Serial One Pin LCD Module by 89C2051

There years ago, I am working on several design related to a tiny but powerful MCU 89C2051.

Interface a 16x2 character LCD module by 89C2051 and programed by BASCOM 8051.

89C2051 as the LCD Module interface controller so that I can use only one pin to put ALL LCD module command to the LCD Module. I think this idea is great and start to make:

• Serial One Pin LCD Module with several options
• Serial One Pin keyboard matrix reading
• Serial One Pin I/O expander
• Serial One Pin 4-digit LED display (7-segement Read LED unit)

Even I build them as Kit and sell in eBay until I have no time to manage them!

Blind man's watch by Voice MCU

I am working in a Toy manufacturer now and have any chance to get Voice MCU running at 4-bit or 8-bit core. It is really low cost when during mass production.

However, I find that there are several IC manufacturer proivde OTP (One Time Programing) Voice MCU whicch is very suitable for Low volume production and Hobby purpose.

APM020 is a very good example:
It consists:

• 20 sec. voice sound (can direct input wave file)
• Maximum 12 Input/Output pin.
• RISC MCU structure running at 45MHz !!!
• Easy Handle at DIP package.

I have an idea to build a Blind man' watch by it.

Any comment?