Hobby Electronics Basics

[OT] RadioShack declares bankruptcy

Nearly a century after it opened its first store and sent out its first catalog, RadioShack (RSHC) declared bankruptcy...

23 comments posted 11yrs

posted by toylet.toylet

23 comments posted 11yrs posted by toylet.toylet

Chinese Germanium 1N34

So I got a bunch of these from China for a couple dollars. How can I tell they are not fakes and does it matter if I'm...

74 comments posted 11yrs

posted by mhdpublic

74 comments posted 11yrs posted by mhdpublic

Serial Breakout Box

Looking for an inexpensive (less that $100) serial RS232 breakout box. Can set BAUD, etc and then receive serial data....

3 comments posted 11yrs

posted by Rolf

3 comments posted 11yrs posted by Rolf

What ever happened with the come back of Heathkit?

Some time back there were rumors and a website regarding bringing back Heathkit or similar. As I recall it even asked w...

19 comments posted 11yrs

posted by RR

19 comments posted 11yrs posted by RR

[OT] RadioShack suspended from NYSE as bankruptcy looms

Summary: RadioShack shares have been suspended from trading on the New York Stock Exchange (NYSE) even as it continues...

15 comments posted 11yrs

posted by toylet.toylet

15 comments posted 11yrs posted by toylet.toylet

OT: Shop trying to force a return

Since around mid-2014, Chinese manufacturer Xiaomi has been enjoying a huge success here in India selling mid-range mob...

3 comments posted 11yrs

posted by Pimpom

3 comments posted 11yrs posted by Pimpom

GLCD CM12864-2 wont work

Hi, II have a graphic lcd (Cm12864-2). Wandering if someone could help me out. The screen turns on and the backlight to...

2 comments posted 11yrs

posted by lerameur101

2 comments posted 11yrs posted by lerameur101

DC-DC converters basic topologies online simulations

DC-DC converters are essential power supply circuits for modern electronic equipment today. Five basic topologies are r...

0 comments posted 11yrs

posted by pchung705

0 comments posted 11yrs posted by pchung705

Capacitor as a power supply

This is more of a thought experiment triggered by handling of a huge cap. Would it be possible to charge a big cap and...

9 comments posted 11yrs

posted by mhdpublic

9 comments posted 11yrs posted by mhdpublic

Battery Selection

I need to run my laptop for many hours and in a mobile state; i.e. no AC Power available not car available. I have a En...

5 comments posted 11yrs

posted by OldGuy

5 comments posted 11yrs posted by OldGuy

Relacement for SCR

Have immediate needs for SCR for a latching alarm circuit. Unable to source locally. Only RS and they don't have them....

33 comments posted 11yrs

posted by strmbrgr2

33 comments posted 11yrs posted by strmbrgr2

Your favorite battery supplier or seller?

I'm impressed by the number of clearly illegitimate battery deals on Amazon. Some of them are obviously too good to be...

9 comments posted 11yrs

posted by always.look

9 comments posted 11yrs posted by always.look

Injection-Locked Oscillators

Where can I find a good tutorial on Injection-Locked Oscillators? All I can find are application-specific papers, and I...

9 comments posted 11yrs

posted by To-Email-Use-The-Envelope-Icon

9 comments posted 11yrs posted by To-Email-Use-The-Envelope-Icon

Partial-Fraction Expansion?

Someone please refresh my memory... Isn't there some easy way to do a "partial-fraction expansion" of a transfer functi...

12 comments posted 11yrs

posted by To-Email-Use-The-Envelope-Icon

12 comments posted 11yrs posted by To-Email-Use-The-Envelope-Icon

OT: Wall Stud Locating

See... I had been using the Magcraft magnets to locate wall studs, but they're nasty to get apart and hard to hold onto...

18 comments posted 11yrs

posted by To-Email-Use-The-Envelope-Icon

18 comments posted 11yrs posted by To-Email-Use-The-Envelope-Icon