The post helps us to understand 3 inverter circuits designed to work without a transformer, and using a full bridge IC network and a SPWM generator circuit. The first idea as given below was requested by Mr. Ralph Wiechert Main Specifications Greetings from Saint Louis, Missouri. Would you be willing to collaborate on an inverter project? […]
Search Results for: transformerless
Transformerless AC Voltmeter Using Arduino
In this article we learn how to make a transformerless AC voltmeter using Arduino. Making an analog voltmeter is not an easy task as to build one you must have good knowledge of physical quantities like torque, speed; which can be very difficult when it comes to their practical applications. By Ankit Negi But a […]
50V Adjustable Transformerless Power Supply
A simple yet efficient 220V operated transformerless 50V adjustable power supply circuit using a single IC SR087 is discussed in the following article. The design does not depend on high value capacitors or inductors and yet is capable of delivering 100mA current to the attache load. Main Features and Board Layout The Main features […]
Transformerless 0-400V Power Supply
A cool 0-400V variable transformerless power supply circuit can be built using just a single chip LR8, and a few resistors. The IC features a built in current control stage which makes the design extremely safe even for critical electronic circuits. How LR8 IC is Designed to Work The IC LR8 is quite similar to […]
Transformerless PWM Mains Voltage Stabilizer
The post discusses a simple circuit design which ensures a perfectly stabilized mains voltage across the connected load, without using relays or transformers, rather by the use of accurately dimensioned and self adjusting PWM pulses. The idea was requested by Mr. Mathew. Technical Specifications About power optimizer (stabilizer) I need a simple circuit board which […]
Transformerless Constant Current LED Driver
In this post we learn how just a single IC MBI6001 can be used as a transformerless constant current LED driver circuit for illuminating a chain of many LED in series. The MBI6001 series of ICs are designed to work with mains AC inputs and convert it into a lower voltage DC output which may […]
Zero Crossing Transformerless Power Supply
The post explains the importance of a zero crossing detection in capacitive transformerless power supplies in order to make it completely safe from the mains switch ON inrush surge currents. The idea was proposed by Mr. Francis. Technical Specifications I have been reading about the transformer less power supply articles on your site with great […]
Voltage Stabilized Transformerless Power Supply
The post explains how an ordinary capacitive power supply may be transformed into a surge free voltage stabilized or variable voltage transformerless power supply applicable for almost all standard electronic loads and circuits. The idea was requested by Mr. Chandan Maity. Technical Specifications If you remember, I communicated you sometime before with comments at your […]
High Current Transformerless Power Supply Using Dimmer Switch
In this post we discuss an effective and efficient high current capacitive compact power supply using a dimmer switch gadget. In one of my other posts I discussed a high voltage transformerless power supply circuit that used a triac for controlling the capacitive output, however since the concept involved shorting the capacitive output by the […]
Switching Transformerless Power Supply using IC 555
A simple yet smart solution is implemented here using IC 555 in its monostable mode to control in rush surge in a transfomerless power supply via a zero crossing switching circuit concept, wherein the input power from the mains is allowed to enter the circuit only during the zero crossings of the AC signal, thereby eliminating the […]
Stabilized Transformerless Power Supply Circuit with Relay Driver Stage
In this post we discuss an enhanced transformerles power supply circuit design which consists a well stabilized and regulated DC stage along with a relay driver stage which operates through an external pulse. he idea was suggested by Mr. Reza. Technical Specifications Reza: Dear Sir, I have a problem with one Circuit regarding converting an […]
0-300V Adjustable Transformerless Power Supply
The post explains a simple transformerless zero to 300 volts variable voltage and current power supply circuit which can be used for many different applications. To protect against my higher voltage research projects from shooting up in smoke permanently, I developed an easy circuit which is able to render a variable voltage supply of 0 […]
Variable High Current Transformerless Power Supply
The following post discusses a simple transformerless power supply circuit whose output can be varied from zero to the maximum specified voltage level. The design also ensures the availability of relatively high currents, and protection against switch ON surge currents. (Designed by “Swagatam”). The Circuit Concept We have already seen quite a few transformerless power supply designs […]