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STC No-Cold-Start Burner, STC Automatic Downloader - Software PRO Version

Overview

The previously DIY [【Cold Start Programmer】(https://oshwhub.com/monhoi/stcautodownload-versw)] could only program bare chips. When the microcontroller board had many resources and an external power supply (more than 5V input), it became useless.

Therefore, a new version was designed that can switch on and off power supplies up to 36V. This programmer controls the overall power supply to the STC microcontroller board, enabling hands-free, one-click programming. See the demonstration video below.

When the compile button is clicked in Keil C51, the download software STC-ISP automatically initiates programming. The automatic programmer detects the download command, disconnects the power supply to the target board (including the microcontroller on it), restores power after 1 second, and begins programming.

The LCD screen is negligible and not necessary.

![Front]

![Back]

![Wiring Instructions]

Design Files

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Update:2026-03-26 03:15:28

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