2 layers99.1 × 34.3 mm
2 layers100.1 × 78.2 mm
ENMT LFR
r3dpath/ENMT-LFR- Size
- 100.1 × 78.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 56
- Nets
- 50
- Pads
- 192
- Tracks, vias
- 259, 15
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 14 Sep 2023
- Updated
- 22 Oct 2023
Overview
ENMT LFR is an open-source printed circuit board by r3dpath, from the r3dpath/ENMT-LFR repository on GitHub. It is a 2-layer board of 100.1 × 78.2 mm with 56 parts on 50 nets, routed with 259 tracks and 15 vias.
It is built around the ATMEGA4808-AF and MCP1700-3302E/TO. Its parts include 15 resistors, 10 capacitors, 9 connectors, 6 diodes and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA4808-AF
TQFP-32(7x7)-40℃~+125℃ 1.8V~5.5V 10bit 20MHz 256Byte 27 48KB 6KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Built-in general-purpose timer、Hardware CRC、Window watchdog (WWDG) TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MCP1700-3302E/TO
TO-92-3-40℃~+125℃@(Tj) 1 250mA 3.3V 350mV@(250mA) 44dB@(1kHz) 4uA 6V Fixed Over Temperature Protection、Short Circuit Protection Positive TO-92-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdENMT-LFR
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0R | Resistor_SMD:R_0805_2012Metric | R2, R12, R13, R14, R15 |
| 4 | 100n | Capacitor_SMD:C_1206_3216Metric | C3, C4, C5, C6 |
| 4 | 470R | Resistor_SMD:R_0805_2012Metric | R1, R5, R6, R7 |
| 4 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R9, R11 |
| 2 | 10000 | Resistor_SMD:R_0805_2012Metric | R8, R10 |
| 2 | 10u | Capacitor_SMD:C_1206_3216Metric | C7, C8 |
| 2 | 1u | Capacitor_SMD:C_1206_3216Metric | C1, C2 |
| 2 | 3V | Battery:BatteryHolder_Keystone_2462_2xAA | BT1, BT2 |
| 2 | BSR802 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | C | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C9, C10 |
| 2 | LOGO | LOGO | , |
| 2 | SB130 | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D5, D6 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP3V3, TP6V1 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 4.7k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | ATmega4808-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U2 |
| 1 | Backup connector bit | Connector_PinHeader_2.00mm:PinHeader_1x05_P2.00mm_Vertical | J9 |
| 1 | Buzzer | Custom:PKM13EPYH4000 | BZ1 |
| 1 | IR Connector | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J4 |
| 1 | L_Motor | Connector_JST:JST_PH_S3B-PH-K_1x03_P2.00mm_Horizontal | J6 |
| 1 | L_Motor_Backup | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | MCP1700-3302E/TO | Package_TO_SOT_THT:TO-92_Inline | U1 |
| 1 | Prog Connector | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2 |
| 1 | R Motor | Connector_JST:JST_PH_S3B-PH-K_1x03_P2.00mm_Horizontal | J5 |
| 1 | RESET_SW | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | R_Motor_Backup | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | Switch | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
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Questions
How big is the ENMT LFR PCB?
It measures 100.1 × 78.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ENMT LFR use?
56 parts, built around the ATMEGA4808-AF and MCP1700-3302E/TO. 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 ENMT LFR KiCad files?
From the r3dpath/ENMT-LFR repository on GitHub, at the commit this page was made from: the board is PCB/MainBoard/MainBoard.kicad_pcb and its schematic PCB/MainBoard/MainBoard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ENMT LFR design in my own project?
Its repository states no licence, so its author keeps all rights: ask r3dpath before reusing the design.