Night light (modified)

Hopefully I’m in the right place. I have zero background in electronics so forgive my ignorance here. Over a year or so I’ve made a circuit that includes a photocell, motion sensor, relays, transistors (for darlington effect) voltage reducing board. The board is to turn on and off as the sun rises and falls. At night it powers led strips (30’ ish) but only at half power. When a pir triggers, the lights go to full power for the set time in the pir and drops back to half power and continues to work that way until the sun comes up. I’ve made several of these boards but seem to run in to a different problem with each. It works great on a breadboard. I use a laptop power supply to run all of it. I’d like to simplify the board to say a 555 or something else that will work but, again, I have no idea where to start.

by Blanktout
June 20, 2019
Add comment...

Please sign in or create an account to comment.


No Answers

No answers yet. Contribute your answer below!


Your Answer

You must log in or create an account (free!) to answer a question.

Log in Create an account


Go Ad-Free. Activate your CircuitLab membership. No more ads. Save unlimited circuits. Run unlimited simulations.

Search Questions & Answers


Ask a Question

Anyone can ask a question.

Did you already search (see above) to see if a similar question has already been answered? If you can't find the answer, you may ask a question.


About This Site

CircuitLab's Q&A site is a FREE questions and answers forum for electronics and electrical engineering students, hobbyists, and professionals.

We encourage you to use our built-in schematic & simulation software to add more detail to your questions and answers.

Acceptable Questions:

  • Concept or theory questions
  • Practical engineering questions
  • “Homework” questions
  • Software/hardware intersection
  • Best practices
  • Design choices & component selection
  • Troubleshooting

Unacceptable Questions:

  • Non-English language content
  • Non-question discussion
  • Non-electronics questions
  • Vendor-specific topics
  • Pure software questions
  • CircuitLab software support

Please respect that there are both seasoned experts and total newbies here: please be nice, be constructive, and be specific!

About CircuitLab

CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.