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C2 CMOS IAMBIC Keyer/Controller Chip
| NOTICE: Radio Adventures is currently in the process of moving its manufacturing facilities to a new location. Therefore we are not able to accept new orders until probably late October. We appreciate your interest in our products and apologize for any inconvenience. |
Introduction
The Radio Adventures Co. C2 advanced CMOS Iambic Keyer/Controller is a high performance, low cost preprogrammed microcontrollers specifically developed for the amateur and commercial communications markets.
The C2 combines iambic keying functions with timing and sequencing features in a single chip and provides a convenient way to key and control home built and commercial transmitters and transceivers. In addition to iambic keying features, the C2 also supports the use of a straight key, a semi-automatic key (bug) and a unique autospace mode on the straight key input.
Features
- Iambic A and B operation, selected by raising or lowering the MODE pin.
- Speed range is continuously adjustable over the range of 10 to 40 WPM and is based on an RC network using a linear taper potentiometer. Speed increments are nicely spaced for good resetability.
- Adjustable Sidetone. The C2 series provide adjustable sidetone output sufficient to drive headphones or an efficient speaker. The frequency is variable from approximately 500 hz to 1 Khz.
- Built-in Transmit sequencer. Two outputs are available to provide full break-in keying control. When any key is closed, the ANT pin goes high 5.5 mS before the TX pin goes high. When an element is complete, the TX pin goes low immediately. 5.5 mS later the ANT pin is lowered. This sequencing provides for antenna transfer, VFO shifting, receiver muting and transmitter keying in full break-in mode.
- Straight Key Mode. A separate input is provided for a straight key, tune switch or bug. When the SK input is held low the transmitter is keyed. If the autospace feature is selected, spaces, the length of which is determined by the speed control are inserted after each key opening. If autospace is disabled, spaces are not inserted after each key opening. In all cases, the key closure and key opening is debounced. This is especially useful when using a bug with modern high transfer speed full break-in rigs.
- Full CMOS Technology. The C2 operates over the range of 3 to 6 volts, 0 to 70 degrees C. Without sidetone, operating current is approximately 2 mA and idle current is approximately 1 mA. Operating current may be slightly higher when the sidetone is producing full output or when driving keying and control transistors.
- High Output Drive. The C2 provides more than 10 mA output current which is adequate to directly drive switching transistors and the sidetone monitor speaker through a matching transformer.
Pricing/Ordering
|
Description |
Price |
|---|---|
| C2 CMOS Iambic Keyer Chip w/ 2.0 MHz resonator, DIP-18 | $9.95 |
