Model Electronics

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" height=100 BGCOLOR="#FFCCB2" TEXT="#080000"> <bR> <div> <B> <TABLE BORDER="2" CELLPADDING="2" CELLSPACING="1" WIDTH="632" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 18 WIDTH="84"><div> <A HREF="index.htm" TARGET="_top" TITLE="Home Page"><U><B>Home Page</B></U></A></div> </tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id18.htm" TARGET="_top" TITLE="Contact Us"><U><B>Contact Us</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="77"><div> <A HREF="id24.htm" TARGET="_top" TITLE="Map Page"><U><B>Map Page</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="92"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="18" ALIGN="bottom" WIDTH="92" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="68"><div> <A HREF="id17.htm" TARGET="_top" TITLE="Calendar"><U><B>Calendar</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="100"><div> <A HREF="id41.htm" TARGET="_top" TITLE="Flight Sim"><U><B>Flight Sim</B></U></A></div> </tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id50.htm" TARGET="_top" TITLE="Indoor Flying"><U><B>Indoor Flying</B></U></A></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 17 WIDTH="84"><div> <A HREF="id27.htm" TARGET="_top" TITLE="Members "><U><B>Members </B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="77"><div> <A HREF="id30.htm" TARGET="_top" TITLE="Photos"><U><B>Photos</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="77"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="17" ALIGN="bottom" WIDTH="77" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id32.htm" TARGET="_top" TITLE="For Sale/Wanted"><U><B>For Sale/Wanted</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id53.htm" TARGET="_top" TITLE="Scale Day"><U><B>Scale Day</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id42.htm" TARGET="_top" TITLE="Members Letters"><U><B>Members Letters</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id65.htm" TARGET="_top" TITLE="Construction"><U><B>Construction</B></U></A></div> </NOBR></tD> </tR> </TABLE></B></div> <bR> <bR> <div> </div> </td> </tr><tr> <td valign="top" height=380 BGCOLOR="#FFCCB2" TEXT="#080000"> <div> <U> <A NAME="model_electronics"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A></U><U>Model Electronics</U></div> <bR> <div> <A HREF="electronics2b.htm" TARGET="_top" TITLE="Versatile NiCad trickle charger"><U><B><U>Versatile NiCad trickle charger</U></B></U></A><B><U> </U></B><B>                                                                  </B><A HREF="electronics2c.htm" TARGET="_top" TITLE="Lead Acid Battery Charger"><U><I><B><U>Lead Acid Battery Charger</U></B></I></U></A><I><B>                                                </B></I><A HREF="servo_driver.htm" TARGET="_top" TITLE="Servo Driver"><U><I><B><U>Servo Driver</U></B></I></U></A></div> <bR> <bR> <DIV ALIGN="LEFT"></DIV> <div> The lost model alarm project is the first to be published and should keep you " Electronic Constructors " Busy for a short while ? .</div> <div>  ... Have Fun  ...Ken... </div> <bR> <div> <I><B><U>Lost model alarm </U></B></I>  This unit is Both simple and cheap to make , It could well prove useful if last years crops of maize are repeated . (We nearly lost Ron shone last summer) . The unit is equipped with and old servo lead , and simply plugs in a spare receiver channel . If the worst should happen and the model disappears , all you have to do is switch off your transmitter and the alarm will sound continuously , Being a high frequency alert the sound carries well .</div> <bR> <DIV ALIGN="LEFT"></DIV> <div> <U><IMG SRC="14968c80.jpg" border=0 width="616" height="200" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></div> <bR> <bR> <div> <FONT SIZE="3" COLOR="#111111" FACE="Arial" ><I><B><U>Veroboard Layout </U></B></I></FONT><I><B>    Left </B></I><I>Looking from the top component side                 And </I><I><B>Right</B></I><I>  Looking  from the copper side..</I></div> <div> <U><IMG SRC="14cbce10.jpg" border=0 width="700" height="225" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></div> <bR> <bR> <bR> <div> <FONT SIZE="4" COLOR="#111111" FACE="Arial" ><U><IMG SRC="171902c0.jpg" border=0 width="400" height="300" ALIGN="RIGHT" HSPACE="0" VSPACE="0"></U></FONT>Measuring just 20*20 m/m . It is best to build the module on the corner of a larger piece of veroboard , when completed,The board can be cut down using a razor saw . The single<U> link</U> and the <U>three</U> breaks in the board pattern should be completed at this time .</div> <div> All components are available from Maplins or farnell electronics catalogues .</div> <div> The transistors used can be any general purpose ones two pnp and one npn types..</div> <div> The sounder <U>Must</U> have an internal driver .</div> <bR> <bR> <bR> <bR> <DIV ALIGN="LEFT"></DIV> <div> <I><B><U>A Picture of the prototype</U></B></I></div> <bR> <div> I have just finished installing the prototype in my precedent fun fly .. It's like insurance you hope you never need to use it.. Two interesting side effects have been observed , First the unit will warn of any severe radio interference , Secondly an alarm will sound or be a fairly quiet one , If the servos are rotated whilst the unit is switched off , The servo motor generating enough power to do this from just moving any of the control surfaces manually ,</div> <bR> <div> <FONT SIZE="3" COLOR="#111111" FACE="Arial" >.</FONT><B><U>Component Suppliers Web Site's</U></B>       <A HREF="http://www.maplin.co.uk/mainframe.asp" TARGET="_top" TITLE="http://www.maplin.co.uk/mainframe.asp"><U>Maplin Electronics on line catalogue</U></A>                         <A HREF="http://www.farnell.com/" TARGET="_top" TITLE="http://www.farnell.com/"><U> Farnell Electronics Home Page</U></A></div> <bR> <bR> <bR> <DIV ALIGN="LEFT"></DIV> <div> <A HREF="maplin_order.htm" TARGET="_top" TITLE="Maplin Order Form"><U><I><B><U>Maplin Parts List For lost Model Alarm,</U></B></I></U></A></div> <bR> <bR> <div> Catalogue Page    Part No  Description    Price Inc Vat</div> <div> <A HREF="http://www.farnell.com/" TARGET="_top" TITLE="http://www.farnell.com/"><U>  </U></A></div> <div> 204                            JP46A   Strip Board   1039         0.69</div> <div> 91                              BX 76X   .1uF Capacitor              0.15 </div> <bR> <div> <A HREF="#model_electronics" TITLE="Model Electronics"><U><B><U>Back to Page Top</U></B></U></A></div> <bR> <bR> </td> </tr></table></body>