In one of our earlier article, we learned how to build automatic street light circuits using single and double transistors, an IC 555 timer and a solar panel configuration. Today we are going to investigate another design from our collection which uses famous IC 741 operational amplifier as a precision voltage comparator. If you are […]
Sensors and Detectors
Build this Simple Two Transistor Automatic Street Light Circuit
In our previous articles, we learned how to build automatic street light circuit using a single transistor, an IC 555 and a solar panel setup. Today we are going to investigate the fourth design from our collection which is a very popular and reliable automatic street light circuit using just two transistors and a relay. […]
DIY IC 555 Based Automatic Street Light Circuit
In one of our article, we learned how to make a basic automatic street light using a single transistor. Even though that single transistor circuit is very cheap and good for beginner, its switching point during evening and morning can sometime be a little wide or slow. Today we are going to learn how to […]
Simple LED Solar Street Light Circuit
We learned how to make automatic street light circuits using a single transistor and an IC 555. But what will you do if there is no AC mains electricity near your village road, then farm house, or outdoor gate? For such places where 220V power is not available, a solar powered automatic street light is […]
Precision 4-Transistor Automatic Street Light Circuit
In this post we are going to look at a very special and robust design: a purely discrete 4 transistor automatic street light circuit. Many hobbyists ask me why we should use four transistors instead of a simple IC 555 or an op amp. The main reason is that some makers love old school, pure […]
How to Build a Simple Single Transistor Automatic Street Light Circuit
In this article we are going to learn how to build a very simple and cheap automatic street light circuit using only a single transistor. If you are a beginner in electronics and you want to make an automatic lamp that turns on by itself during evening and turns off in morning without any manual […]