Emilio Ricciardelli
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Tools, APP Software Used etc.
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EagleAutodesk
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Description
BT Smartphone detector
A simple USB device which when energized detects your Smartphone. If not detected, beeps. Used as a reminder in my car as I often forget the phone at home or at the office ;)
Code
Arduino code for ATTINY85 chip
C/C++
/* 1 (PB5) - - (Vcc) 8 2 (PB3) - - (PB2) 7 3 (PB4) - - (PB1) 6 4 (GND) - - (PB0) 5 PB5 -> 10 PB0 -> 11 PB1 -> 12 PB2 -> 13 REV. 2-7-2019 */ //#include <SoftwareSerial.h> //SoftwareSerial Monitor(5, 4); int duration = 0; void setup() { pinMode(BUZZER, OUTPUT); pinMode(POWER, OUTPUT); pinMode(PULSE_IN, INPUT); // used for serial /* pinMode(0, OUTPUT); pinMode(4, OUTPUT); // --> TX pinMode(5, INPUT); // --> RX Monitor.begin(9600); */ digitalWrite(POWER, HIGH); digitalWrite (BUZZER, HIGH); //wait fot BT to come up delay(20000); } void loop() { duration = pulseIn(PULSE_IN, LOW) / 100; if (duration > 0) { for (int i = 0; i < 30; i++) { beep(500, 100); } //turn off BT digitalWrite(POWER, LOW); pinMode(POWER, INPUT); sleep(); } else { //turn off BT digitalWrite(POWER, LOW); pinMode(POWER, INPUT); sleep(); } } void beep(unsigned char delay_ms, unsigned char duration) { analogWrite(BUZZER, duration); // Almost any value can be used except 0 and 255 // experiment to get the best tone delay(delay_ms); // wait for a delay ms analogWrite(BUZZER, 0); // 0 turns it off delay(delay_ms); // wait for a delay ms } void sleep() { set_sleep_mode(SLEEP_MODE_PWR_DOWN); ADCSRA = 0; // ADC off power_all_disable(); sleep_enable(); sleep_cpu(); // sleep }
Schematic and Layout
Diagrams
BluetoothUSB.sch
Nov 02,2021
723 views
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BT Smartphone detector
A circuit to detect the absence of a Smartphone. Will beep when plugged in and your Smartphone (or whatever BT device) it's not in range.
723
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0
Published: Nov 02,2021
BOM(Bill of materials)
PCBWay Donate 10% cost To Author
Under the
Attribution-ShareAlike (CC BY-SA)
License.
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