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Rectifier Circuits

Rectifiers:  #'s - B      C - N      O - S      T - Z


Last Updated: December 07, 2017 02:04 PM
Circuits Designed by Dave Johnson, P.E. :

Rectifier-Fullwave -  I have used this handy circuit many times.  It accurately converts an AC signal into pulsing DC, which can be filtered to provide an average of the input voltage.  It works from millivolts to volts.  The circuit shown requires a stable +5v reference if a . . . Hobby Circuit designed by Dave Johnson P.E.-February, 2002

Reduce voltage to Photovoltaic Solar Panel with Ideal Diode -  Solar panels usually include a diode at their outputs.  The diode prevents current from back feeding into the panel at night from the battery being charged by the panel.  But, this diode does waste some power and does reduce the available panel voltage. . . Circuit by David Johnson P.E.-March, 2011

RF Signal Detector at 2.45GHz -  Many cordless telephones, computer networks and cell phones use a RF transmitter lefted on the 2.45GHz band.  Using a microwave diode detector and 100uA meter, this passive circuit will display the strength this signal.  The drawing shows how a bent piece of wire can be used as the antenna. . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2006

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Rechargeable CMOS Battery -  Occasionally we come across a computer motherboard that seems to eat those CR2032 batteries every 4 to 5 months.  This is particularly frustrating because the computer works perfectly once booted but all the important BiOS settings are lost when the CR2032 battery fails.  This is very irritating if the affected computer will not boot up with the default BiOS settings.  I recently had a computer motherboard with this same irritating phenomenon.  A test revealed that the current drain __ Designed by Radio Amateur Society of Norwich N1HFX

Rectifier tracks positive & negative peaks -  06/08/06 EDN Design Ideas:  Versatile precision rectifier also delivers full-wave output __ Circuit Design by Harry Bissell Jr

Rectifier-Fullwave -  i have used this handy circuit many times.  it accurately converts an AC signal into pulsing DC, which can be filtered to provide an average of the input voltage.  it works from millivolts to volts.  The circuit shown requires a stable +5v reference if a . . . Hobby Circuit designed by Dave Johnson P.E.-February, 2002

Reduce voltage to Photovoltaic Solar Panel with Ideal Diode -  Solar panels usually include a diode at their outputs.  The diode prevents current from back feeding into the panel at night from the battery being charged by the panel.  But, this diode does waste some power and does reduce the available panel voltage. . . Circuit by David Johnson P.E.-March, 2011

Regulated 12V 500mA power supply -  This circuit above uses a 13 volt zener diode, D2 which provides the voltage regulation. Aprroximately 0.7 Volts are dropped across the transistors b-e junction, leaving a higher current 12.3 Volt output supply. This circuit can supply loads of up to 500 mA. This circuit is also known as an amplified zener circuit __ Designed by Mick Devine

RF Signal Detector at 2.45GHz -  Many cordless telephones, computer networks and cell phones use a RF transmitter lefted on the 2.45GHz band.  Using a microwave diode detector and 100uA meter, this passive circuit will display the strength this signal.  The drawing shows how a bent piece of wire can be used as the antenna. . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2006

Running 12V Fan Directly on 220V AC -  This circuit idea is certainly not new, but when it comes to making a trade-of between using a small, short-circuit proof transformer or a capacitive voltage divider (directly from 230 V mains voltage) as the power supply for a fan, it can come in very handy.__ Learning Electronics

Safety Guard-Simple Circuit unit, Protects home appliances from voltage spikes -  Protect your home appliances from voltage spikes with this simple time delay circuit.  Whenever power to the appliances is switched on or resumes after mains failure, the oscillator starts oscillating and D5 blinks.  This continues for three minutes.  After that, Q14 output of IC CD4060 goes high to trigger the gate of the SCR through D4.  At this moment, the voltage is available at the cathode of the SCR, which energizes the relay coil to activate the appliance and D6 glows.  Switch SW1 is used for quick start without waiting for delay.__ Learning Electronics

Schmidt trigger -  Article is in Dutch __ Designed by Jan Hammer

Schmitt trigger adapts its own thresholds -  EDN Design Ideas:  03/16/2015    if you need to condition a widely-varying signal, a simple Schmitt won’t work, but this Di will __ Circuit Design by Anthony Smith

Schmitt Trigger: an unusual -  This is a Schmidt unlike any you have seen before.  it has some unusual properties - some of which are distinct advantages, some are disadvantages.  There is no 'best circuit' - different ways of doing a particular function have different uses.   __ Designed by Richard Torrens

SCR phase control yields solid-state switch -  03/15/01 EDN Design Ideas:  SCRs (silicon-controlled rectifiers]/ PDF contains multiple circuits scroll to find the one of interest, or thyristors, have higher current and voltage ratings, lower conduction losses, and more robustness than TRIACs.  For these reasons, SCRs are better suited to high-power applications __ Circuit Design by James Keith

SCR Voltage rectifier -  Though not as accurate as a linear or a high-frequency switching rectifier, an SCR voltage rectifier wastes little power and creates no RFi.   __ Designed by Andrew R. Morris

SCR-Controlled Eht Power Supply -  Presented here is an extra-high-tension (EHT) power supply capable of delivering variable DC voltage from about 100 V to 5 kV with load current up to 500 mA.  One way of...__ Electronics Projects for You

Self-powered Fast Battery-Tester -  This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters.  it has two ranges: when SW1 is set as shown in the circuit diagram, the device can test 3V to 15V batteries.  When SW1 is switched to the other position, only 1.5V cells can be tested. __ Contact IQ Technologies

Simple 0...24v/2A Power supply -  Ham Radio - Power Supplies __ Designed by Guy Roels ON6MU

Simple Circuit 3.3 volt power supply -  Among the power supplies presented here, this is a well regulated type that can deliver up to 1.5A current from a wide range of input voltage of 5V to 25V dc.  See LM317 calculator if you want to know how to get the 3.3 V output.   __ Designed by KB Kaminski

Simple Circuit Inverter -  This circuit will provide a fairly stable "Square Wave" Output Voltage.  Frequency of operation is Mainly determined by the 220 uF Feedback Caps.  Currently about 60 Hz.  Various "off the shelf" transformers can be used. __ Designed by G.L. Chemelec

Simple Circuit Switching Power Supply -  This is a Somewhat Experimental Circuit and I Especially designed this circuit for those persons that want to Dabble in Switching Power Supply Designs.


This Circuit is based on a UC3843 integrated Circuit.
it does Not allow for Feedback control of the output voltage.
 __ Designed by G.L. Chemelec

Simple Circuit switching power supply -  could a switcher be designed that would use parts available from ANY Radio Shack or well-stocked junk box? i'm happy to report the answer is YES!  __ Designed by Donald L Burdette

Simple Circuit switching rectifier (experimental) -  This is an experimental circuit which rapidly "chops" a steady DC input voltage to produce a lower output voltage. Regulation is a function of the chopping - It is caused by the output transistor switching on and off around the target voltage, which when smoothed provides a constant DC output.__ Rowan from Melbourne, Austrailia

Simple Constant Current Source -  This simple constant current source uses an LM317 rectifier IC .  N.  B.  The pin-outs of the IC are not a mistake, the output is taken from the adjustment pin.  I found this circuit to charge all my NIC ad batteries, and I use a Kambrook mechanical light-timer (or equiv.) for 110vac to time the charge __ Designed by John Nooyen

Simple Universal AC or DC Amplifier with Opa452/Opa453 & Transistors -  introduction During the experiments with loudspeakers, systems with loudspeakers, transformers, public announcement systems, audio distribution lines and amplifies, etc, we are in need of audio amplifier capable of providing more than 60Vpp...__ Electronics Projects for You

Single to 3-phase power conversion -  The single phase 220 VAC input is brought in on lines 1 and 2, labeled L1 and L2 in figure 1.  Time delay cartridge fuses are used for short circuit protection.1R-1 and 1R-2 are the main contacts for the magnetic contactor (power relay.) The coil for this relay is denoted 1R.  The run capacitors are wired between lines 1-3 and lines 2-3.  The overloads are part of a thermal overload relay with a normally closed contact labeled OL-1.  This contact will open if any overload is tripped.  Opening this contact disables the flow of current through the 120 VAC control circuit deenergizing the coil 1R.  The idler motor terminals are labeled T1, T2, and T3 __ Designed by John - K3PGP

Small 2.5-50V power supply for universal use based on a LT1074 -  This project describes a little power supply, based on a LT1074, adjusteable from 2.5 to 50 V, delivering much more than 1 Amp. __ Designed by Alexander C. Frank, aka Ajarn Changpuak

Small power supply for universal use based on an LM317 adjustable rectifier -  This project describes a little power supply, based on a LM317, adjusteable from 1.25 to 30 V, delivering approx.1 Amp.  Yet another nice to have building block :-)  __ Designed by Alexander C. Frank, aka Ajarn Changpuak

Small Variable power Supply -  Features: 1.3-12.2 V, 1 A, over-current protection.  This is a simple but reliable device based one of the oldest integrated voltage rectifiers of them all - the LM723.   __ Designed by Aaron Cake

Solar charger for lead-acid batteries. -  This circuit is still under development, but works well as shown.  This circuit is intended for charging lead-acid batteries with a solar panel.  The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination.  The charger will stop charging once a pre-set voltage (temperature compensated) has been reached, and recommence charging when the voltage has dropped off sufficiently.  The load is disconnected when the baterry voltage drops below 11V and reconnected when it gets back to 12.5V. __ Contact IQ Technologies

Solid State Relay -  Solid State Relays are available almost everywhere these days, however they remain very expensive.  Therefore, your efforts to build one yourself pays off.  Especially since it only needs a handful components and the circuitry is simple and straightforward __ Designed by Jan Hamer

Solid State Tesla Coil/High Voltage Generator -  This is a fun and useful circuit for demonstrating high frequency high voltage.  it can produce up to about 30KV, depending on the transformer used.  it is cheap and easy to make, thanks to the standard TV flyback transformer used.  it can power LASERS (although I have never tried) , demonstrate St.  Elmo's fire, and even cause a fluorescent bulb to light from as much as 2 feet away.   __ Designed by Aaron Cake

Solid-state voltage indicator with high voltage cutout -  Voltage fluctuations in the mains are very common phenomenon. These fluctuations can cause heavy damage to costly electronics and electrical gadgets operating for long period of time. For such purpose, an automatic stabilizer is used which is usually quite expensive.__ 

Stabilized Power Supply with Short Protection -  Here is an efficient 4-stage stabilized power supply unit for testing electronic circuits.  it provides well regulated and stabilized output, which is essential for most electronic circuits to give proper results.  The circuit provides an audio- visual indication if there is a short circuit in the PCB under test, so the power supply to the circuit ‘under test’ can be cut-off immediately to save the valuable components from damage.  __ 

Step Down a Negative Voltage Without using an Inductor -  When you need to step down a negative voltage in a lowcurrent application, a non-inductor configuration offers two advantages: ease of use and a low number of external components.  Such step-down converters can be implemented __ Designed by Budge Ing and Ben Wolde

Step Down Rectifier Makes a Simple Circuit DC Power Supply -  04/09/98 EDN-Design Feature (Several circuits included.  Scrol to find this one) A simple and useful nonisolated rectifier features voltage step-down operation, acceptable Class A line-current harmonics, inherent short-circuit protection, and, optionally __ Circuit Design by Nathan O Sokal, Design Automation Inc, K Kit Sum, Consultant, and David C Hamill, Surrey Space Centre

Student DC Power Supply -  Build a simple DC supply having three output terminals: regulated +5VDC, unregulated +10VDC and 7.5VAC.  The supply is suitable for microcontroller experimenting.   __ Designed by Wichit Sirichote

Supply uses AC to generate 5V, power-on reset -  05/16/02 EDN Design Ideas:  The need often arises for a low-cost logic supply for powering microcontrollers and related circuitry in "white-goods" products, such as industrial controllers and sensors.  These applications usually include 24 or 115V ac or higher levels of ac voltage for conversion to 3.3 or 5V dc.  The simplest approach to generating low-current logic-supply levels is to apply the rectified and filtered ac in __ Circuit Design by Greg Sutterlin, Maxim Integrated Products, Sunnyvale, CA

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Rectifiers:  #'s - B      C - N      O - S      T - Z


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