2 layers84.3 × 58.4 mm
EnocderDriver
NikodemBartnik/Small-Projects
All of smaller projects (Arduino, PCBs, electronics, code)
35 parts55
2 layers36 × 36 mm
Transmitter
BenjiHansell/Radio-ControllerA 3D printed radio controller with a custom PCB and firmware.
- Size
- 36 × 36 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 40
- Nets
- 32
- Pads
- 139
- Tracks, vias
- 430, 30
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 28 Sep 2017
- Updated
- 28 Sep 2017
Overview
Transmitter is an open-source printed circuit board by BenjiHansell, from the BenjiHansell/Radio-Controller repository on GitHub. It is a 2-layer board of 36 × 36 mm with 40 parts on 32 nets, routed with 430 tracks and 30 vias.
It is built around the ATMEGA328P-AU, LM1117-3.3 and LM1117-5.0. Its parts include 11 connectors, 9 capacitors, 5 resistors, 1 switch and 1 crystal. It belongs with the radio and wireless boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328P-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LM1117-3.3
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 3.3V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorisedLM1117-5.0
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 5V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
README
PCB/README.mdPCB
The PCB is designed using KiCAD. The schematic is based around that of the Arduino Pro Mini, with an ATmega328P clocked at 16 MHz on a 5V supply. There are pin headers for connecting an SPI NRF24L01+ radio module (which has a dedicated 3.3V supply), an I2C LCD display, some LEDs, switches, analog sticks and a UART programmer. There is a potential divider for reading the battery voltage.
Order boards
I ordered my boards at OSH Park https://oshpark.com/shared_projects/BLpBqENQ
Room for improvement
This PCB is the first iteration, with a few imperfections. If I order more copies I will make the following minor modifications:
- A rectangular (rather than square) form factor would allow for more comfortable vertical mounting inside the radio controller
- The rotary encoder needs its own header with power, ground and 3 digital inputs
- PD0, PD1 and PD2 could be broken out for use with additional aux switches
Long term improvements
The following major features could also be added later:
- A more powerful (yet inexpensive) MCU, such as the STM32F103C8T6
- 1S Li-Ion recharge and boost circuitry (via a USB-B or USB-C port)
- On-board programming (via the same USB port)
Parts
40| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | CONN_01X03 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J1, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10 |
| 6 | C | Capacitors_SMD:C_0805_HandSoldering | C1, C2, C3, C4, C5, C6 |
| 5 | R | Resistors_SMD:R_0805_HandSoldering | R1, R2, R3, R4, R5 |
| 3 | CP | Capacitors_SMD:C_0805_HandSoldering | C7, C8, C9 |
| 2 | CONN_01X04 | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | I2C, P12 |
| 1 | ATMEGA328P-A | Housings_QFP:TQFP-32_7x7mm_Pitch0.8mm | MCU |
| 1 | AVR-ISP-6 | Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm | ISP |
| 1 | CONN_01X06 | Pin_Headers:Pin_Header_Straight_1x06_Pitch2.54mm | FTDI |
| 1 | CONN_02X04 | Pin_Headers:Pin_Header_Straight_2x04_Pitch2.54mm | NRF |
| 1 | Crystal | Crystals:Crystal_HC49-U_Vertical | Y1 |
| 1 | Jumper_NO_Small | Resistors_SMD:R_0805_HandSoldering | JP1 |
| 1 | LM1117-3.3 | TO_SOT_Packages_SMD:SOT-223-3Lead_TabPin2 | 3V3 |
| 1 | LM1117-5.0 | TO_SOT_Packages_SMD:SOT-223-3Lead_TabPin2 | 5V |
| 1 | SW_PUSH | Buttons_Switches_SMD:SW_SPST_EVQPE1 | SW1 |
The 36 most common of 40 parts.
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Questions
How big is the Transmitter PCB?
It measures 36 × 36 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Transmitter use?
40 parts, built around the ATMEGA328P-AU, LM1117-3.3 and LM1117-5.0. 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 Transmitter KiCad files?
From the BenjiHansell/Radio-Controller repository on GitHub, at the commit this page was made from: the board is PCB/Transmitter.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Transmitter design in my own project?
Its repository states no licence, so its author keeps all rights: ask BenjiHansell before reusing the design.