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Currently 10kHz to 15Mhz receiver (with proper BPF) using AD9835 as frequency source, controlled by ATmega644PA (with bootloader). It supports firmware upgrades and filter width (CW/SSB) button selection. IR remote is supported by hardware, software is pending. TX part is under development as will be ICOM CI-V compatible interface.
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Direct Conversion TRX ===================== Author: Martin Sivak <email@example.com> Based on the following projects and books: http://www.qrp.pops.net/popDC.asp http://hem.passagen.se/communication/dds.html EMRFD (http://w7zoi.net) Schematics is in directory sch/ Firmware in directory firmware/ Bootloader in directory bootloader/ Goals ===== - full TRX for HF bands (mainly 40m and 20m) - DDS controlled - RX: direct conversion with switchable attenuator and CW/SSB filter - TX: CW QRP level output (5W) - portable operation - external BPF - PC interface (probably Icom based to make it compatible with existing tools) - IR remote control to supplement integrated buttons Hardware ======== AD9835 DDS (mclk 50Mhz, 14Mhz LPF) ATmega 644PA (int. osc. 8Mhz) standard LCD 16x2, 4bit mode IR demodulator SFH5110-38 rotary encoder 4 buttons