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STD Nano VFO 3

License: GPL 3.0

Mode: Editors' pick

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Update time: 2023-07-12 11:54:38
Creation time: 2020-11-21 17:54:03
Description
## Nano VFO 3 - simple and powerfull digital VFO CPU: Atmega328P PLL: Si5351 and/or Si570 Display: OLED 1.3" 128/132x64, OLED 0.96" 128x64 Encoder: mechanic rotary encode Keypad: 4 buttons Support different TRX architecture: 1\. Single  IF superheterodyne\. 2\. Direct conversion with 2x or 4x output\. 3\. Direct conversion with quadrature output\. Builtin CW key: auto/iambic mode, 2 phrase memory, morse decoder VFOA/B, SPLIT, calibrated S-meter. Support CAT (KENWOOD protocol) Control attenuator, LNA, 5 band BPF without decoder and 16 band with external decoder Firmware is opensource and available on github For more details visit to project homepage [http://dspview.com/viewtopic.php?t=277](http://dspview.com/viewtopic.php?t=277)
Design Drawing
schematic diagram
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ID Name Designator Footprint Quantity
1 CR2032-BS-2-1 B1 BAT-TH_BS-2-1 1
2 0.1u C1,C2,C5,C6,C9,C10,C11,C14 0805 8
3 0.1 C3,C64,C65 0805 3
4 100u C7,C17 CAP-D6.3XF2.5 2
5 470u C8 CAP-D6.3XF2.5 1
6 0.01 C12,C13 0805 2
7 0.1 C63 C0603 1
8 10u C66 0805 1
9 OLED 1.3" DISP1 SSH1106 1.3IN 128X64 I2C (HOLES) 1
10 I2C Ext H4 DIP-1X4P-2.54MM-M 1
11 Ctrl J1 HDR-M-2.54_2X8 1
12 VFO Out J2 HDR-M-2.54_2X2 1
13 Enable Ext Power P1 HDR-2X1/2.54 1
14 Power 6V..12V P8 HDR-2X1/2.54 1
15 4k7 R10,R11 0805 2
16 33k R15 0805 1
17 15k R16 0805 1
18 5k6 R17 0805 1
19 2k2 R18 0805 1
20 10k R20 0805 1
21 1k R30,R32 R0603 2
22 10k R33 R0603 1
23 Encoder SW1 BOURNS_PEC11R-4XXXF-SXXXX 1
24 Key 1 SW-2SWITCH,SW-3SWITCH,SW-4SWITCH,SW-5SWITCH SW4-6.2X6.2X5.0MM DIP BUTTON 4
25 Si5351A-A-GT U2 MSOP10 1
26 AMS1117-5.0 U6 SOT-223-3LEAD_TABPIN2 1
27 DS3231 U9 SO16W 1
28 AMS1117-3.3 U10 SOT-223-3LEAD_TABPIN2 1
29 CH340G U17 SOIC-16_150MIL 1
30 ATMEGA328_TQFP U18 TQFP32 1
31 MINI360BUCK U20 MINI360BUCK 1
32 micro USBFemale USB1 MICRO-USB-1 1
33 WIRE_CONNECTION_III_RevE_Date15jun2010 WC1 0805 1
34 XO 25MHz X1 7050 1
35 26MHZ X4 OSC 2520 4P/6P 1
36 25MHz XTAL1 HC-49U-PTH 1
37 16MHz Y1 3213 1
38 12MHz Y2 3213 1

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