Hobby Electronics Basics

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Headphone recs please

I always thought that earbuds would not be able to supply very good sound quality so I never spent much money on them b...
3 comments posted 10yrs
posted by etpm
3 comments posted 10yrs posted by etpm

What's the point of a gain of 1 amp?

I ordered the headphone amp from Oatley Electronics and it arrived yesterday. Reading the instructions and the explanat...
7 comments posted 10yrs
posted by etpm
7 comments posted 10yrs posted by etpm

smps with a fixed duty cycle?

The classic linear power supply (transformer, bridge rectifier, cap) relies on AC at a fixed frequency of 60 Hz (50 Hz...
8 comments posted 10yrs
posted by mrdarrett
8 comments posted 10yrs posted by mrdarrett

smps: AC or pulsed DC fed into transformer?

It seems to me that flyback SMPSes use pulsed DC instead of AC. Is this true? For example, here, the transistor simply...
26 comments posted 10yrs
posted by mrdarrett
26 comments posted 10yrs posted by mrdarrett

Is anybody posting here?

Subject says it all. I have seen no posts recently and am wondering if maybe I goofed up and somehow got Agent to filter...
9 comments posted 10yrs
posted by etpm
9 comments posted 10yrs posted by etpm

OT: Ted Scuz Campaign

The Ted Scuz Campaign has now impugned Trump's wife... (1) Posed Nude (2) Foreign Born (first this century... to avoid...
5 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
5 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

SMPS for powering headphone amp?

I orderd the K272c headphone amp kit from Oatley Electronics. See link: http://secure.oatleyelectronics.com//product_in...
13 comments posted 10yrs
posted by etpm
13 comments posted 10yrs posted by etpm

OT: Vacuum Sealing Food

As my newest assignment is now chief cook and bottle-washer I note a problem... We don't eat all that much, so, for exa...
23 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
23 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

daily quiz

What is the dynamic range of a 3-bit A/D converter? I predict no one will get this. Which makes it a good job interview...
14 comments posted 10yrs
posted by r_delaney2001
14 comments posted 10yrs posted by r_delaney2001

OT: Skype Whiteboard / IDroo

A client wants to use Skype Whiteboard / IDroo. Looks gruesome to do sketches with a mouse :-( Years ago I remember a t...
10 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
10 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

Anyone made their own LED lamp?

Anyone made their own LED lamp? Remember this post... Well it just croaked and I bought an adapter to get a conventiona...
40 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
40 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

Current Sources

Hi all, Under what circumstances would you use a current source in a spice simulation as opposed to a voltage source? th...
7 comments posted 10yrs
posted by cbx
7 comments posted 10yrs posted by cbx

OT: DVD/CD Mfg Identifier

I used to have a tool on an old PC that could ID the manufacturer of DVD's and CD's I can't track it down. Anyone have...
1 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
1 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon

Resistor ratios

Hi all, I'm making this current output in fixed ratio's... 1,2,4... etc. I'm using 0.1% RG series from susumu. There ar...
21 comments posted 10yrs
posted by gherold
21 comments posted 10yrs posted by gherold

AN: Debounce Switches

I have made a compilation of the various Debounce circuits and posted it to Debounce_Switches.pdf on the S.E.D/Schemati...
34 comments posted 10yrs
posted by To-Email-Use-The-Envelope-Icon
34 comments posted 10yrs posted by To-Email-Use-The-Envelope-Icon