Low voltage cutoff, wireless signals, and transistor switching.

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hi guys!

i'm making project involves having 2 separate arduinos communicating 433 mhz rf transmitter/receiver combos.

i'm better programming side of things i'm hoping on circuitry.

one of arduinos run on 3.7v battery , packed in small box. control 10 leds, motor, , speaker based on wireless signals receives. i've found battery charger board cuts lithium battery off @ 2.5v , on @ 2.9v (after recovers) i've adapted 5v booster board , 4077 quad nor ic make cutoff circuit keeps arduino off after battery has died , recovered, until usb plugged in. keeps arduino off while charging battery.


will voltage booster , 4077 draw lot of current drained battery if isn't recharged few days? need resistors or diodes in there?

how big of battery might need power 10 leds, 170ma motor, rf transeiver set, , speaker on 8% duty cycle few days? through 5v booster.

besides think i'll using arduino pwm control 2n3906 transistors switch leds, motor (ff130), , speaker, should under  200 ma each. might need bigger transistor motor current.


i'm new @ hardware stuff let me know if makes sense!



Arduino Forum > Using Arduino > Project Guidance > Low voltage cutoff, wireless signals, and transistor switching.


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