App note: Four channel digital voltmeter with display and keyboard

in app notes by DP | 1 comment

ap_4_channel_dvoltmeter_w_disp_key

Here’s an old but quite clever approach app note from Microchip on utilizing microcontroller I/O’s to handle multiple display and switches with only few pins.

This application note demonstrates the capability of the PIC16C71 and has been broken down into four subsections:
• Multiplexing Four 7-Segment LED Displays
• Multiplexing Four 7-Segment LED Displays and Scanning a 4×4 Keypad
• Multiplexing Four 7-Segment LED Displays and the A/D Channel 0
• Multiplexing Four 7-Segment LED Displays with a 4×4 Keypad and 4 A/D Channels
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Comments

  1. Alex Henrique says:

    I think this is good idea. Some days ago I’m just thinking about do same thing with LCD displays.

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