Hobby Electronics Basics

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HC4046 VCO Spice Model Updated

The HC4046 VCO Model on my website has been updated with a behavioral version (the device-level version is still includ...
0 comments posted 12yrs
posted by To-Email-Use-The-Envelope-Icon
0 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

Paparazzi drones

I suspect that little more than a dish antenna and a spark plug is required to over-ride the radio control of these thi...
11 comments posted 12yrs
posted by dewhurst.roger
11 comments posted 12yrs posted by dewhurst.roger

HID ballasts: AC or DC?

Some of the vendors of automotive HID light conversion kits are saying that AC voltage ballasts are superior to DC ball...
8 comments posted 12yrs
posted by fbt
8 comments posted 12yrs posted by fbt

TD2003 Spice Model Posted to my Site

A preliminary cut to a TD2003 Spice Model has been posted to my website... ...Jim Thompson -- | James E.Thompson | mens...
5 comments posted 12yrs
posted by To-Email-Use-The-Envelope-Icon
5 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

2000 Ford Ranger starting problem

I've had this intermittent problem for over a year now where I turn the key and nothing happens. No click from the sole...
17 comments posted 12yrs
posted by bperryb
17 comments posted 12yrs posted by bperryb

Transistor substitution

Want to breadboard small circuits from mid 1960's magazine articles. Where on the web can I find today's equivalents fo...
25 comments posted 12yrs
posted by ivanvegvary
25 comments posted 12yrs posted by ivanvegvary

Visibility-duty cycle relation with LEDs

I want to make a 1W red LED blink at ~1 Hz. Providing the best possible visibility from a distance is vital and takes p...
9 comments posted 12yrs
posted by Pimpom
9 comments posted 12yrs posted by Pimpom

Current mode control

Current mode control is the fastest control method for switching mode power supply since it has to feedback loops. Read...
0 comments posted 12yrs
posted by pchung705
0 comments posted 12yrs posted by pchung705

Step-down transformer backward?

I have this transformer: http://www.signaltransformer.com/sites/all/pdf/M4L.pdf model M4L-2-10, 210/230/250 primary wit...
35 comments posted 12yrs
posted by fbt
35 comments posted 12yrs posted by fbt

Analog Switch

Anyone know of an analog switch that can handle -6V to +11V inputs (low current, high Ron OK), +/-12V supplies? ...Jim...
7 comments posted 12yrs
posted by To-Email-Use-The-Envelope-Icon
7 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

Randomiser circuit from John Fields

I've just received the following email asking about a 9 year old thread. ==================== Hello. Found one old thre...
2 comments posted 12yrs
posted by terrypingm
2 comments posted 12yrs posted by terrypingm

I need help understanding!!

Help, I found a calculation I am having trouble with. I have a poor background in math and would like to understand in...
18 comments posted 12yrs
posted by jweigh
18 comments posted 12yrs posted by jweigh

Ping: Robert Macy

Did you survive the flooding in New River? Out here in the East Valley all we got was a nice day-long steady rain. ...J...
1 comments posted 12yrs
posted by To-Email-Use-The-Envelope-Icon
1 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon

New Behavioral Spice Model Posted

A convenient element to approximate input-referred noise in an OpAmp Spice model. Just insert in series with one input,...
1 comments posted 12yrs
posted by To-Email-Use-The-Envelope-Icon
1 comments posted 12yrs posted by To-Email-Use-The-Envelope-Icon