2 layers149.9 × 100.3 mm
2 layers100.1 × 99.9 mm
Communicator 27mhz
cropinghigh/CBModem3CB Modem for license-free digital comms
- Size
- 100.1 × 99.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 230
- Nets
- 167
- Pads
- 641
- Tracks, vias
- 1,163, 114
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 5 Jun 2021
- Updated
- 25 Mar 2024
Overview
Communicator 27mhz is an open-source printed circuit board by cropinghigh, from the cropinghigh/CBModem repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 100.1 × 99.9 mm with 230 parts on 167 nets, routed with 1,163 tracks and 114 vias.
It is built around the ESP32-WROOM-32, LM324 and CH340G, with the 74ACT14PC, L7805 and LM1117-3.3 among its other parts. Its parts include 82 capacitors, 68 resistors, 21 inductors, 9 ICs and 6 diodes. It belongs with the ESP32 boards of this library.
Main components
9
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
LM324
SOP-14-1.5V~10V 0℃~+70℃ 24V 250nA 3V~20V 4 40mA 50nA 700uA 7mV 80dB SOP-14 Operational Amplifier ROHSHXY MOSFETOperational Amplifier
CH340G
SOP-16-40℃~+85℃ 2Mbps 3.3V、5V USB 2.0 USB to UART SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
74ACT14PC
DIP-14-40℃~+85℃ 10ns@5V,50pF 24mA 24mA 2V 2uA 4.5V~5.5V 6 74ACT 800mV Noise suppression function Schmitt trigger DIP-14 Inverters ROHSonsemiInverters
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
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 ROHShongjiachengUncategorised
MMBT2222A
SOT-23-55℃~+150℃ 1 NPN 100 100nA 1V 300MHz 300mW 40V 600mA 6V NPN Standalone SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
IRF9Z34N
TO-220-55℃~+175℃ 1 P-Channel 100mΩ@10V 140pF 19A 35nC@10V 4V 55V 620pF 68W P-Channel TO-220 MOSFETs ROHSInfineon TechnologiesMOSFETs
2SA1213
SOT-89-3L-55℃~+150℃ 1 PNP 100MHz 100nA 120 2A 500mV 500mW 50V 5V PNP SOT-89-3L Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
Parts
230| Qty | Value | Footprint | References |
|---|---|---|---|
| 28 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C4, C10, C14, C15, C16, C18, C20, C23, C24, C26, C27, C28, C29, C38, C39 +12 |
| 17 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R3, R11, R12, R13, R22, R23, R26, R27, R42, R43, R67, R68, R69, R70, R71 +1 |
| 16 | 10n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C25, C32, C33, C34, C35, C45, C46, C49, C50, C62, C63, C78, C79, C80, C81, C88 |
| 10 | MMBT2222A | Package_TO_SOT_SMD:SOT-23 | Q?, Q?, Q?, Q?, Q?, Q?, Q?, Q?, Q?, Q1 |
| 8 | 5k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R17, R34, R41, R47, R49, R50, R51 |
| 7 | 10uH | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L1, L2, L3, L4, L12, L19, L21 |
| 6 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5, R6, R7, R8, R15 |
| 6 | 3k3 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R28, R29, R45, R46, R60, R61 |
| 5 | 1n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C30, C31, C42, C44, C47 |
| 5 | 220p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C70, C71, C76, C82, C83 |
| 5 | 330p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C53, C60, C72, C74, C75 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C51, C52, C56, C57 |
| 4 | 20k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R?, R?, R30, R31 |
| 4 | 47u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C?, C7, C21, C36 |
| 4 | 5 1W | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R44, R48, R58, R59 |
| 4 | 5k6 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24, R25, R38, R40 |
| 3 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R39, R52, R53 |
| 3 | 4148 | Diode_SMD:D_SOD-123 | D8, D9, D10 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R37, R63 |
| 2 | 100p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C59, C66 |
| 2 | 10k | Potentiometer_THT:Potentiometer_Bourns_3296X_Horizontal | RV2, RV3 |
| 2 | 150p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C40, C86 |
| 2 | 220n | communicator_27mhz_custompcb:Soviet_inductor_core_vertical | L7, L10 |
| 2 | 22p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13, C17 |
| 2 | 22u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C?, C? |
| 2 | 25k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R65, R66 |
| 2 | 470p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C55, C64 |
| 2 | 470u | Capacitor_THT:CP_Radial_D8.0mm_P3.80mm | C12, C19 |
| 2 | 47n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C41, C48 |
| 2 | 47p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C73, C84 |
| 2 | 510 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19, R21 |
| 2 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R62 |
| 2 | 6k8 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18, R20 |
| 2 | 900 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R55, R56 |
| 2 | IRF9Z34N | Package_TO_SOT_THT:TO-220-3_Vertical | Q2, Q13 |
| 2 | KT315 | communicator_27mhz_custompcb:KT-13 | Q3, Q4 |
| 2 | LM324 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U3, U4 |
| 2 | M3 | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 2 | SA612 | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U10, U11 |
| 2 | ~40T on М2000НМ core | communicator_27mhz_custompcb:Ferrite_ring_10x6x5_vertical | L8, L15 |
| 1 | 0.15uH(6T,d6) | communicator_27mhz_custompcb:Inductor_10x8 | L5 |
| 1 | 0.225uH(6T,d6) | communicator_27mhz_custompcb:Inductor_10x8 | L14 |
| 1 | 0.5uH(13T,d5) | communicator_27mhz_custompcb:Inductor_15x8 | L9 |
| 1 | 10 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R32 |
| 1 | 100k | Potentiometer_THT:Potentiometer_Bourns_3296X_Horizontal | RV? |
| 1 | 10T, d=4mm | communicator_27mhz_custompcb:Inductor_15x8 | L18 |
| 1 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C11 |
| 1 | 12M | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 12V | LED_THT:LED_D3.0mm | D6 |
| 1 | 150 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R54 |
| 1 | 2.2u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 22u | Capacitor_THT:CP_Radial_D8.0mm_P3.80mm | C? |
| 1 | 2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
| 1 | 3.7-20uH | communicator_27mhz_custompcb:Soviet_inductor_core_vertical | L20 |
| 1 | 30p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C87 |
| 1 | 3225 25 MHz TCXO | Oscillator:Oscillator_SMD_EuroQuartz_XO32-4Pin_3.2x2.5mm_HandSoldering | X1 |
| 1 | 330 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R57 |
| 1 | 39p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C77 |
| 1 | 3V3 | LED_THT:LED_D3.0mm | D5 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R36 |
| 1 | 4k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R64 |
| 1 | 500 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R35 |
| 1 | 50k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 5V | LED_THT:LED_D3.0mm | D4 |
| 1 | 6.8uH | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | L6 |
| 1 | 6T on М2000НМ core | communicator_27mhz_custompcb:Ferrite_ring_10x6x5_vertical | L11 |
| 1 | 6T, d=5 | communicator_27mhz_custompcb:Inductor_10x8 | L16 |
| 1 | 6n8 | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C37 |
| 1 | 74ACT14 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U7 |
| 1 | 7T, d=4 | communicator_27mhz_custompcb:Inductor_8x8 | L17 |
| 1 | 820n | communicator_27mhz_custompcb:Soviet_inductor_core_vertical | L13 |
| 1 | ANT | Connector_Coaxial:SMA_Amphenol_901-143_Horizontal | J4 |
| 1 | C2078 | Package_TO_SOT_THT:TO-220-3_Vertical | Q14 |
| 1 | C2314 | Package_TO_SOT_THT:TO-126-3_Vertical | Q8 |
| 1 | CH340G | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U5 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U2 |
| 1 | EXT_12V | Connector_Phoenix_MC_HighVoltage:PhoenixContact_MC_1,5_2-G-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U6 |
| 1 | LM1117-3.3 | Package_TO_SOT_THT:TO-220-3_Vertical | U1 |
| 1 | Logo_Open_Hardware_Large | Symbol:OSHW-Logo2_7.3x6mm_SilkScreen | LOGO1 |
The 223 most common of 230 parts.
Questions
How big is the Communicator 27mhz PCB?
It measures 100.1 × 99.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Communicator 27mhz use?
230 parts, built around the ESP32-WROOM-32, LM324, CH340G and 74ACT14PC. 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 Communicator 27mhz KiCad files?
From the cropinghigh/CBModem repository on GitHub, at the commit this page was made from: the board is hardware/communicator_27mhz.kicad_pcb and its schematic hardware/communicator_27mhz.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Communicator 27mhz design in my own project?
Its repository publishes it under the GPL-3.0 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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