Misc
About the Misc PCB
Misc is an open source PIC PCB design by kwiecinski, published on GitHub under the MIT license. It is a 2-layer board measuring 99.5 × 99.5 mm, with 152 components from 71 distinct parts.
Its main chip is the PIC16F819-ISO, from the PIC family. Other key parts include the LT4320xDD-1, 74HC595, ST485, INA226 and LT3652EMSE. By type, the board carries 66 resistors, 24 capacitors, 17 diodes, 15 transistors, 15 connectors and 11 ICs.
It belongs with the iot & wireless, power & battery and sensors designs in this gallery.
From the project
Project contains BMS for lead-acid batteries and ESP-based board used to pull information from EASUN offgrid inverter, energy meters and sensors. It show informations od displays and use ESPhome to send it to Home Assistant..
1. Photovoltaic modules 2. Concrete base mounting 3. Metalworking and welding mounting bases and angle bar 4. Painting mounting base, angle bars and perforated profiles 5. PV mountings to perforated profiles 6. Assembly of PV installation 7. Fully assembled PV installation 8. Underground Cable Installation and Connection to the Building
B. EASUN inverter - description, installation schematic and wiring #### C. Managemenet system part: - BMS for lead-acid batteries - equalize battery, protect from large charge/discharge currents, montors battery state (temp, voltage) - ESP32 Master module -…
Main components on the Misc
Misc bill of materials (BOM)
152 components, 71 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LT4320xDD-1 | DFN-8-1EP_3x3mm_P0.5mm_EP1.65x2.38mm | U1 |
| 2 | 74HC595 | SOIC-16_3.9x9.9mm_P1.27mm | U2, U14 |
| 1 | ST485 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 2 | INA226 | VSSOP-10_3x3mm_P0.5mm | U4, U7 |
| 1 | LT3652EMSE | MSOP-12-1EP_3x4mm_P0.65mm_EP1.65x2.85mm | U5 |
| 1 | LM358 | SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | MC34063AP | DIP-8_W7.62mm | U8 |
| 1 | PIC16F819-ISO | SOIC-18W_7.5x11.6mm_P1.27mm | U9 |
| 1 | TL431LP | TO-92_Inline_LITTLE_BIGGER | U10 |
| 7 | BC817 | SOT-23 | Q1, Q2, Q8, Q9, Q10, Q13, Q14 |
| 4 | IRF540N | TO-220-3_Vertical-little-bigger pads | Q3, Q4, Q5, Q6 |
| 2 | BC547 | TO-92_Inline_LITTLE_BIGGER | Q7, Q19 |
| 2 | BC807 | SOT-23 | Q11, Q12 |
| 1 | DIODE_BLINK_METER | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J1 |
| 1 | AC_IN | SolderWire-2.5sqmm_1x02_P7.2mm_D2.4mm_OD3.6mm | J2 |
| 1 | DC_OUT | SolderWire-2.5sqmm_1x02_P7.2mm_D2.4mm_OD3.6mm | J3 |
| 2 | LCD_CONN | JST_XA_B05B-XASK-1_1x05_P2.50mm_Vertical | J4, J19 |
| 1 | LCD_DISPLAY | PinHeader_2x09_P2.54mm_Vertical | J5 |
| 1 | SOLAR_PANEL | TerminalBlock_bornier-2_P5.08mm | J6 |
| 1 | RS485 | PinHeader_1x04_P2.54mm_Vertical | J7 |
Show 51 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | THERMISTOR | JST_XA_B02B-XASK-1-A_1x02_P2.50mm_Vertical | J8, J9 |
| 1 | BATT | TerminalBlock_bornier-2_P5.08mm | J10 |
| 1 | ICP | PinHeader_1x06_P2.54mm_Vertical | J11 |
| 1 | LCD_DISPLAY | JST_XA_B05B-XASK-1-A_1x05_P2.50mm_Vertical | J12 |
| 1 | DIODE_BLINK_METER_OUT | PinHeader_1x04_P2.54mm_Vertical | J13 |
| 1 | LCD16x2 | PinSocket_1x16_P2.54mm_Vertical | J20 |
| 2 | 10k | Potentiometer_ACP_CA9-V10_Vertical | RV1, RV3 |
| 1 | LL4148 BPV10 | LED_D5.0mm | D1 |
| 3 | BPV10 | LED_D5.0mm | D2, D20, D21 |
| 3 | D_Schottky | D_SMB | D3, D6, D10 |
| 2 | D_TVS | D_SMA | D4, D5 |
| 1 | 1N4148 | D_MiniMELF | D7 |
| 5 | LED | LED_D5.0mm | D8, D9, D11, D12, D13 |
| 1 | SMAJ60A | D_SMA | D14 |
| 1 | SMAJ60CA | D_SMA | D15 |
| 1 | L | L_Bourns_SRR1208_12.7x12.7mm | L1 |
| 1 | 220uH | L_Radial_D10.0mm_P5.00mm_Fastron_07P | L2 |
| 4 | 470u/6,3V | CP_EIA-3528-21_Kemet-B | C1, C2, C19, C20 |
| 1 | 470u/6,3V | CP_Radial_D6.3mm_P2.50mm | C3 |
| 3 | 100n | C_0805_2012Metric | C4, C13, C22 |
| 3 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C9, C15 |
| 1 | 470u/40V | CP_Radial_D10.0mm_P3.50mm | C6 |
| 4 | 100n | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | C7, C12, C18, C23 |
| 1 | 0R | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 1u/10V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 470u/16V | CP_Radial_D10.0mm_P5.00mm | C11 |
| 1 | 670u/35V | CP_Radial_D10.0mm_P5.00mm | C14 |
| 1 | 100p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C16 |
| 1 | 560u/6,3V | CP_Radial_D6.3mm_P2.50mm | C17 |
| 1 | 470u/6,3V | CP_Elec_5x5.7 | C21 |
| 1 | 1u/100v | C_1206_3216Metric | C24 |
| 4 | 47k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R48, R49 |
| 3 | 22k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R50, R51 |
| 1 | 10K 22k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 12 | 10k | R_0805_2012Metric | R5, R6, R7, R8, R9, R15, R71, R73 +4 |
| 4 | R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R11, R78, R79 |
| 4 | R | R_1206_3216Metric | R12, R13, R80, R81 |
| 2 | 39k | R_0805_2012Metric | R14, R72 |
| 4 | 10R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R52, R54, R55 |
| 2 | 50m | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R17, R30 |
| 4 | 510R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18, R20, R21, R22 |
| 1 | 120R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19 |
| 10 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23, R24, R31, R32, R33, R34, R36, R42 +2 |
| 4 | 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25, R26, R27, R29 |
| 1 | 50mR | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R28 |
| 5 | 220R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R35, R37, R43, R45, R47 |
| 1 | 500m | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R38 |
| 1 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R39 |
| 1 | 10k | C_0805_2012Metric | R40 |
| 1 | 3k3 | C_0805_2012Metric | R41 |
| 1 | 100m | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R53 |
Misc design files
The KiCad project lives in the kwiecinski/BMS-and-offgrid-photovoltaic-management-system repository on GitHub; these links point at the commit this page was built from.
Misc: common questions
What microcontroller does the Misc use?
The Misc is built around the PIC16F819-ISO, from the PIC family.
How big is the Misc PCB?
The Misc measures 99.5 × 99.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Misc?
152 components, from 71 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 Misc design files?
From the kwiecinski/BMS-and-offgrid-photovoltaic-management-system repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Misc design in my own project?
Yes, under the terms of its MIT license, which kwiecinski chose for the repository.
Can I test firmware for the Misc 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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