Saturday, September 30, 2017

Online circuit simulators

Spice simulators on the web:

http://www.falstad.com/circuit/. Uses javascript,no need for Internet connection,after site is loaded


https://www.multisim.com/create/. Internet required for opening of the site, not for schematic and simulation.

Saturday, May 21, 2016

Tuesday, December 22, 2015

Wednesday, April 29, 2015

Removing magnet wire enamel coating Insulation



3. Using acetylsalicylic acid found in aspirin drug:

[1] Put the wire (end) on top of the aspirin tablet. 
[2] Now using hot soldering iron, press against the wire (and tablet).
[3] Hold for 2-3 sec, then check for removal of coating.
[4] Repeat the process if necessary. 
[5] Clean the wire.
This can be combined with usage of smooth sandpaper (see 2).

Monday, March 23, 2015

Basic Soldering Lessons

Basic Soldering Lessons (1-9) ,youtube playlist:

https://www.youtube.com/playlist?list=PL926EC0F1F93C1837

(Produced by PACE, Inc.)

Tuesday, March 17, 2015

Saturday, November 8, 2014

AC Generator frequency as a function of RPM

w - angular velocity.
f - frequency (number of cycles per second, expressed in Hz).
P - number of poles (= N + S poles. ).
P/2 - number of pole pairs. Above generator example has two poles and one pole pair.
Ns - number of revolutions per second 
Nm - number of revolutions per minute
Nm=60*Ns.

w=2Pi*f = (P/2) * N * 2Pi * 1/sec

f=(P/2)*N/sec
f=(P/2)*Ns

f=(P/2)*Nm/60=P*N/120

f=P*Nm/120