latch circuit not standalone for ESP8266 using bjt

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01:38:45

it is dimensioned for a ESP-12F MCU. The 
1. upper push button when pressed turn on the latch

2. after MCU process can safetly request to be turned off through down push button

load is simulated by a 25ohm resistence, so the continuos active current is about 70mA as from datasheet. 

load is simulated by a 1ohm resistance so the current required is about 500mA for peak simulation. 

using a 120ohm resistance on base I'll have a 3.12V of power supply in case of continuos active state. 

a power supply of 2.26V on case of peak to 500mA 

10uF cap is needed for peak management. 2.26V would be to low as power supply, 

mosfet is a better solution:
https://everycircuit.com/circuit/4552882756780032

published 5 years ago

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