4 layers203.5 × 90 mm
BDCMotorController
nunosousa/TelescopeMirrorTester
This is an application intended to provide useful tools to perform Foucault or Wire testing on reflective telescope mirrors
323 partsMIT
4 layers50 × 25 mm
RotationEncoder
nunosousa/TelescopeMirrorTesterThis is an application intended to provide useful tools to perform Foucault or Wire testing on reflective telescope mirrors
- Size
- 50 × 25 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 49
- Nets
- 45
- Pads
- 158
- Tracks, vias
- 308, 78
- Pours
- 97
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 Jan 2020
- Updated
- 19 Oct 2026
Overview
RotationEncoder is an open-source printed circuit board by nunosousa, from the nunosousa/TelescopeMirrorTester repository on GitHub, published under the MIT licence. It is a 4-layer board of 50 × 25 mm with 49 parts on 45 nets, routed with 308 tracks and 78 vias.
It is built around the ATMEGA328PB-AU, ST485EBDR and AS5600-ASOT, with the TLV75801PDBVR-MS, C0805F104K5RACAUTO and LQM21FN100M80L among its other parts. Its parts include 18 capacitors, 11 resistors, 5 ICs, 5 inductors and 3 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
12
ATMEGA328PB-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 27 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Touch function TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
ST485EBDR
SOIC-8-40℃~+85℃ 1 1 300uA 4.75V~5.25V 5Mbps Transceiver ±15kV SOIC-8 RS-485 / RS-422 ICs ROHSSTMicroelectronicsRS-485 / RS-422 ICsAS5600-ASOT
SOIC-8-40℃~+125℃ 0°~360° 1.75mm 3.3V、5V 3.9mm 4.9mm 6.5mA I2C Magnetic rotary position sensor No SOIC-8 Position Sensors ROHSAdvanced Monolithic SystemsPosition Sensors
TLV75801PDBVR-MS
SOT-23-5SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIUncategorised
C0805F104K5RACAUTO
0805100nF 50V X7R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSKEMETMultilayer Ceramic Capacitors MLCC - SMD/SMT
LQM21FN100M80L
0805100mA 100mA 10uH 15MHz 390mΩ Multilayer inductor ±20% 0805 Inductors (SMD) ROHSMurataInductors (SMD)GRM21BR61E106MA73L
080510uF 25V X5R ±20% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMT0805CG130J500NT
080513pF 50V C0G ±5% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
RC0805JR-074K7L
UncategorisedUnknown maker
RT0805BRD07100KL
0805-55℃~+155℃ 100kΩ 125mW 150V Thin Film Resistor ±0.1% ±25ppm/℃ 0805 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface Mount
X1E0000210119
SMD3225-4P-40℃~+85℃ 12pF 16MHz 60Ω Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSSeiko EpsonCrystalsCL21B105KAFNNNE
08051uF 25V X7R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
README
README.mdTelescopeMirrorTester
tbd
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100nC | Capacitor_SMD:C_0805_2012Metric | C1, C3, C4, C5, C8, C11, C13, C14, C18 |
| 5 | 10kR | Resistor_SMD:R_0805_2012Metric | R4, R7, R8, R10, R11 |
| 4 | 10uL | Inductor_SMD:L_0805_2012Metric | L1, L2, L4, L5 |
| 3 | 10uC | Capacitor_SMD:C_0805_2012Metric | C10, C12, C16 |
| 3 | 13pC | Capacitor_SMD:C_0805_2012Metric | C6, C9, C15 |
| 2 | 4k7R | Resistor_SMD:R_0805_2012Metric | R2, R3 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 1 | 100kR | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1kR | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | 1uC | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 4148 | Diode_SMD:D_SOD-123 | D2 |
| 1 | 47uC | Capacitor_SMD:C_1210_3225Metric | C17 |
| 1 | 4n7C | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 4u7L | Inductor_SMD:L_1008_2520Metric | L3 |
| 1 | 61k9R | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | 80k6R | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | AS5600 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | ATmega328PB-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U3 |
| 1 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | CMS30I30A | Diode_SMD:D_SOD-128 | D3 |
| 1 | ICSP | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | RS485 | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | J1 |
| 1 | ST485E | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | TLV75801PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | TPS561208DDCR | Package_TO_SOT_SMD:SOT-23-6 | U4 |
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Questions
How big is the RotationEncoder PCB?
It measures 50 × 25 mm and has 4 copper layers, 1.61 mm thick.
What parts does the RotationEncoder use?
49 parts, built around the ATMEGA328PB-AU, ST485EBDR, AS5600-ASOT and TLV75801PDBVR-MS. 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.
Where can I download the RotationEncoder KiCad files?
From the nunosousa/TelescopeMirrorTester repository on GitHub, at the commit this page was made from: the board is ECAD/RotationEncoder/RotationEncoder.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the RotationEncoder design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).