
Wandfernsprecher
hanebefl/wandfernsprecher-hw
GSM conversion for a old German Wandfernsprecher telephone

Iot pcb is an open-source printed circuit board by saftamed, from the saftamed/iot-pcb repository on GitHub. It is a 2-layer board of 105 × 123 mm with 86 parts on 84 nets, routed with 420 tracks and 0 vias.
It is built around the ATMEGA328P-PU and SIM800L. Its parts include 26 connectors, 18 resistors, 9 ICs, 8 capacitors and 8 diodes. It belongs with the home automation and IoT boards and the AVR (ATmega, ATtiny) boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | R_Small | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R2, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R17, R18 |
| 6 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3, Q4, Q5, Q6 |
| 6 | DIODE | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D1, D3, D4, D5, D6, D7 |
| 6 | PC817 | Package_DIP:DIP-4_W7.62mm | U1, U2, U3, U6, U7, U8 |
| 6 | SRD | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K1, K2, K3, K4, K5, K6 |
| 6 | Screw | TerminalBlock:TerminalBlock_bornier-3_P5.08mm | J3, J7, J8, J9, J10, J11 |
| 5 | A | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J12, J15, J16, J24, J25 |
| 4 | 100nf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C2, C3, C4, C6 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5_Pad_Via | H1, H2, H3, H4 |
| 3 | Micro | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J13, J19, J20 |
| 3 | i2c | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J18, J23, Je |
| 3 | pwm | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4, J5, J6 |
| 2 | 10K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R3, R4 |
| 2 | 22pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C7, C8 |
| 1 | 10uf | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C5 |
| 1 | 1N4001 | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D2 |
| 1 | 200uf | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | 20K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R5 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R16 |
| 1 | ATmega328P-PU | Package_DIP:DIP-28_W7.62mm | U4 |
| 1 | Conn_01x02_Male | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J22 |
| 1 | Conn_01x03_Female | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J26 |
| 1 | Conn_02x04_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x04_P2.54mm_Vertical | J21 |
| 1 | Crystal | Crystal:Crystal_HC18-U_Vertical | Y1 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U9 |
| 1 | LED | LED_THT:LED_D3.0mm | D8 |
| 1 | Screw_Terminal_01x04 | TerminalBlock:TerminalBlock_bornier-4_P5.08mm | J2 |
| 1 | Sim800l | sim800:sim800l | U5 |
| 1 | Speaker | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J14 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex_47346-0001 | J1 |
It measures 105 × 123 mm and has 2 copper layers, 1.6 mm thick.
86 parts, built around the ATMEGA328P-PU and SIM800L. 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.
From the saftamed/iot-pcb repository on GitHub, at the commit this page was made from: the board is g2.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask saftamed before reusing the design.

hanebefl/wandfernsprecher-hw
GSM conversion for a old German Wandfernsprecher telephone





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