Joule Thief

[d3x0r]

re fast diodes I like these...
http://www.alliedelec.com/search/productdetail.aspx?SKU=70061664  100V 100mA, 5ns $0.043 0.4vf

[SeaMonkey]

re fast diodes I like these...
http://www.alliedelec.com/search/productdetail.aspx?SKU=70061664
100V 100mA, 5ns $0.043 0.4vf

Good suggestion.   For low power applications the small
signal switching diodes can make a difference.

The BAT41 is very attractively priced and a good bargain.

I've often used ordinary Silicon small signal switching
diodes in low power high frequency applications with
good result;  the very common 1N914 or the 1N4148.
(Grazie TinKoa)

The higher powered 1N58xx series do exhibit some
leakage and may not be well suited for high frequency
low power uses but are excellent choices for lower
frequency (less than 100 KHz) circuits such as buck/boost
regulators or desulfators. (Magpwr makes excellent points
above.)

[TinselKoala]

1n914, not 1n941.


1n5817 or 1n5711 would be good choices for common Schottkys that are very close to the desired low Vf.  However... in the magpwr/conradelectro 2sk170 LVJT that I built, I first used a 1n34a germanium diode because I did not have the specified 1n5711 on hand. I think the germanium worked a little tiny bit better.

[Pirate88179]

1n914, not 1n941.


1n5817 or 1n5711 would be good choices for common Schottkys that are very close to the desired low Vf.  However... in the magpwr/conradelectro 2sk170 LVJT that I built, I first used a 1n34a germanium diode because I did not have the specified 1n5711 on hand. I think the germanium worked a little tiny bit better.

TK:

Thanks a lot.  I just ordered 20 pcs of the 1N5817's ($2.50 from Amazon)  Now all I need are the tantalum caps and I will be in good shape.

Thanks also to everyone that responded to my question.

Bill

[Pirate88179]

I just wanted to post a couple of photos of my ND1402's.  Here is one sitting on a dime.  Well, I wanted to build a micro JT so.....

I still can not believe how tiny these things are.

Bill