Surge Arrestor Circuit with Measuring Facility

In this post we learn about a simple surge voltage protector circuit using a fuse and a triac crowbar circuit and also learn the method to record and measure the last maximum surge that could have destroyed the specified load in case the protection was not introduced. The idea was requested by Mr. Akram. Circuit … Read moreSurge Arrestor Circuit with Measuring Facility

High Power Industrial Mains Surge Suppressor Explored

The post explains a high energy surge suppressor circuit for suppressing high current mains surges in industrial electrical. The Circuit Problem: I’ve been reading a lot of your design ideas and I am extremely impressed with your designs. I don’t have anywhere near your level of expertise, but I can follow directions very well. I … Read moreHigh Power Industrial Mains Surge Suppressor Explored

How to Test a MOV (Metal Oxide Varistor) Surge Protector Device

The article discusses a set up for testing MOVs which are special devices specified for absorbing instantaneous high surge currents that may accidentally occur in our mains electrical lines. The idea was requested by Mr. Kevin  Technical Specifications  I’m Kevin Montañez, a university Electrical Engineering student here in Cebu, Philippines. As I told you before, … Read moreHow to Test a MOV (Metal Oxide Varistor) Surge Protector Device

Using an NTC Thermistor as a Surge Suppressor

In this post we learn how to use an NTC in circuits for suppressing surge current during power switch ON. We also learn the datasheet and the electrical specifications of an NTC. Today electronics is getting more and more compact and light weight, it’s basically due to the involvement of compact converters which have completely … Read moreUsing an NTC Thermistor as a Surge Suppressor

Surge Protected Cheap Transformerless Hi-Watt LED Driver Circuit

The increased number of complaints from the readers regarding burning LEDs associated with my earlier posted transformerless 1 watt LED driver circuit, compelled me to solve the issue once for all. The power supply section of the circuit discussed here remains exactly identical to the previous configuration, except the inclusion of the “switch ON delay … Read moreSurge Protected Cheap Transformerless Hi-Watt LED Driver Circuit

AC 220V/120V Mains Surge Protector Circuits

Voltage spikes  can sometimes be a big nuisance as far as the safety of the various electronic appliances are concerned. Let’s learn how to make a simple AC Mains surge protector circuits at home. What is Voltage In Rush A sudden voltage spike is basically a sharp rise in the voltage lasting not more than … Read moreAC 220V/120V Mains Surge Protector Circuits