Reader Questions Answered Here (02.2014)
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February 2014
Inquiries about trickle chargers, ham mobile radio setups, and electronic player pianos are asked and answered this time.
Reader Questions Answered Here (01.2014)
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January 2014
Questions on LED drivers, remote control, and video and power over cable are answered.
Reader Questions Answered Here 12.2013
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December 2013
Bandpass filters, 12 volt control, and NiCad battery chargers are asked about and answered this time.
Reader Questions Answered Here (11.2013)
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November 2013
A Jacob’s ladder redux, a video monitor alarm, and robot communication issues are discussed this time.
Reader Questions Answered Here (10.2013)
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October 2013
A Tesla coil project, an infrared pulse amplifier, a mini LTspice tutorial, a backup camera mod, some newbie questions, and MailBag round out this month’s coverage.
Reader Questions Answered Here
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September 2013
ESD instrument circuits, more about making sparks, VFO design, and MailBag round out this month’s topics.
Reader Questions Answered Here
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August 2013
An ampere-hour meter, a cat alarm, and a two-way intercom are discussed.
Reader Questions Answered Here
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June 2013
IR sensors, batteries, electric fence indicators, datasheet errors, dial lamp modifications, garage door lights, intercom systems, DC-to-DC regulators, and high voltage regulators are discussed.
Reader Questions Answered Here
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May 2013
Questions on a synthesis circuit, IC chips, grounding problems, resistor values (for light/dark), power supplies, and Kodak photoresist and developer are answered.
Reader Questions Answered Here
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April 2013
Topics include a pet trainer, bandpass filters, a push on/push off circuit, a DC servo, a voltage reducer, plus Mailbag.
Reader Questions Answered Here
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March 2013
Solar power for microcontrollers, touch switches, tuned circuit values, remote tester problems, and a tutorial on transistor modeling are covered this month.
Reader Questions Answered Here
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February 2013
Topics include a switch contact rating, a paddle key project, a negative voltage converter, making circuit boards, and a NiMH battery charger.
Reader Questions Answered Here
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January 2013
Questions about a voltage converter, a trigger LED from a distributor, and a bench top power supply are answered, plus a digital pressure gauge is revisited this time around.
Reader Questions Answered Here
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December 2012
Burned parts on a weed whip charger, a wireless listening device, and a model train speed controller are some of the topics covered this month.
Reader Questions Answered Here
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November 2012
Answers to questions on a pet-safe invisible fence and a solar phone battery charger, just to name a few.
Reader Questions Answered Here
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October 2012
Topics this time include an extra loud car turn signal, a regenerative shortwave radio, and a stethoscope amplifier, just to name a few.
Reader Questions Answered Here
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September 2012
A driveway system hack, fan speed control, and an LED array driver are some of the topics discussed this time.
Reader Questions Answered Here
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August 2012
Send all questions and comments to: [email protected]
Answers to Questions
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July 2012
Send all questions and comments to: [email protected]
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April 2012
Get answers about LED flasher circuits, lighthouse lamps, PCMCIA memory cards, and multi-station intercoms.
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March 2012
Some of the topics covered this month include a water level monitor, radio repair, and a phototransistor amplifier.
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February 2012
Help with a random number generator, battery tester, LED dimmer, and a nonsense circuit are just some of the topics covered in this month’s column.
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January 2012
Questions on flickering lamp circuits, water softeners, and USB testers are just some of the things talked about this time.
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December 2011
Learn about a deer repellant circuit, a sine wave modulator, IR remote control, plus a lot of other stuff people have questions about.
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November 2011
Some of the answers this month deal with a high power LED flasher, a solar controller, an LED flashlight, and a Lithium-Ion battery charger to name a few
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October 2011
Get answers about gel cell charging voltages, a VFD filament driver, relay logic, and more.
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September 2011
Get answers to a solar controller, 1.5V hobby motor speed controller, a DSL carrier detector, and some other stuff.
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August 2011
Zeners at high frequency, an LED flasher circuit, and a refrigerator door alarm are covered this month.
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April 2011
A battery charge limiter, SPICE modeling, and a 433 MHz transmitter are some of the things you’ll learn about this time.
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March 2011
This month’s questions include how to set up a custom website, a circuit for pulsating LEDs, a car finder, plus a turn signal reminder, just to name a few.
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February 2011
This month’s questions revisit the CAT 5 cable tester and cover a 400 Hz gyro drive, analog isolation techniques, and an LED chaser circuit, just to name a few.
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January 2011
This month’ questions cover a CAT 5 cable tester, a model railroad sequencer, a low battery circuit, and an LED replacement for incandescent lamps.
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December 2010
Lightning protection circuit, fan control, op-amp tester, plus more.
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November 2010
Attic fan control, seven-segment LED help, a timer project, plus more.
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October 2010
High voltage sine wave, obscure battery, black body heat source, plus more.
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September 2010
Hum detection, Video buffer, LCD backlight, game clock, plus more.
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August 2010
Irrigation timer, video switch, plus the MailBag.
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April 2010
A cheap strobe, thermometer repair, re-using old transformers, solar light, plus more.
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March 2010
A doorbell light, soldering iron timer, revisiting the countdown timer and large clock, plus more.
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February 2010
A Count down timer, large clock, plus more.
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January 2010
Neon lamps and LEDS, generator voltage regulator, PC board current capacity, plus more.
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December 2009
Wind chime light show, DC-to-DC converter, bug zapper, plus more.
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November 2009
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist. Feel free to participate with your questions, comments, or suggestions. Send all questions and comments to: [email protected]
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October 2009
Game show lockout circuit, fluorescent ballast, PICAXE or PIC, plus more.
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September 2009
Solar panel voltage regulator, op-amps and diodes, current sensing motor control, plus more.
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August 2009
Audio comb filter, high current/low voltage amp, time delay circuit, plus more.
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April 2009
Softening up a table saw, returning light to Christmas, high voltage generation, plus more.
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March 2009
Measuring energy use, more on oscillators, flat panel TVs, plus more.
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February 2009
CO2 laser power supply, a cycling circuit, LED replacement of incandescent bulbs, more.
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January 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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February 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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March 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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April 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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August 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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September 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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October 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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November 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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December 2008
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
Questions & Answers
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January 2009
High impedance preamp, audio to LED display driver, FM shutdown problem, and more.
Introduction To Filters
November 2005
This article will be limited to analog filters built with discrete components. Filters can also be made using digital signal processing (DSP) and analog distributed components (transmission lines and resonant cavities).
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August 2007
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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September 2007
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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October 2007
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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November 2007
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
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December 2007
In this column, I answer questions about all aspects of electronics, including computer hardware, software, circuits, electronic theory, troubleshooting, and anything else of interest to the hobbyist.
