compulogy.blogspot.com
Compulogy: Adesso SlimTouch
http://compulogy.blogspot.com/2009/01/adesso-slimtouch.html
توفران مساحة إضافية علي أسطح مكتب المستخدمين. أديسو" تدشن لوحتي مفاتيح جديدتين مزودتين بمنصة (Touch Pad) الفريدة. Adesso SlimTouch Wireless 2.4 GHz. أزاحت شركة "أديسو" المتخصصة في صناعة أدوات الإدخال في أجهزة الحاسبات الشخصية الستار عن أثنين من أحدث منتجاتها من لوحات المفاتيح الجديدة التي تجمع ما بين وظيفة لوحة مفاتيح سطح المكتب العادية والقوة الكامنة لمنصة (Touch Pad) المستخدمة في أجهزة الحاسبات المحمولة . وقد أثارت لوحات المفاتيح الجديدة العديد من النقاش حول مدي استخدامها كبديل لأجهزة "الماوس" التقليدية.
amdsir.blogspot.com
AMDSIR blogger: Testing SCR
http://amdsir.blogspot.com/2008/12/testing-scr.html
This simple SCR tester can be made with only a couple components. It will provide a visual 'go' or 'no-go' indication- it is simply a voltage source, a lamp, and a resistor through which gate current is supplied.". This handy tester will provide a visual "on" or "off" switching and latching indication. When finished, you can test all those posible 'duds' in your junkbox and dump some of those in the garbage. If the scr is latching and can hold the latch it is most likely okay. Q6010L5 (600V/10A) - Tested...
amdsir.blogspot.com
AMDSIR blogger: UJT unijunction transistor
http://amdsir.blogspot.com/2008/12/ujt-unijunction-transistor.html
The equivalent circuit shown in Fig.4 has been developed to explain how the device works, and it is necessary to define the terms used in this explanation. Is known as the interbase resistance. And is the sum of R. NB This is only true when the emitter is open circuit. Is the voltage developed across R. This is given by the voltage divider rule:. Since the denominator of equation 2 is equal to equation 1, the former can be rewritten as:. Is referred to as the intrinsic standoff ratio. And is denoted by.
amdsir.blogspot.com
AMDSIR blogger: ديسمبر 2008
http://amdsir.blogspot.com/2008_12_01_archive.html
A circuit which removes the peak of a waveform is known as a clipper. A negative clipper is shown in Figure below. This schematic diagram was produced with Xcircuit schematic capture program. Xcircuit produced the SPICE net list Figure below. Except for the second, and next to last pair of lines which were inserted with a text editor. D1 0 2 diode. R1 2 1 1.0k. V1 1 0 SIN(0 5 1k). Clipper: clips negative peak at -0.7 V. During the negative half cycle of sinewave input of Figure above. Yields the symmetri...
amdsir.blogspot.com
AMDSIR blogger: Clipper circuits
http://amdsir.blogspot.com/2008/12/clipper-circuits.html
A circuit which removes the peak of a waveform is known as a clipper. A negative clipper is shown in Figure below. This schematic diagram was produced with Xcircuit schematic capture program. Xcircuit produced the SPICE net list Figure below. Except for the second, and next to last pair of lines which were inserted with a text editor. D1 0 2 diode. R1 2 1 1.0k. V1 1 0 SIN(0 5 1k). Clipper: clips negative peak at -0.7 V. During the negative half cycle of sinewave input of Figure above. Yields the symmetri...
amdsir.blogspot.com
AMDSIR blogger: The Silicon-Controlled Rectifier SCR
http://amdsir.blogspot.com/2008/12/silicon-controlled-rectifier-scr.html
The Silicon-Controlled Rectifier SCR. Shockley diodes are curious devices, but rather limited in application. Their usefulness may be expanded, however, by equipping them with another means of latching. In doing so, they become true amplifying devices (if only in an on/off mode), and we refer to them as silicon-controlled rectifiers. The progression from Shockley diode to SCR. Is achieved with one small addition, actually nothing more than a third wire connection to the existing PNPN structure:. Be turne...
