Key Features for L.V. – P.C. Board Mount – Universal :

• Universal operation – dual primary. 115 or 230 VAC, 50/60 Hz current.
• 14 output voltages to choose from (5 – 36 VAC R.M.S.)
• Six VA size models available from – 2.5 to 56VA.
• Low profile, split bobbin with top shroud design.
• Dual winding secondaries, non-concentrically wound
• Low primary to secondary coupling – no electrostatic shield required.
• High insulation – Hipot of 4,000V RMS.
• Class F insulation – 155 degrees C.
• Two hole mounting on 2.5, 5, 10 and 20VA sizes, four hole mounting on 30 and 56VA size (mounting screws not provided).
• P.C. board mount with industry standard pin spacing.
• CSA certified (# LR3902) and UL recognized UR (# E50394).
• Parts noted below with blue YES are stocked with extended Euro listings (c UR us, CE and TUV). See photo below.
• For connection information see our PDF file download (274K).

SILICON NPN RF POWER TRANSISTO

DESCRIPTION: The MRF237 is
designed for large signal power
amplifier applications operating to
225 MH

SILICON NPN RF POWER TRANSISTO in MbotenGaptek :

• Tips in Planning Home Design Ideas
• SoundHound for Android
• Wordprees in Android

A simple thermistor triggered switch with adjustable threshold. It triggers with cold temperatures so may be used as a frost alarm or cold temperature switch.

Schaltung Hinweise
Der Thermistor eingesetzt hat einen Widerstand von 15k bei 25 ° C und 45k bei 0 ° Celsius. Eine geeignete Bead Thermistor kann in der Maplin Katalog. Die 100k Pot ermöglicht diese Schaltung zur Auslösung über einen weiten Temperaturbereich.

Wenn Sie eine andere Thermistor dann die Steuerung sollten die neuen Thermistor an seinem höchsten Widerstand übereinstimmen oder höher sein Wert. Der Operationsverstärker in dieser Schaltung ist die allgegenwärtige 741. Es wird als LM741, CA741 etc können katalogisiert werden, werden alle Typen. In dieser Schaltung ist es als Komparator verwendet. Der nicht-invertierende Eingang (Pin 3) ist die halbe Versorgungsspannung vorgespannt ist. Der invertierende Eingang ist mit dem Verbindungspunkt des Thermistors und Potentiometer verbunden. Die Steuerung ist so eingestellt, dass die Schaltung auf, wenn der Thermistor ist bei der erforderlichen Temperatur liegt. Sobald der Thermistor ist außerhalb des Temperaturbereichs seinen Widerstand ändert sich und die Op-Amp-Ausgang wechselt von der Nähe Vollversorgung auf etwa 1 oder 2 Volt DC. Es ist nicht genügend Spannung, um den Transistor schalten und das Relais wird nicht an.

Eine geringe Menge der Hysterese wird durch Einbeziehung der 270k Widerstand vorgesehen. Dies verhindert ein schnelles Umschalten der Schaltung, wenn die Temperatur in der Nähe der Schaltschwelle.

Silk Screen
The top (component) layer is shown below. Drawn on the silk drawn are component outlines and component references.

The schematic drawn is kicad is shown below to match PCB component references.
Silk Screen
Below is an actual size (1:1) view of the copper layer. It is advisable to print this off first on paper and then see if the outline of components matches the physical side. Of particular importance is the relay. A relay with 2 changeover contacts is used. This relay is made by Finder Electronics type 40.52. PDF brochure with physical dimensions.
 Other Post in MbotenGaptek :

• FM Stereo Transmitter
• Rangkaian Receiver 136 KHz
• Rangkaian Repeater Otomatis

SubSonic Music is a free application, web-based media streamer, providing access to several places for your music. This application can also be used to share music with friends, or to listen to your own music in the workplace. You can stream playback simultaneously, meaning that this application for simultaneously in different places.
Subsonic is designed to store a very large music collection (up to hundreds of gigabytes). Although optimized for MP3 streaming, this application also works for any audio or video format that can stream over HTTP, for instance AAC and OGG. By using transcoder plug-ins, Subsonic supports direct conversion and streaming of virtually all audio formats, including WMA, FLAC, APE, Musepack, WavPack and Shorten.If you have limited bandwidth, so you can set the upper limit for the bitrate music. Subsonic will then automatically adjust the bitrate of music that has been appropriate.
In addition to being a streaming media server, Subsonic works very well as a local jukebox. Between the web interface itself, as well as search and index facilities, are optimized to search for music via the media library is very large. Subsonic also comes with an integrated Podcast receiver with many of the same features as you find in iTunes.
this application based on Java technology, Subsonic runs on most platforms, including Windows, Mac, Linux and Unix variants, this application also licensed GPL (General Publick license).