poor regulation

I built a 10W multi-output flyback all of my outputs are reasonable except one my -12V output, it varies widely over li...
2 comments posted 16yrs
posted by spam
2 comments posted 16yrs posted by spam

ckt using LDR

hi, I'm planning to work with a simple ckt. Just have only few ideas about the ckt. following are the details: the ckt...
2 comments posted 16yrs
posted by itzneona
2 comments posted 16yrs posted by itzneona

PCB toner transfer etchants

I've been reading up on this and the consensus is that ferric chloride is the most common compound to do the actual "et...
14 comments posted 16yrs
posted by brumfield47FAKEPART
14 comments posted 16yrs posted by brumfield47FAKEPART

Transistor question -theory

Hi, I have been analyzing the 'how to' of a transistor recently. Electron flow, holes, dope material etc... I still do...
9 comments posted 16yrs
posted by lerameur
9 comments posted 16yrs posted by lerameur

What for the "D" in a PID control loop?

I=92ve built several PID control loops, mostly for temperature control, but sometimes for other things. I=92ve always u...
13 comments posted 16yrs
posted by ggherold
13 comments posted 16yrs posted by ggherold

18650 li-ion

Could some one explain the protection mechanism on some 18650 li-ion batteries and why they do not work with some xenon...
1 comments posted 16yrs
posted by haggisz
1 comments posted 16yrs posted by haggisz

Load Capacitance

Hello Everyone, I have a couple of surplus crystals, 10.7 MHz. Is there a way to find out the Load Capacitance for them...
5 comments posted 16yrs
posted by NOwaynerrSPAM
5 comments posted 16yrs posted by NOwaynerrSPAM