anorimaki/selfbalancing-robot2A buck converter to generate the 5V power rail would have been a better choice because it would be more efficient (extending battery life) and eliminate the need of a second battery (the circuit could be plugged with…
To print is an open-source printed circuit board by anorimaki, from the anorimaki/selfbalancing-robot repository on GitHub. It is a 2-layer board of 162.6 × 123.2 mm with 124 parts on 63 nets, routed with 1,142 tracks and 4 vias.
It is built around the PIC24FJ32GA002-I/SP, ESP-12E and SN754410NE, with the L7805CV, LM1117T-3.3 and BC547 among its other parts. Its parts include 44 resistors, 16 capacitors, 14 connectors, 12 ICs and 8 diodes. It belongs with the ESP8266 and PIC boards of this library.
This directory contains schematics for KiCad suite.
There are two lineal regulators to generate power rails, a 7805 and a LM1117-3.3. The 7805 is connected to the battery which can not be the same battery used for the motors because too much power would be dissipated in the regulator. The motors need a 12V battery and the circuit consumes about 250mA, so it would be about 1.75W! With a dedicated 7.4V battery, the power dissipation is reduced but remains too high (about 600mW).
A buck converter to generate the 5V power rail would have been a better choice because it would be more efficient (extending battery life) and eliminate the need of a second battery (the circuit could be plugged with the 12V battery).
| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 12K | selfbalancingrobot:R-250mW | R6, R6, R7, R7, R10, R10, R11, R11, R12, R12, R17, R17, R18, R18 |
| 8 | 1K | selfbalancingrobot:R-250mW | R2, R2, R3, R3, R8, R8, R9, R9 |
| 8 | 1N4148 | selfbalancingrobot:DO-35 | D1, D1, D2, D2, D3, D3, D4, D4 |
| 8 | 220u | selfbalancingrobot:C-ALUM-8mm | C1, C1, C4, C4, C5, C5, C8, C8 |
| 8 | 4K7 | selfbalancingrobot:R-250mW | R4, R4, R5, R5, R13, R13, R15, R15 |
| 8 | 82 | selfbalancingrobot:R-250mW | R19, R19, R20, R20, R21, R21, R22, R22 |
| 6 | 100n | selfbalancingrobot:C-FILM-2.5mm | C2, C2, C6, C6, C7, C7 |
| 4 | Wire_Pads:SolderWirePad_single_0-8mmDrill | , , 3,3V, 3,3V | |
| 4 | 470 | selfbalancingrobot:R-250mW | R14, R14, R16, R16 |
| 4 | BC547 | selfbalancingrobot:TO-92 | Q1, Q1, Q2, Q2 |
| 4 | RESET | selfbalancingrobot:SW_PUSH_6mm_h5mm | SW2, SW2, SW3, SW3 |
| 2 | 10K | selfbalancingrobot:R-250mW | R1, R1 |
| 2 | 10u | selfbalancingrobot:C-ALUM-5mm | C3, C3 |
| 2 | DEBUG-TX | selfbalancingrobot:CONN-100MIL-M-1x1 | J7, J7 |
| 2 | ESP-12E | selfbalancingrobot:ESP-12 | U4, U4 |
| 2 | ESP-RS232 | selfbalancingrobot:CONN-100MIL-F-1x5 | J5, J5 |
| 2 | ESP_IND0 | selfbalancingrobot:LED-3mm | DS4, DS4 |
| 2 | ESP_IND1 | selfbalancingrobot:LED-3mm | DS3, DS3 |
| 2 | FLASH | selfbalancingrobot:SW_PUSH_6mm_h5mm | SW1, SW1 |
| 2 | ICSP | selfbalancingrobot:CONN-100MIL-M-1x6-SHROUD | J4, J4 |
| 2 | IND0 | selfbalancingrobot:LED-3mm | DS1, DS1 |
| 2 | IND1 | selfbalancingrobot:LED-3mm | DS2, DS2 |
| 2 | L7805CV | selfbalancingrobot:TO-220 | U1, U1 |
| 2 | LM1117T-3.3 | selfbalancingrobot:TO-220 | U3, U3 |
| 2 | MOT-LEFT | selfbalancingrobot:CONN-100MIL-M-1x6-SHROUD | J2, J2 |
| 2 | MOT-POWER | selfbalancingrobot:CONN-100MIL-M-1x2-SHROUD | J6, J6 |
| 2 | MOT-RIGHT | selfbalancingrobot:CONN-100MIL-M-1x6-SHROUD | J3, J3 |
| 2 | MPU-92/65_breakout_board | selfbalancingrobot:MPU9265_breakout | U5, U5 |
| 2 | PIC24FJ32GA002-I/SP | selfbalancingrobot:DIP-28 | U2, U2 |
| 2 | POWER | selfbalancingrobot:CONN-100MIL-M-1x2-SHROUD | J1, J1 |
| 2 | SN754410 | selfbalancingrobot:DIP-16 | IC1, IC1 |
The 116 most common of 124 parts.
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It measures 162.6 × 123.2 mm and has 2 copper layers, 1.6 mm thick.
124 parts, built around the PIC24FJ32GA002-I/SP, ESP-12E, SN754410NE and L7805CV. 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 anorimaki/selfbalancing-robot repository on GitHub, at the commit this page was made from: the board is schematics/to_print.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 anorimaki before reusing the design.