Difference between revisions of "VFO-003"
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| Line 14: | Line 14: | ||
** SSD1306 OLED Display | ** SSD1306 OLED Display | ||
*** I2C Interface | *** I2C Interface | ||
| − | ** | + | ** Rotary encoder selected menu options |
| − | ** 1Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable) | + | ** Select between 3 VFOs |
| + | *** Adjust frequency | ||
| + | *** Step sizes: 1Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable) | ||
| + | *** Adjust frequency accuracy to 0.01 Hz precision | ||
| + | *** Turn VFO Off/On (Off = 3.3V) | ||
| + | *** Save default values which are loaded at power up | ||
* Si5351A Oscillator | * Si5351A Oscillator | ||
** 3 Outputs | ** 3 Outputs | ||
** 27 MHz TCXO crystal | ** 27 MHz TCXO crystal | ||
| − | |||
** I2C Interface | ** I2C Interface | ||
* 3.3V, 50 Ohm output | * 3.3V, 50 Ohm output | ||
Revision as of 14:36, 12 October 2021
Features
Software controlled VFO
- Arduino Pro Mini Microprocessor
- 8-bit ATMEGA328 CPU
- 8 MHz
- 3.3V I/O
- Detachable Rotary Encoder/OLED card
- SSD1306 OLED Display
- I2C Interface
- Rotary encoder selected menu options
- Select between 3 VFOs
- Adjust frequency
- Step sizes: 1Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable)
- Adjust frequency accuracy to 0.01 Hz precision
- Turn VFO Off/On (Off = 3.3V)
- Save default values which are loaded at power up
- SSD1306 OLED Display
- Si5351A Oscillator
- 3 Outputs
- 27 MHz TCXO crystal
- I2C Interface
- 3.3V, 50 Ohm output
- Power
- MINI-360 DC/DC Buck regulator
- 7-24 VDC
- Fits in standard extruded enclosures
Arduino Pro Mini
Connectors
J1 - OLED
- SDA
- SCL
- Vcc
- GND
J2 - Display Encoder/OLED (Display card)
- Encoder A
- Encoder B
- Encoder Switch
- SCL
- SDA
- Vcc
- GND
J3 - Display Encoder/OLED (Main card)
- Encoder A
- Encoder B
- Encoder Switch
- SCL
- SDA
- Vcc
- GND
J4 - FTDI
Can install 1x6 header on the Arduino Pro Mini and not install this
- GND
- GND
- Vcc
- RX
- Tx
- DTR
J5 - Arduino A0-A3/C10-D13
- A3
- A2
- A0
- D13
- D12
- D11
- D10
- Vcc (not connected on Rev 1 PCB)
- GND (not connected on Rev 1 PCB)
J6 - Disconnect for Mini-360 Power Supply
- The Mini360 Buck Converter comes adjusted for a very high output voltage
- Remove jumper to adjust the output voltage to 3.3V without powering the rest of the card
- Install to power the card from the power supply
J7 - Output disconnects
- Cut rear side trace to disconnect
- Can be used to install external LP filters
- Limited use due to 74AC14 drivers
J7 - Arduino P5-P9
- P5
- P6
- P7
- P8
- P9
- Vcc
- GND
Schematic
Software
Mechanicals
