STM32F103C8T6 Orao
For this project I used a development board with STM32F103C8T6 microcontroller also known as "Blue Pill" and 23LC1024 serial SRAM. Both can be purchased on eBay for as little as 6 USD. 23LC1024 is optional, but without it Orao will have only 17 KB instead of 32 KB RAM.
Electronic schematic
The circuit generates a composite PAL video signal, and the programs are loaded via the analog audio input as with the original Orao computer.
Finished electronic circuit
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In operation
Video captured directly from composite output.
Downloads
| stm32f103c8t6_orao_sram.bin | BIN file to burn into STM32F103C8T6 microcontroller |
| stm32f103c8t6_orao.bin | version without 23LC1024 SRAM |