Single Chip Computer

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Simple Single Chip Computer running MCS BASIC-52 with wireless connectivity between PC or Phone. No external crystal, latch or RAM required!

mit41301

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USB-TTL using CH551G
02/24/2026 at 05:55 • 0 comments

Since there is only one Chip used in the DIP40 board, there are lots of empty space. So there is a USB-TTL circuit added using CH551G.
With the integrated USB-TTL, we can connect the Single Chip Computer to a PC using VCC, GND, D+ and D- of the USB port. We do not need a external USB-TTL circuit.
Integrated USB-TTL circuit using CH551G - SOP16
Integrated USB-TTL circuit with microUSB connector
Just using VCC, GND, D+ and D- we can connect the Single Chip Computer to a PC serial terminal via USB port. The power for Single Chip Computer and USB-TTL circuit drawn from USB port. No external power supply required.