The maximum current on the keying line is usually no more than a few mA. Most modern rigs are keyed by grounding the key line. Lambic Keyer based on a PIC16F84 or PIC16C84 - This iambic keyer uses a PIC16C84 or PIC16F84 microcontroller to generate the dot/dash timing and key the transmitter. The circuit in figure 1 is based on the famous Curtis family of morse keyer chips and has a proven record of dependability _ Designed by Radio Amateur Society of Norwich This means a paddle is needed as well as some type of keying circuit to drive it. Figure 1 is a simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency _ Designed by Radio Amateur Society of NorwichĮasy Morse Code Keyer - For those amateurs who are planning to learn their code and upgrade, some type of on the air experience is virtually essential for the higher code speeds. _ Designed by Radio Amateur Society of NorwichĮasy FM Keyer - Many no code Technician class amateurs who are struggling to learn 5 WPM code simply do not have any avenue to get the necessary on the air practice. The tone keyer is an ideal alternative and works very well. Although it is possible to connect to a COM port on the back of a PC using a diode-transistor configuration, this results in another precious COM port being used up. _ Designed by Forrest CookĬW Tone Keyer - Recently, I received email from an amateur wishing to key his transmitter from the tone output of a Morse Code generator program. An Arduino processor can also be used in place of this circuit, that eliminates the need to build the circuit and program an EPROM. The message data entered through the computer keyboard is converted to corresponding Morse code and transmitted via the._ Electronics Projects for YouĬW Beacon Keyer - This circuit stores a morse code message as bits in an EPROM chip, the message controls a relay that keys a CW (morse code) transmitter. must register on this site _ Designed by Published in Elecktor July/Aug, 2010Ĭomputerised Morse Code Generator/Transmitter - The circuit given here can be used to send telegraphic messages via computer. resistors R2, R5, and R10 determine a voltage window within which the voltage applied to the junction of D2 and D6 must lie in order for the outputs of IC2. _ Designed by Peter Parker VK3YEĪnalogue Electronic Key - This circuit uses two comparator that are combined in what is called a window comparator, i. Once you know all the characters, the WIA Morse practice broadcasts and/or continuous VHF Morse beacons can be used to increase your receiving speed. This can be accomplished with the help of Morse practice tapes or classes. _ Designed by Herbert DingfelderĪ Two-Way Morse Practice Set - The first step to learning Morse is to be able to memorise the sounds of all letters and numbers. Please let me know if you do a full copy of the design, I would be interested in you practical experiences when operation on the air. If you are a beginner in building you own transceivers you might be able to steal a few of my ideas. Today I would not build a transceiver like I did then, but it was working, so I have kept this page for historical (and sentimental) reasons. ![]() This page was also one of the very first circuit descriptions that I put on the internet quite some years agon. harmonic rejections onprototype were measured at 40dB on 20Mhz and 50dB on 30Mhz _ Designed by Tony van Roon VA3AVRħmhz CW/AM QRP Transmitter - The circuit of a 7MHz C W / A M QRP transmitter described here can be used to transmit either CW or audio frequency modulated signal over a 7MHz carrier.The carrier._ Electronics Projects for YouħMHz QRP Transmitter - This was one of my very first transceiver developments. It is a low-power QRP type and needs to be connected to your existing tranceiver. _ Designed by Peter Parkerģ0-Meter QRP Transmitter for Morse Code - This transmitters' intended purpose is for morse-code only in30 meter band (Tony van Roon's 10Mhz). ![]() _ Designed by Peter Parker VK3YE-first appeared in Amateur Radio, April 1998Ģ-way Morse practice set - The first step to learning Morse is to be able to memorise the sounds of all letters and numbers. ![]() Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors: -Ģ Way Morse Practice Set - The first step to learning Morse is to be able to memorise the sounds of all letters and numbers.
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