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SIMPLECIRCUIT One-Line On-Off Power Control

FIGURE 1:

SIMPLECIRCUIT One-Line On-Off Power Control
Author: Chuck Angert Copper Ridge Systems
FIGURE 1:
FLOWCHART
Power-up Turn on Triac
INTRODUCTION
Allows µC power control via 1 pin. Upon pressing S1, Q1 turns on, supplying VIN. The PICmicro then powers on, and a port pin w / pulls-up is initialized as input w / pull-up on. This holds Q2 on and latches Q1. Power-down may now be requested by pressing S1 (low through D2) and / or µC code. µC turns off power by setting auxiliary to "output" and setting it to low level.
Decrement time
FIGURE 2:
SCHEMATIC
10k Q1 VIN Vcc 78L05 Vcc
PIC12C508
Microchip Technology Incorporated, has been granted a nonexclusive, worldwide license to reproduce, publish and distribute all submitted materials, in either original or edited form. The author has affirmed that this work is an original, unpublished work and that he / she owns all rights to such work. All property rights, such as patents, copyrights and trademarks remain with the author.
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