Hobby Electronics Basics

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Cluster Intel Bomb

Small video and audio transmitters stuffed into what looks like mundane Mideast street trash, i. e. food wrappers, piec...
7 comments posted 20yrs
posted by BretCahill
7 comments posted 20yrs posted by BretCahill

Encoder TTL pulse train multichannel repeater

Hello, I am working with a 5V train pulse encoder (Scancon), and I would like to use this same signal in some different...
2 comments posted 20yrs
posted by helola
2 comments posted 20yrs posted by helola

Working with SMT components

Does anyone here have any "hints" when working with SMT? I haven't tried to use it yet but I have hundreds of cool comp...
8 comments posted 20yrs
posted by Abstract.Dissonance
8 comments posted 20yrs posted by Abstract.Dissonance

Switching regulator: wide range load current

Hello, I am using the switching regulator (LM2592HV-5.0 from national) in a battery-powered evaluation board. Vin = 12V...
0 comments posted 20yrs
posted by jidan1
0 comments posted 20yrs posted by jidan1

Stepping-up Voltage

Hi there, I'm looking to build an adaptor to enable me to use my 7.2V batteries (6AH Li-ion) to power 12V devices. The...
13 comments posted 20yrs
posted by epicedium
13 comments posted 20yrs posted by epicedium

Quick Capacitance Testing Help

Greetings. I need some quick help on this easy question. I am testing capacitors in the power supply and other sections...
4 comments posted 20yrs
posted by bradgentry
4 comments posted 20yrs posted by bradgentry

Op-amp transfer function help

Hello Group, I need some tips on the deviration of a transfer function for an op-amp circuit that is in "Troubleshootin...
3 comments posted 20yrs
posted by waynelittle
3 comments posted 20yrs posted by waynelittle

Power supply

I hope this isn't too dumb a question. I have an IC that requires a +5 and -5 volt supply. My method would be to use a...
4 comments posted 20yrs
posted by Periproct
4 comments posted 20yrs posted by Periproct

74LS193 Cascading Question

Hi All, I've successfully cascaded 4 of the 74LS193 binary up-down counter chips to count up to full, off a 555 oscilla...
12 comments posted 20yrs
posted by bborb
12 comments posted 20yrs posted by bborb

Quartz Crystal stability?

Anybody have an idea on the frequency stability of older large low frequency quartz crystals compared to the stability...
5 comments posted 20yrs
posted by wrongaddress
5 comments posted 20yrs posted by wrongaddress

PIC program question

I have a question for the PIC programmers among you. I'm programming a PIC18F2455, and I tried the code segment below t...
10 comments posted 20yrs
posted by randy.day
10 comments posted 20yrs posted by randy.day

Home brew lab hotplate

I'm thinking of making a small hotplate for the purpose of heating PCB etchant, and possibly to keep the tank up to tem...
20 comments posted 20yrs
posted by a
20 comments posted 20yrs posted by a