QI Charger
About the QI Charger PCB
QI Charger is an open source PIC PCB design by drewsum, published on GitHub. It is a 2-layer board measuring 150 × 50 mm, with 293 components from 80 distinct parts.
Its main chip is the PIC18F27K40T-I_ML, from the PIC family. Other key parts include the LTC4365DDB, INA138, TPS62130, 74LVC1G17 and OPA340NA. By type, the board carries 113 resistors, 108 capacitors, 36 ICs, 13 diodes, 7 connectors and 5 inductors.
It belongs with the iot & wireless, power & battery and displays & leds designs in this gallery.
From the project
A DIY QI Wireless Phone Charger
A DIY QI Wireless Phone Charger with Digital Monitoring, OLED Display, and USB Virtual COM Port
Requires drewsum's 'KiCadCustomLibraries' git repository for custom symbols and footprints
Microcontroller U503 is programmed via header J401 using PIC KIT 3, with firmware located at sfw/U503Firmware/QIMonitor.X
Built with Microchip compiler XC8 V1.45, IDE MPLAB V5.15
Main components on the QI Charger
QI Charger bill of materials (BOM)
293 components, 80 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LTC4365DDB | DFN-8-1EP_2x3mm_Pitch0.5mm | U201 |
| 2 | INA138 | SOT-23-5 | U202, U1301 |
| 1 | TPS62130 | QFN-16-1EP_3x3mm_Pitch0.5mm | U301 |
| 4 | 74LVC1G17 | SOT-353_SC-70-5 | U302, U501, U502, U1403 |
| 1 | PIC18F27K40T-I_ML | QFN-28-1EP_6x6mm_Pitch0.65mm | U503 |
| 4 | OPA340NA | SOT-23-5 | U601, U602, U603, U604 |
| 1 | SSD1306 | Pin_Header_Straight_1x04_Pitch2.54mm | U701 |
| 2 | AT42QT1010-TSHR | SOT-23-6 | U801, U802 |
| 1 | ISO7321C | SOIC-8_3.9x4.9mm_Pitch1.27mm | U901 |
| 1 | LT6700-1-S6 | TSOT-23-6 | U1001 |
| 1 | FT234XD | DFN-12-1EP_3x3mm_Pitch0.45mm | U1002 |
| 7 | 74LVC1G06 | SOT-353_SC-70-5 | U1003, U1101, U1104, U1106, U1107, U1108, U1109 |
| 1 | TPD3S014DBVR | SOT-23-6 | U1004 |
| 2 | 74LVC1G07 | SOT-353_SC-70-5 | U1102, U1105 |
| 1 | 74LVC1G06 | SOT-353_SC-70-5 | U1103 |
| 3 | LM73-1 | SOT-23-6 | U1201, U1202, U1203 |
| 1 | NXQ1TXH5_101J | QFN-32-1EP_5x5mm_Pitch0.5mm | U1302 |
| 2 | 74LVC1G14 | SOT-353_SC-70-5 | U1401, U1402 |
| 2 | IPC100N04S51R7ATMA1 | TDSON-8-1 | Q201, Q202 |
| 1 | BSS214NW | SOT-323_SC-70 | Q401 |
Show 60 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 32.768KHZ 32.768kHz | Crystal_SMD_G8-2pin_3.2x1.5mm | Y1301 |
| 1 | CP-202BH +12V IN | BARREL_JACK | J201 |
| 1 | PICKIT3 | PICKIT3_Header | J401 |
| 1 | I2C | Pin_Header_Straight_1x03_Pitch2.54mm | J701 |
| 1 | UART | Pin_Header_Straight_1x03_Pitch2.54mm | J901 |
| 1 | 732-2109-1 USB_B_Mini | USB_Mini-B | J1001 |
| 2 | 732-3214 PAD | Wuerth_7461096_M4_Shank_9pos | J1301, J1302 |
| 1 | MRST | SW_PUSH_6mm | SW401 |
| 2 | Cap_Touch | Capacitive_Touch_Pad | SW801, SW802 |
| 1 | 100K 100k | R_0603 | TH1301 |
| 3 | TP | Pin_Header_Angled_1x01_Pitch2.54mm | TP201, TP204, TP1002 |
| 1 | 24V | D_SMA | D201 |
| 5 | 160-1446-1 Green | LED_0603 | D1001, D1105, D1107, D1108, D1109 |
| 1 | 160-1448-1 Yellow | LED_0603 | D1002 |
| 5 | 160-1447-1 Red | LED_0603 | D1101, D1102, D1103, D1104, D1106 |
| 1 | MBR0530 | D_SOD-123 | D1301 |
| 1 | 2.2U 2.2u | L_Vishay_IHLP-2020 | L301 |
| 4 | 732-2389-1 600R 0.5A | L_0603 | L501, L502, L1001, L1002 |
| 48 | 0.1UF 0.1uF | C_0603 | C201, C204, C205, C303, C304, C401, C402, C501 +40 |
| 24 | 10NF 10nF | C_0603 | C202, C206, C302, C305, C504, C507, C603, C604 +16 |
| 18 | 1NF 1nF | C_0603 | C203, C207, C208, C306, C505, C508, C605, C606 +10 |
| 2 | 100UF 100uF | CP_Tantalum_Case-X_EIA-7343-43_Reflow | C209, C1323 |
| 1 | 10UF 10uF | C_1206 | C301 |
| 4 | 22UF 22uF | C_1206 | C307, C308, C1307, C1308 |
| 1 | 1UF 1uF | C_0805 | C704 |
| 1 | 4.7UF 4.7uF | C_0805 | C1006 |
| 2 | 47PF 47pF | C_0603 | C1009, C1010 |
| 1 | 2.2PF 2.2pF | C_0603 | C1305 |
| 2 | 6.8NF 6.8nF | C_0603 | C1313, C1315 |
| 2 | 22NF 22nF | C_0603 | C1318, C1322 |
| 2 | 82NF 82nF | C_0603 | C1320, C1321 |
| 1 | 6.04M | R_0603 | R201 |
| 1 | 86.6K 86.6k | R_0603 | R202 |
| 1 | 243K 243k | R_0603 | R203 |
| 5 | 100K 100k | R_0603 | R204, R302, R305, R1308, R1404 |
| 3 | 10 | R_0603 | R205, R206, R401 |
| 41 | 10K 10k | R_0603 | R207, R301, R308, R402, R404, R503, R504, R505 +33 |
| 2 | 5.1K 5.1k | R_0603 | R208, R607 |
| 2 | 0.02 | R_0612 | R209, R1303 |
| 1 | 499K 499k | R_0603 | R210 |
| 2 | 10.5K 10.5k | R_0603 | R303, R306 |
| 2 | 249K 249k | R_0603 | R304, R1304 |
| 1 | 2k | R_0603 | R307 |
| 1 | 100 | R_0603 | R403 |
| 13 | 0 | R_0603 | R405, R501, R502, R701, R702, R803, R804, R1201 +5 |
| 13 | 1k | R_0603 | R406, R1006, R1009, R1104, R1105, R1106, R1109, R1110 +5 |
| 6 | 499 | R_0603 | R603, R604, R605, R608, R801, R802 |
| 1 | 487K 487k | R_0603 | R1002 |
| 1 | 6.04k | R_0603 | R1003 |
| 1 | 40.2K 40.2k | R_0603 | R1004 |
| 2 | 27 | R_0603 | R1007, R1008 |
| 2 | 390K 390k | R_0603 | R1301, R1302 |
| 1 | 47K 47k | R_0603 | R1305 |
| 1 | 43K 43k | R_0603 | R1307 |
| 1 | 130K 130k | R_0603 | R1309 |
| 1 | 1M | R_0603 | R1310 |
| 3 | 15K 15k | R_0603 | R1311, R1314, R1316 |
| 2 | 1 | R_0603 | R1312, R1313 |
| 1 | 1.8K 1.8k | R_0603 | R1315 |
| 1 | 27K 27k | R_0603 | R1317 |
QI Charger design files
The KiCad project lives in the drewsum/QI_Charger repository on GitHub; these links point at the commit this page was built from.
QI Charger: common questions
What microcontroller does the QI Charger use?
The QI Charger is built around the PIC18F27K40T-I_ML, from the PIC family.
How big is the QI Charger PCB?
The QI Charger measures 150 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the QI Charger?
293 components, from 80 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the QI Charger design files?
From the drewsum/QI_Charger repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the QI Charger design in my own project?
The repository has no license, so all rights stay with drewsum. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the QI Charger without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.
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