4 layers54.5 × 80 mm
2 layers50 × 40.9 mm
GR ATTiny LFO
GadgetReboot/ATTiny_LFO3Dual low frequency oscillators using ATTiny and MCP4725 DACs
- Size
- 50 × 40.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 27
- Pads
- 112
- Tracks, vias
- 302, 82
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 May 2025
- Updated
- 30 May 2025
Overview
GR ATTiny LFO is an open-source printed circuit board by GadgetReboot, from the GadgetReboot/ATTiny_LFO repository on GitHub. It is a 2-layer board of 50 × 40.9 mm with 36 parts on 27 nets, routed with 302 tracks and 82 vias.
It is built around the ATTINY1604-SSF, TLC272CD and AMS1117-5.0. Its parts include 14 resistors, 6 capacitors, 5 ICs, 5 connectors and 3 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY1604-SSF
SOIC-14-40℃~+125℃ 10bit 12 16KB 16MHz 1KB 2.7V~5.5V 256Byte 8 Bit AVR Built-in FLASH SOIC-14 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TLC272CD
SOIC-80.7pA 0℃~+70℃ 1.8uV/℃ 10mV 2 2.2MHz 25nV/√Hz@1kHz 3.6mA 300pA 30mA 3V~16V 5.3V/us 80dB ESD protection Rail-to-rail input SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
AMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdATTiny_LFO
Dual low frequency oscillators using ATTiny and MCP4725 DACs
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R4, R5, R10, R11, R12 |
| 3 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C3, C6 |
| 2 | 100r | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R9 |
| 2 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R7, R8 |
| 2 | 10K | _Pot:Potentiometer_Bourns_PTV09A-1 | R13, R14 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4, C5 |
| 2 | 380r | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2, R6 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1, J3 |
| 2 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2, J4 |
| 2 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2 |
| 2 | MCP4725 | Package_TO_SOT_SMD:SOT-23-6 | U2, U3 |
| 2 | SW_Push | _Pot:SW_SPST_60x35 | SW1, SW2 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 1x2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | AMS1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | ATtiny1604-SS | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | LOGO | _Custom_Footprints:pcb way logo | G*** |
| 1 | Power | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | TLC272 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
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Questions
How big is the GR ATTiny LFO PCB?
It measures 50 × 40.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the GR ATTiny LFO use?
36 parts, built around the ATTINY1604-SSF, TLC272CD and AMS1117-5.0. 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 GR ATTiny LFO KiCad files?
From the GadgetReboot/ATTiny_LFO repository on GitHub, at the commit this page was made from: the board is KiCad/GR_ATTiny_LFO.kicad_pcb and its schematic KiCad/GR_ATTiny_LFO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the GR ATTiny LFO design in my own project?
Its repository states no licence, so its author keeps all rights: ask GadgetReboot before reusing the design.