PennyLekas/Nixie-Clockv1 is broken and required some bodge wires to work. I have not updated the schematic and PCB to correct my mistakes. It also has some deficencies in the dimming circuit resulint in a quiet, but audible whine.
Nixie Clock is an open-source printed circuit board by PennyLekas, from the PennyLekas/Nixie-Clock repository on GitHub. It is a 2-layer board of 115 × 80 mm with 102 parts on 185 nets, routed with 61 tracks and 0 vias.
It is built around the ATMEGA2560-16AU, CH340C and L80-R, with the IP2721, MIC5205-3.3YM5 and DS3231SN#T&R among its other parts. Its parts include 26 capacitors, 22 resistors, 15 ICs, 5 connectors and 3 transistors. It belongs with the lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
v1 is broken and required some bodge wires to work. I have not updated the schematic and PCB to correct my mistakes. It also has some deficencies in the dimming circuit resulint in a quiet, but audible whine.
v2 is in progress and will fix many issues and make the clock easier to update. It wil be using an RP2040.
Features
The goal of this is to be a program once project so the end user will never need to plug it into a computer. But if they do, the RP2040 will make firmware updates easy
| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 0u1 | Capacitor_SMD:C_0603_1608Metric | C1, C3, C3, C4, C4, C5, C5, C6, C7, C9, C11, C21, C22 |
| 7 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R4, R12, R13, R14, R15, R17 |
| 5 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4, H5 |
| 4 | 100K | Resistor_SMD:R_0603_1608Metric | R9, R10, R11, R20 |
| 4 | 10K | Resistor_SMD:R_0805_2012Metric | R18, R19, R21, R22 |
| 4 | 5K1 | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8 |
| 4 | ИН-8 | Nixie:ИН-8 | N1, N2, N3, N4 |
| 4 | К155ИД1 | Package_DIP:DIP-16_W7.62mm | U11, U12, U13, U14 |
| 3 | 10u | Capacitor_SMD:C_0603_1608Metric | C2, C18, C23 |
| 3 | 1u | Capacitor_SMD:C_0603_1608Metric | C12, C17, C19 |
| 3 | 2u2 | Capacitor_SMD:C_0603_1608Metric | C8, C10, C14 |
| 2 | 470p | Capacitor_SMD:C_0603_1608Metric | C13, C20 |
| 2 | Green | LED_SMD:LED_0603_1608Metric | D1, D2 |
| 2 | LM340MP-5.0_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3, U4 |
| 2 | MIC5205-3.3YM5 | Package_TO_SOT_SMD:SOT-23-5 | U5, U8 |
| 1 | +3V3 | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP4 |
| 1 | +5V | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP2 |
| 1 | +5VA | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP3 |
| 1 | 100u | Capacitor_SMD:C_0805_2012Metric | C15 |
| 1 | 16MHz | Crystal:Resonator_SMD_Murata_CSTxExxV-3Pin_3.0x1.1mm | Y1 |
| 1 | 170V | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP6 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 4u7 | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C16 |
| 1 | 5k1 | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | ANODE | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP5 |
| 1 | ATmega2560-16A | Package_QFP:TQFP-100_14x14mm_P0.5mm | U1 |
| 1 | BATTERY | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP14 |
| 1 | Battery_Cell | Battery:BatteryHolder_LINX_BAT-HLD-012-SMT | BT1 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | CSD18543Q3A | Package_SON:VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q1 |
| 1 | Colon | Connector_PinSocket_2.54mm:PinSocket_2x02_P2.54mm_Vertical | J5 |
| 1 | DIM | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP9 |
| 1 | DS3231SN#T&R | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U9 |
| 1 | GM5539 | OptoDevice:R_LDR_5.1x4.3mm_P3.4mm_Vertical | R3 |
| 1 | GPS_CTRL | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP11 |
| 1 | GPS_PWR | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP10 |
| 1 | ICSP | Connector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_Vertical | J2 |
| 1 | IP2721 | Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm_EP3x3mm_ThermalVias | U7 |
| 1 | L80-R | RF_GPS:Quectel_L80-R | U10 |
| 1 | LIGHT | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP1 |
| 1 | NCH8200HV | Nixie:NCH8200HV | U6 |
| 1 | PZTA42 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | Q3 |
| 1 | PZTA92 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | Q2 |
| 1 | RX | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP12 |
| 1 | Reset | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | SCL | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP15 |
| 1 | SDA | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP16 |
| 1 | Serial | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J3 |
| 1 | Settings | Button_Switch_THT:SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW1 |
| 1 | TX | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP13 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U15 |
| 1 | USB_C_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J4 |
| 1 | VSNK | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP8 |
| 1 | VUSB | TestPoint:TestPoint_THTPad_D2.0mm_Drill0.9mm | TP7 |
| 1 | Voltage Select | Jumper:SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
It measures 115 × 80 mm and has 2 copper layers, 1.6 mm thick.
102 parts, built around the ATMEGA2560-16AU, CH340C, L80-R and IP2721. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the PennyLekas/Nixie-Clock repository on GitHub, at the commit this page was made from: the board is Hardware/v1 - MEGA2560/KiCad/Nixie Clock.kicad_pcb and its schematic Hardware/v1 - MEGA2560/KiCad/Nixie Clock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask PennyLekas before reusing the design.
PennyLekas/Nixie-Clock
v1 is broken and required some bodge wires to work. I have not updated the schematic and PCB to correct my mistakes. It also has some deficencies in the dimming circuit resulint in a quiet, but audible whine.
PennyLekas/Nixie-Clock
v1 is broken and required some bodge wires to work. I have not updated the schematic and PCB to correct my mistakes. It also has some deficencies in the dimming circuit resulint in a quiet, but audible whine.
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