Multi-Rock II   Don't pay a fortune for crystals - dial up your own! PIC controlled programmable oscillator compatible with FAT5 and RAT5
	[site home]  [projects home] A DDS controlled frequency source for use in FAT5, RAT5 or general purpose experimentation This will be available March 2012. (Planned Feb release has been delayed to allow time to add additional features) :  Basic Features (tbc) Frequency range :  10kHz  - 40MHz Outputs : bi-phase 250mV sine wave and 5V p-p square wave Memories : 48 Tuning rate : 10Hz, 1KHz, 100kHz selectable     Receive Features Osc : Settable IF offset x2 and x4 multiplier (SDR) Display : Settable Display offset     Transmit Features Osc : x2 and x4 multiplier PTT Control : Two pre-tx sequenced outputs with settable delay 0-150ms     Per Channel Two pre-settable independant control outputs for external switching e.g. antenna / pre-amp etc Other features include setting of number of memories available, set start memory, set start tuning rate and frequency calibration. Most parameters can be set globally then modified per channel as required. The project includes an AD9850 DDS chip pre-mounted on its own daughter PCB so you don't have to worry about miniature SMD soldering Multi-Rock II prototype The prototype PCB is shown below. This is a two board design. The top half of the image is the vertically mounted display board onto which the LCD display and the two rotary switches are mounted. The PCB is simply held in position in an enclosure by the threads on the two switches. The lower half of the image is the second PCB which sits horizontally. The two boards are connected together by right angle terminal strips. This lower board contains the PIC processor and the DDS module along with the 5V regulator. There are very few small components to mount, and zero wiring is involved. Multi-Rock II prototype PCB layout