{"id":558,"date":"2010-10-07T17:03:00","date_gmt":"2010-10-07T12:03:00","guid":{"rendered":"https:\/\/blog.lakelandarc.org\/2010\/10\/rust-remover-for-morse-code\/"},"modified":"2020-03-14T22:18:09","modified_gmt":"2020-03-14T17:18:09","slug":"rust-remover-for-morse-code","status":"publish","type":"post","link":"https:\/\/blog.lakelandarc.org\/2010\/10\/rust-remover-for-morse-code\/","title":{"rendered":"Rust Remover For Morse Code"},"content":{"rendered":"<div>So you want to sharpen those rusty Morse code skills. Short of humming <span>dits<\/span> and <span>dahs<\/span> you might want to generate some sounds using a key. We all remember those buzzers we used as kids. They were basically door bells with the hammer removed, and didn&#8217;t produce a very realistic sound. Today, by replacing the old door buzzer with a piezo buzzer we can utilize the same simple series circuit to produce a much more pleasant tone. Piezo buzzers are found in things like microwave ovens that signal when you coffee is warm, and can be purchased for as little as a dollar. If you have a HF radio, and don&#8217;t mind being tied down to it,  most of these allow you to send code to your speaker only, and make good code practice oscillators. Or, you might want to build a code oscillator utilizing one of the oldest, and still very popular integrated circuits the 555 timer.<\/p>\n<p>Don <span>Jeerings<\/span> was kind enough to supply the following circuit and parts list. It is certainly a more complicated approach than an electro magnet or piezo buzzer in series with a key and battery, but if you are interested in learning more about the 555 timer, and dusting off those soldering skills the extra effort is justified.<\/p>\n<p><strong>Here is the parts list:<\/strong><\/p>\n<p>1, 9 volt battery connector<br \/>2. Resistor, 689 ohm (in stock<br \/>3, Resistor 1 K (in stock)<br \/>4. Resistor 10 K 5, pot<br \/>5. 25 K (pitch control)<br \/>6. pot 500 ohm (volume control)<br \/>7. Condenser 0.22 <span>Mfd<\/span><br \/>8. Condenser 10 <span>Mfd<\/span><br \/>9. Speaker 8 ohm $1.29 (<span>Jameco<\/span>)<br \/>10 <span>IC<\/span> chip 555 timer<br \/>11 8 pin dip socket<br \/>12 Key jack<br \/>13 Substrate of some sort to mount the above equipment <\/div>\n<div> <\/div>\n<p><img decoding=\"async\" style=\"TEXT-ALIGN: center; MARGIN: 0px auto 10px; WIDTH: 320px; DISPLAY: block; HEIGHT: 249px; CURSOR: hand\" id=\"BLOGGER_PHOTO_ID_5525276948200180706\" border=\"0\" alt=\"\" src=\"http:\/\/4.bp.blogspot.com\/_PspauYEL0uc\/TK26HDcgS-I\/AAAAAAAAAd4\/OnQPRjbTJT8\/s320\/circuit.gif\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>So you want to sharpen those rusty Morse code skills. Short of humming dits and dahs you might want to generate some sounds using a key. We all remember those buzzers we used as kids. They were basically door bells with the hammer removed, and didn&#8217;t produce a very realistic sound. Today, by replacing the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-558","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/posts\/558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/comments?post=558"}],"version-history":[{"count":1,"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/posts\/558\/revisions"}],"predecessor-version":[{"id":1196,"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/posts\/558\/revisions\/1196"}],"wp:attachment":[{"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/media?parent=558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/categories?post=558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.lakelandarc.org\/wp-json\/wp\/v2\/tags?post=558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}