HardLabs

Radioclock

erikvanzijst·radioclock·kicad/atomic_clock.kicad_pcb

Radioclock PCB layout, top view — open source Microchip SAM board by erikvanzijst

About the Radioclock PCB

Radioclock is an open source Microchip SAM PCB design by erikvanzijst, published on GitHub under the MIT license. It is a 2-layer board measuring 282.7 × 19 mm, with 78 components from 33 distinct parts.

Its main chip is the ATSAMDA1E16B-A, from the Microchip SAM family. Other key parts include the D198K, MAX7221xWG, NCP1117LPST33T3G, mems_osc_st1630 and DHT20. By type, the board carries 25 ICs, 16 connectors, 13 resistors, 11 capacitors, 7 diodes and 2 transistors.

It belongs with the rf & radio designs in this gallery.

From the project

A radio controlled digital wall clock

This project contains a custom designed wall clock that syncs to the DCF77 atomic time broadcast radio signal from Germany to ensure accuracy at all times. There are no buttons to set the time manually.

Radioclock, from the project README
From the project README

Main components on the Radioclock

D198KMAX7221xWGATSAMDA1E16B-ANCP1117LPST33T3Gmems_osc_st1630DHT20DCF77MCP73831-2-OTTXB0101

Radioclock bill of materials (BOM)

78 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
16
D198K
U1, U2, U3, U4, U6, U7, U8, U9 +8
2
MAX7221xWG
U5, U16
1
ATSAMDA1E16B-A
U10
1
NCP1117LPST33T3G
U20
1
mems_osc_st1630
U21
1
DHT20
U22
1
DCF77
U23
1
MCP73831-2-OT
U24
1
TXB0101
U25
2
Q_Dual_PMOS
Q1, Q2
10
Conn_02x05_Top_Bottom
J1, J2, J3, J4, J6, J7, J8, J9 +2
1
USB_B_Micro 1051330001
J5
1
USB_B_Micro 10118194-0001LF
J12
1
ARM_JTAG_SWD_10 3220-10-0100-00
J13
1
Conn_01x02_Male
J14
1
Conn_01x03_Female
J15
1
Conn_01x03_Male
J16
1
Varta CP1654 A3
BT1
1
50K
RV1
2
SW_Push
SW1, SW2
Show 13 more
QtyPartRefs
4
LED LTL-1224A
D1, D2, D3, D4
2
LED HSMS-C150
D7, D10
1
Schottky NSR05T40
D8
5
100nF 885012207016
C1, C4, C6, C7, C8
3
10uF CL21A106KPFNNNF
C2, C3, C11
1
1uF 885012207051
C5
2
4.7uF CL21A475KPFNNNE
C9, C10
1
1K
R2
8
10K
R3, R7, R10, R11, R12, R13, R14, R15
1
1M
R5
1
LDR NSL-19M51
R6
1
470R
R8
1
220R
R16

Radioclock design files

The KiCad project lives in the erikvanzijst/radioclock repository on GitHub; these links point at the commit this page was built from.

Radioclock: common questions

What microcontroller does the Radioclock use?

The Radioclock is built around the ATSAMDA1E16B-A, from the Microchip SAM family.

How big is the Radioclock PCB?

The Radioclock measures 282.7 × 19 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Radioclock?

78 components, from 33 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Radioclock design files?

From the erikvanzijst/radioclock repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Radioclock design in my own project?

Yes, under the terms of its MIT license, which erikvanzijst chose for the repository.

Can I test firmware for the Radioclock without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Microchip SAM firmware against it before you order a PCB.

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