Motion-Activated Light Fixture Schematic
Budget: $50 – $0 USD
The project is for the freelance Contractor to:
1. Draft a schematic for a circuit and deliver the schematic to the Project Manager (Allen Pitts).
2. Review Gerber files drafted by the Project Manager for conformance with the schematic.
The schematic is the basis for a PCB that is the heart of a light fixture
for a relatively small space, a closet, pantry or under cabinet countertop.
The light fixture is turned on by a motion detector.
The schematic should incorporate the following elements.
Some flexibility is allowed if required by the design.
- 12 volt 2 amp power supply, AC to DC adapter, 110 volts AC to 12 volts DC.
- PIR motion detector HC-SR501.
- ATtiny85 microcontroller. ATtiny85 loaded with attached sketch written in Arduino
IDE, Closet_ATtiny85_250621.ino. Sketch programs ATtiny85 to recieve signal from PIR
and turn on the 12 volt load LEDs for twenty seconds. Simultanously, the sketch oscillates
a standard 5 mmm indicator LED to indicate that the microcontroller is
receiving power and operating.
- Three 12 volt LEDs, UNXMRFF 1156 LED Bulb or similar.
The Project Manager converts the schematic into Gerber files for
manufacture of PCB. Project Manager submits Gerber files to Contractor.
Contractor reviews Gerber files and advises Project Manager that
the Gerber files adhere to the schematic. Contractor advises
Project Manager of inconcistencies, if any between the schematic
and the Gerbers.
Several circuit schematics similar the one described here above are found
https://www.circuits-diy.com/night-activated-pir-motion-sensor-lamp/
https://www.instructables.com/Attiny85-AVR-Arduino-PIR-Triggered-Timed-Night-Lig/
https://forum.arduino.cc/t/pir-activated-led-with-attiny85/414977
But these and other examples have significant differences from
the system described: they operate on nine volt batteries or the
only turn on one LED. The 1156 lamps are 12 volts and draw .25 amps
each or .75 amps for the three.
1. Draft a schematic for a circuit and deliver the schematic to the Project Manager (Allen Pitts).
2. Review Gerber files drafted by the Project Manager for conformance with the schematic.
The schematic is the basis for a PCB that is the heart of a light fixture
for a relatively small space, a closet, pantry or under cabinet countertop.
The light fixture is turned on by a motion detector.
The schematic should incorporate the following elements.
Some flexibility is allowed if required by the design.
- 12 volt 2 amp power supply, AC to DC adapter, 110 volts AC to 12 volts DC.
- PIR motion detector HC-SR501.
- ATtiny85 microcontroller. ATtiny85 loaded with attached sketch written in Arduino
IDE, Closet_ATtiny85_250621.ino. Sketch programs ATtiny85 to recieve signal from PIR
and turn on the 12 volt load LEDs for twenty seconds. Simultanously, the sketch oscillates
a standard 5 mmm indicator LED to indicate that the microcontroller is
receiving power and operating.
- Three 12 volt LEDs, UNXMRFF 1156 LED Bulb or similar.
The Project Manager converts the schematic into Gerber files for
manufacture of PCB. Project Manager submits Gerber files to Contractor.
Contractor reviews Gerber files and advises Project Manager that
the Gerber files adhere to the schematic. Contractor advises
Project Manager of inconcistencies, if any between the schematic
and the Gerbers.
Several circuit schematics similar the one described here above are found
https://www.circuits-diy.com/night-activated-pir-motion-sensor-lamp/
https://www.instructables.com/Attiny85-AVR-Arduino-PIR-Triggered-Timed-Night-Lig/
https://forum.arduino.cc/t/pir-activated-led-with-attiny85/414977
But these and other examples have significant differences from
the system described: they operate on nine volt batteries or the
only turn on one LED. The 1156 lamps are 12 volts and draw .25 amps
each or .75 amps for the three.