2 layers59.3 × 58 mm
2 layers99.1 × 49.5 mm
Wdt rng nrf
alexcustos/wrn-project1WRN is 3-in-1 device for RS232 serial port was designed to solve some standard problems of a home server.
- Size
- 99.1 × 49.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 60
- Pads
- 165
- Tracks, vias
- 421, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 3 May 2016
- Updated
- 25 May 2016
Overview
Wdt rng nrf is an open-source printed circuit board by alexcustos, from the alexcustos/wrn-project repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 99.1 × 49.5 mm with 49 parts on 60 nets, routed with 421 tracks and 0 vias.
It is built around the ATMEGA328P-PU, ADM202EANZ and NRF24L01P-R, with the LM1117T-3.3 among its other parts. Its parts include 12 capacitors, 12 resistors, 6 connectors, 4 ICs and 4 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATMEGA328P-PU
DIP-28-300mil-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH DIP-28-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
ADM202EANZ
PDIP-16-40℃~+85℃ 2 2 230Kbps 5V 6mA Transceiver Yes ±15kV PDIP-16 RS232 ICs ROHSAnalog DevicesRS232 ICs
NRF24L01P-R
QFN-20-EP(4x4)-40℃~+85℃ -82dBm 0dBm 1.9V~3.6V 11.3mA 13.5mA 2.4GHz 2.4GHz~2.525GHz 2Mbps ISM Power-on reset function、Supports RSSI function、CRC check function、Automatic response function、Automatic retransmission function SPI transceiver QFN-20-EP(4x4) RF Transceiver ICs ROHSNordic SemiconRF Transceiver ICs
LM1117T-3.3
TO-220-3L-40℃~+125℃@(Tj) 0.003%Vout 1 1.25V@(1A) 10mA 15V 1A 3.3V 75dB@(120Hz) Fixed Over Current Protection、Thermal shutdown Positive TO-220-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHGSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdWRN Project
WRN is 3-in-1 device for RS232 serial port was designed to solve some standard problems of a home server.
The board based on the ATmega328P and consist of:
- The hardware watchdog timer
- True random number generator (based on avalanche noise)
- Low power 2.4GHz transceiver (nRF24L01+)
The project consist of the following components:
- The schematic and the PCB (KiCAD project)
- The firmware (AtmelStudio project)
- Linux daemon, watchdog driver and the installation for the Gentoo (Makefile)
The project depends on:
Here's an article in russian with more details:
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1μF | Capacitors_ThroughHole:C_Disc_D7.5_P5 | C5, C6, C7, C8, C9, C10, C12 |
| 3 | 1k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R3, R4, R12 |
| 3 | 2N3904 | wdt_rng_nrf:TO-92_2N3904 | Q1, Q2, Q3 |
| 2 | 10k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R2, R9 |
| 2 | 10μF(tant) | Capacitors_ThroughHole:C_Disc_D7.5_P5 | C1, C2 |
| 2 | 22pF | Capacitors_ThroughHole:C_Disc_D3_P2.5 | C3, C4 |
| 1 | 10μF | Capacitors_ThroughHole:C_Radial_D5_L6_P2.5 | C11 |
| 1 | 180Ω | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R1 |
| 1 | 1M | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R6 |
| 1 | 20MHz | Crystals:Crystal_HC49-U_Vertical | Y1 |
| 1 | 2N7000 | wdt_rng_nrf:TO-92_2N7000 | Q4 |
| 1 | 4.7k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R5 |
| 1 | 470Ω | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R11 |
| 1 | 6.8k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R10 |
| 1 | 680k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R8 |
| 1 | 820k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R7 |
| 1 | ADM202EANZ | Housings_DIP:DIP-16_W7.62mm | U3 |
| 1 | ATMEGA328P-PU | Housings_DIP:DIP-28_W7.62mm | IC1 |
| 1 | DTR | Pin_Headers:Pin_Header_Straight_1x02 | JP1 |
| 1 | FDD_PRW | Pin_Headers:Pin_Header_Angled_1x04 | P3 |
| 1 | FTDI | Pin_Headers:Pin_Header_Straight_1x05 | P7 |
| 1 | ICSP | Pin_Headers:Pin_Header_Straight_2x03 | P1 |
| 1 | LED | LEDs:LED-5MM | D1 |
| 1 | LM1117T-3.3 | TO_SOT_Packages_THT:TO-220_Neutral123_Horizontal | U1 |
| 1 | PC817 | Housings_DIP:DIP-4_W7.62mm | U2 |
| 1 | RESET | wdt_rng_nrf:Push_E-Switch_TC-0102 | PB1 |
| 1 | RS232 | Pin_Headers:Pin_Header_Straight_2x05 | P2 |
| 1 | SWITCH | Pin_Headers:Pin_Header_Angled_1x04 | P5 |
| 1 | nRF24L01+ | Pin_Headers:Pin_Header_Angled_1x08 | P4 |
The 42 most common of 49 parts.
Questions
How big is the Wdt rng nrf PCB?
It measures 99.1 × 49.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Wdt rng nrf use?
49 parts, built around the ATMEGA328P-PU, ADM202EANZ, NRF24L01P-R and LM1117T-3.3. 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 Wdt rng nrf KiCad files?
From the alexcustos/wrn-project repository on GitHub, at the commit this page was made from: the board is pcb/wdt_rng_nrf.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Wdt rng nrf design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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