Category: Embedded-Systems

Digital Music Player with Amplifier

I need to know as making an amplifier with a port USB as music storage in a memory Flash, which circuit integrated (more…)

This circuit is a Parallel interface between 89C52 of Atmel with 7135 of Intersil. With This circuit you can read analog data (more…)

The Early Microcontroller : 80C39 is a CMOS Version of 8048 the one that preceded 8031-8051. MCS48 is the set for that, (more…)

This circuit can be used as a low cost SRAM and Microcontroller or Microprocessor Battery Backup. All the diodes are 1N4148, The (more…)

This is the continuation of the earlier post. Part of 80C39 based Process Controller. In this schematic you can see the Watchdog (more…)

This is a 9V power supply which will work even on power failure. It uses a rechargeable battery and regulators. A transformer (more…)