4 layers168 × 90 mm
2 layers87 × 88 mm
Telegraph
Kreyl/Telegraph- Size
- 87 × 88 mm
- Copper layers
- 2
- Thickness
- 1.5 mm
- Parts
- 187
- Nets
- 119
- Pads
- 590
- Tracks, vias
- 4,880, 354
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 15 Jul 2015
- Updated
- 5 Aug 2015
Overview
Telegraph is an open-source printed circuit board by Kreyl, from the Kreyl/Telegraph repository on GitHub. It is a 2-layer board of 87 × 88 mm with 187 parts on 119 nets, routed with 4,880 tracks and 354 vias.
It is built around the BC848, SMBJ15CA and SS14, with the LP2951D and MMBT2222 among its other parts. Its parts include 53 resistors, 48 capacitors, 24 diodes, 8 transistors and 5 switches. It belongs with the STM32 boards of this library.
Main components
5
BC848
SOT-23SOT-23 Bipolar (BJT) ROHSTDDBipolar (BJT)
SMBJ15CA
DO-214AA(SMB)-65℃~+150℃ 15V 18.5V 1uA 24.4V 24.6A@10/1000us 600W@10/1000us Bidirectional TVS DO-214AA(SMB) ESD and Surge Protection (TVS/ESD) ROHSMDDESD And Surge Protection (TVS/ESD)
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
LP2951D
SOIC-8-40℃~+125℃@(Tj) 1 1.235V~30V、5V 100mA 30V 430uV 450mV@(100mA) 75uA Fixed、Adjustable Over Current Protection、Over Temperature Protection、Enable Positive SOIC-8 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsMMBT2222
SOT-231 NPN 1uA 300mV 300mW 400 40V 600mA 6V NPN SOT-23 Bipolar (BJT) ROHSYONGYUTAIBipolar (BJT)
Parts
187| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | TESTPOINT | PCB:TESTPOINT_1MM | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP14 |
| 13 | 0.1u | Capacitors:CAP_0603 | C8, C9, C11, C12, C14, C15, C16, C20, C26, C27, C28, C29, C51 |
| 11 | 1k | Resistors:RES_0603 | R9, R10, R13, R14, R18, R19, R50, R53, R54, R66, R67 |
| 11 | LED | LEDs:LED_Through-Hole-3mm | D3, D4, D5, D6, D7, D9, D10, D15, D16, D17, D27 |
| 10 | 10k | Resistors:RES_0603 | R22, R23, R26, R28, R34, R35, R42, R43, R55, R73 |
| 9 | HOLE_METALLED | PCB:Hole3_5_out6mm | HOLE1, HOLE2, HOLE3, HOLE4, HOLE5, HOLE6, HOLE8, HOLE9, HOLE10 |
| 8 | 0.1u/50v | Capacitors:CAP_0603 | C40, C41, C42, C43, C44, C45, C46, C47 |
| 7 | 200 | Resistors:RES_0603 | R3, R4, R7, R47, R48, R49, R72 |
| 6 | BC848 | SOT:SOT23-3 | Q1, Q2, Q6, Q7, Q10, Q11 |
| 5 | 100p | Capacitors:CAP_0603 | C22, C23, C24, C25, C30 |
| 5 | 39K | Resistors:RES_0603 | R60, R61, R62, R63, R64 |
| 5 | CONN_2 | Connectors:PLS-2 | XL10, XL11, XL12, XL13, XL14 |
| 5 | LED | LEDs:LED_0603 | D18, D19, D20, D21, D22 |
| 4 | 10n | Capacitors:CAP_0603 | C1, C2, C3, C4 |
| 4 | 10u | Capacitors:CAP_0805 | C7, C21, C32, C34 |
| 4 | 1N4148 | Diodes:SOD80C | D23, D24, D25, D26 |
| 4 | 4k7 | Resistors:RES_0603 | R1, R6, R69, R71 |
| 4 | 510R | Resistors:RES_0603 | R56, R57, R58, R59 |
| 3 | 20k | Resistors:RES_0603 | R38, R39, R51 |
| 2 | 100u/63v | Capacitors:CAP_10xxR | C48, C49 |
| 2 | 10n/50v | Capacitors:CAP_0603 | C37, C39 |
| 2 | 150 | Resistors:RES_0603 | R27, R29 |
| 2 | 2.2u | Capacitors:CAP_0603 | VCap1, VCap2 |
| 2 | 20pF | Capacitors:CAP_0603 | C10, C13 |
| 2 | 220n/16v | Capacitors:CAP_0603 | C36, C38 |
| 2 | 33k | Resistors:RES_0603 | R68, R70 |
| 2 | 4u7/63v | Capacitors:CAP_0805 | C33, C35 |
| 2 | CONN_2 | Connectors:SPRING_TERM_XY124V_A_2 | XL1, XL2 |
| 2 | CONN_2 | Connectors:TermiBlockHeader_508_x2_R | XL9, XL16 |
| 2 | CONN_4 | Connectors:TermiBlockHeader_508_x4_R | XL17, XL18 |
| 2 | L6470 | SO_DIL_TSSOP:HTSSOP28 | U1, U2 |
| 2 | SMBJ15CA | Diodes:SMB_DO214AA | D1, D2 |
| 2 | SS14 | Diodes:SMA_DO214AC | D13, D14 |
| 2 | SWITCH_2x | BtnsSwitches:BTN_PSM6 | SW4, SW5 |
| 1 | 1000pF | Capacitors:CAP_0603 | C18 |
| 1 | 1000u | Capacitors:CAP_10xxR | C17 |
| 1 | 100k | Resistors:RES_0603 | R75 |
| 1 | 12 MHz | Quartz:0503x4-4 | XTAL1 |
| 1 | 12k | Resistors:RES_0603 | R52 |
| 1 | 1M | Resistors:RES_0603 | R17 |
| 1 | 1u | Capacitors:CAP_0603 | C19 |
| 1 | 200R | Resistors:RES_0603 | R46 |
| 1 | 330k | Resistors:RES_0603 | R74 |
| 1 | 4u7 | Capacitors:CAP_0805 | C50 |
| 1 | BARREL_SOCKET | Connectors:Barrel | XL8 |
| 1 | BLM | Inductors:IND_0402 | L1 |
| 1 | BUTTON | BtnsSwitches:BTN_6x6 | SW3 |
| 1 | BUZZER | Installation:BUZZER_HC0903 | BZ1 |
| 1 | CONN_3 | Connectors:PLS-3 | XL5 |
| 1 | CONN_5 | Connectors:PLS-5 | XL15 |
| 1 | DIPx4 | BtnsSwitches:DIP_SMD_X4 | SW1 |
| 1 | DVIUC6-4SC6 | SOT:SOT23-6 | Q5 |
| 1 | IPS6041 | SO_DIL_TSSOP:SO8HEATSINK | DA2 |
| 1 | LP2951 | SO_DIL_TSSOP:SO8 | DA1 |
| 1 | MMBT2222 | SOT:SOT23-3 | Q14 |
| 1 | STM32F405RX-64 | LQFP_TQFP:LQFP64 | DD1 |
| 1 | ST_SWD | Connectors:PLS-4 | XL6 |
| 1 | SWITCH_H | BtnsSwitches:SW_SS9 | SW2 |
| 1 | USB_MICRO_B | Connectors:USBmicro_MOLEX_WM17142 | XL7 |
Questions
How big is the Telegraph PCB?
It measures 87 × 88 mm and has 2 copper layers, 1.5 mm thick.
What parts does the Telegraph use?
187 parts, built around the BC848, SMBJ15CA, SS14 and LP2951D. 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 Telegraph KiCad files?
From the Kreyl/Telegraph repository on GitHub, at the commit this page was made from: the board is pcb/Telegraph.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Telegraph design in my own project?
Its repository states no licence, so its author keeps all rights: ask Kreyl before reusing the design.
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