Hobby Electronics Basics

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Old Sony 250 tape recorder meets my TV

My tape recorder is probably 30-40 years old. It plays 4-track tapes. Twenty or so years ago, I had it tuned up. I rece...
5 comments posted 13yrs
posted by wolftracks
5 comments posted 13yrs posted by wolftracks

Where Is the Laser Sinking the Heat?

If anything goes wrong with a non air breathing high energy density battery or any high energy density energy storage m...
5 comments posted 13yrs
posted by BretCahill
5 comments posted 13yrs posted by BretCahill

Distribution Transformer

Distribution transformer aims to provide well tailored-solutions of all kind of voltage dilemma. We walk by holding the...
6 comments posted 13yrs
posted by servokons
6 comments posted 13yrs posted by servokons

S/N Ratio dependent on impedance match?

Why is S/N ratio dependent on impedance match? It would seem a ferrite loopstick antenna would deliver twice the voltag...
11 comments posted 13yrs
posted by bperryb
11 comments posted 13yrs posted by bperryb

Zigbee? RF control questions

Greetings All, I have two 4 axis CNC mills that I would like to add a 5th axis to. The machines are different makes wit...
0 comments posted 13yrs
posted by etpm
0 comments posted 13yrs posted by etpm

4538 monostable input rise/fall restriction

Does the 4538 monostable have any restriction on the rise/fall time of the triggering pulse? None of the datasheets I h...
9 comments posted 13yrs
posted by Pimpom
9 comments posted 13yrs posted by Pimpom

Have 5v regulator need 9 volts

Hi all, Tomorrow I'm working on a power supply to replace a 9v battery. All I have is a *5 volt regulator. I think can...
29 comments posted 13yrs
posted by amdx
29 comments posted 13yrs posted by amdx

Simplex 2400 Not Off Topic

Hello all, My first question: Are there any good ole' Simplex Tech's floating around it here anywhere?? I have a few que...
13 comments posted 13yrs
posted by royboynospam
13 comments posted 13yrs posted by royboynospam

Why the long leads?

Resistors, capacitors, LEDs, etc, when made for soldering into through hole curcuit boards, have really long leads. Why...
17 comments posted 13yrs
posted by etpm
17 comments posted 13yrs posted by etpm

Timing circuit help needed

Installed car seat warmers into SWMBO's car. Key must be on for them to fu nction. Would like to rewire in a way that I...
3 comments posted 13yrs
posted by ivanvegvary
3 comments posted 13yrs posted by ivanvegvary

Viewing circuits in mono-spaced-font

Circuits are posted here (much appreciated) suggesting the use of mono-spaced-font for viewing. I've tried cut/paste in...
12 comments posted 13yrs
posted by ivanvegvary
12 comments posted 13yrs posted by ivanvegvary

Load Leveling With Sea Sequestration

Carbon abatement schemes always seem too much like closing -- or rather not closing -- the barn door while forgetting a...
4 comments posted 13yrs
posted by Bret_E_Cahill
4 comments posted 13yrs posted by Bret_E_Cahill