Rcl57 mcu
About the Rcl57 mcu PCB
Rcl57 mcu is an open source STM32 PCB design by tomcircuit, published on GitHub. It is a 4-layer board measuring 18 × 37 mm, with 21 components from 14 distinct parts.
Its main chip is the STM32F103TBUX, from the STM32 family. Other key parts include the TLC5929PWP, TLV70033_SOT23-5 and 11AA080/TT. By type, the board carries 6 capacitors, 4 ICs, 4 transistors, 4 resistors and 3 connectors.
It belongs with the retro computing designs in this gallery.
From the project
MCU-based retrofit to TI-57 Programmable Calculators
This project came about because I stumbled across a TI-57 calculator with a "bad brain". The TMC1501 calculator-on-a-chip was faulty. This, in turn, led me to read more about this particular calculator and how the CPU inside functions.
Fortunately, I am 'standing on the shoulders of giants' here - three people that have been of great help to me are Joerg Woerner, Jeff Parsons and Paul Novaes. All have humored me by answering my emails and helping me understand how the hardware works.
Main components on the Rcl57 mcu
Rcl57 mcu bill of materials (BOM)
21 components, 14 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F103TBUX STM32F103TBUx | QFN-36-1EP_6x6mm_P0.5mm_EP4.1x4.1mm | U1 |
| 1 | TLC5929PWP | TSSOP-24-1EP_4.4x7.8mm_P0.65mm_EP3.2x5mm | U2 |
| 1 | TLV70033_SOT23-5 | SOT-23-5 | U3 |
| 1 | 11AA080/TT | SOT-23 | U4 |
| 4 | DMP2240UDM-7 | SOT-23-6 | Q1, Q2, Q3, Q4 |
| 1 | TMC1500 p1-13 | PinHeader_1x13_P2.54mm_Vertical | J1 |
| 1 | TMC1500 p28-16 | PinHeader_1x13_P2.54mm_Vertical | J2 |
| 1 | STLINK | PinHeader_1x08_P2.00mm_Vertical | J3 |
| 4 | 100NF 100nF | C_0805_2012Metric | C1, C2, C4, C5 |
| 2 | 4.7UF 4.7uF | C_0805_2012Metric | C3, C6 |
| 1 | 2K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 47K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 330 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | YC158TJR-072KL YC158TJR-072KLn | R_Array_Convex_5x0603 | RN1 |
Rcl57 mcu design files
The KiCad project lives in the tomcircuit/rcl57mcu repository on GitHub; these links point at the commit this page was built from.
Rcl57 mcu: common questions
What microcontroller does the Rcl57 mcu use?
The Rcl57 mcu is built around the STM32F103TBUX, from the STM32 family.
How big is the Rcl57 mcu PCB?
The Rcl57 mcu measures 18 × 37 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Rcl57 mcu?
21 components, from 14 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 Rcl57 mcu design files?
From the tomcircuit/rcl57mcu 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 Rcl57 mcu design in my own project?
The repository has no license, so all rights stay with tomcircuit. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Rcl57 mcu without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
More boards in rcl57mcu
Similar boards
STM32LumenPnP Motherboard
opulo-inc
149 × 95 mm296 parts4LCC-BY-SA-4.03.7k
STM32AxxSolder
AxxAxx
39 × 82.5 mm122 parts2LGPL-3.01.7k
STM32LibreVNA
jankae
122 × 98 mm592 parts6LGPL-3.01.6k
STM32AIOC
skuep
21 × 31.5 mm47 parts2LMIT1.4k
STM32Ferris
pierrechevalier83
208.8 × 86.8 mm102 parts2LSHL-2.11.3k
STM32176 pin board
rusefi
61.8 × 73.2 mm76 parts2LGPL-3.01.2k