Engine monitor
About the Engine monitor PCB
Engine monitor is an open source AVR/Arduino PCB design by alexanderenrique, published on GitHub. It is a 2-layer board measuring 50.8 × 38.1 mm, with 60 components from 43 distinct parts.
Its main chip is the TLC555CP, from the AVR/Arduino family. Other key parts include the AP63205WU, AP2115M-3.3TRG1, MCP1406-E/SN, THVD1420D and MCP6561x-LT. By type, the board carries 17 capacitors, 17 resistors, 10 connectors, 6 ICs, 5 diodes and 1 transistor.
It belongs with the displays & leds designs in this gallery.
From the project
Smart Thunderbird vehicle electronics — ESP32 nodes, alternator delay, display, and tooling.
Electronics for the 1968 Thunderbird restomod — sensor nodes, in-dash display, alternator delay, programming tooling, and more.
Website: denton.works/microelectronics/T-bird_electronics
Active development is on the platformIO branch.
Main components on the Engine monitor
Engine monitor bill of materials (BOM)
60 components, 43 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TLC555CP ATtiny3216-S | SOIC-20W_7.5x12.8mm_P1.27mm | U1 |
| 1 | AP63205WU | TSOT-23-6 | U2 |
| 1 | AP2115M-3.3TRG1 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U3 |
| 1 | MCP1406-E/SN | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.62x3.51mm | U4 |
| 1 | THVD1420D | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | MCP6561x-LT | SOT-23-5 | U6 |
| 1 | FQD11P06TM IRLS3036 | TO-263-3_TabPin2 | Q1 |
| 1 | temp_1 | Alex_35thou_wire_hole | J1 |
| 1 | temp_2 | Alex_35thou_wire_hole | J2 |
| 1 | temp_3 | Alex_35thou_wire_hole | J3 |
| 1 | PWR_in | PinHeader_2x01_P2.54mm_Vertical | J4 |
| 1 | SW_Fan_GND | PinHeader_1x01_P1.00mm_Vertical | J5 |
| 1 | rs-485 | PinHeader_2x01_P2.54mm_Vertical | J6 |
| 1 | temp_4 | Alex_35thou_wire_hole | J7 |
| 1 | O2_sensor | PinSocket_1x03_P1.00mm_Vertical | J8 |
| 1 | GND_conn | Alex_1pin_065thou | J9 |
| 1 | Tach+ | Alex_1pin_065thou | J10 |
| 1 | Fuse | Fuseholder_Blade_Mini_Keystone_3568 | F1 |
| 1 | Thermistor_NTC | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | TH1 |
| 1 | Tach | Alex_35thou_wire_hole | TP4 |
Show 23 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SZ1SMB15AT3G TVS-15V | D_SMB_Handsoldering | D1 |
| 1 | SZ1SMB15AT3G SM712_SOT23 | SOT-23 | D2 |
| 2 | 1N5819 | D_SOD-123 | D3, D4 |
| 1 | LED | LED_D3.0mm | D10 |
| 1 | 4.7uH | L_1008_2520Metric_Pad1.43x2.20mm_HandSolder | L1 |
| 1 | 0.1UF 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 47UF 22uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 0.1UF 22uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 1 | 1UF 10uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4 |
| 9 | 0.1uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C5, C9, C10, C11, C12, C13, C14, C15 +1 |
| 2 | 4.7uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C6, C7 |
| 1 | 10uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C8 |
| 1 | 220pF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C17 |
| 1 | 220K 2k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 100 2k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2 |
| 1 | 10K 2k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 1 | 100K 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4 |
| 5 | 2k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5, R7, R8, R9, R15 |
| 3 | 10k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R10, R14 |
| 1 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R11 |
| 1 | 120 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R12 |
| 2 | 100k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R13, R16 |
| 1 | 220 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R37 |
Engine monitor design files
The KiCad project lives in the alexanderenrique/smart_tbird repository on GitHub; these links point at the commit this page was built from.
Engine monitor: common questions
What microcontroller does the Engine monitor use?
The Engine monitor is built around the TLC555CP, from the AVR/Arduino family.
How big is the Engine monitor PCB?
The Engine monitor measures 50.8 × 38.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Engine monitor?
60 components, from 43 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 Engine monitor design files?
From the alexanderenrique/smart_tbird 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 Engine monitor design in my own project?
The repository has no license, so all rights stay with alexanderenrique. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Engine monitor without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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