T&L Publications

When troubleshhoting the 413 MHz transmitter/receiver remote control you have to first verify that the transmitter is operating. You need to examine the modulation input terminal of the Linx transmitting module with an oscilloscope to verify that the pulse train is present. Once so verified, a simpl...

Thanks for the informaion about KPR. I did have a question which was where I could purchase this material, which you answered. I use KPR to make small runs of PC boards, but it is getting very expensive.
AJC

Does anyone here use Kodak Photo Resist, which is known as KPR, for making small quantities of printed circuit boards?

The best way to reduce 6 volts to 3 volts is to use a switching regulator such as Linear Technology part number LT1616. There are dozens of chips like this available from Linear Technology, Maxim, and other manufacturers. Data sheets are available from their websites, and include schematic diagrams....

It's too bad that magaznes such as Popular Electronics and Modern Electronics went out of business. They were great. I wish they would come back.

Does anyone know of a source of positive acting liquid photoresist that can be used to sensitize a piece of copper clad? I want to make printed circuit boards using an ultraviolet light source and an artwork. Once so exposed and developed, the copper clad can then be etched in ferric chloride or oth...

Check the April 2002 issue of Nuts and Volts. There is a remote control system that you can build.

My easy-to-build remote control article was published in the April 2002 issue of Nuts and Volts. It consists of a small transmitter and receiver that operates at 416 MHZ. The RF sections of the circuits are ready-made low cost modules. The receiver contains a relay that can be used to operate any ot...

I am using Windows 98. I went to another computer with Windows 98 and this one had winzip, so I could unzip the file. When I displayed the PCB layout I was able to print it out. Unfortunately it printed only half size, so it is useless to make a PC board using that artwork.

I downloaed a zip file from the NV website. Now how can I display the PCB artwork on my computer? Do I need to buy software for this?

The July 2000 issue of Nuts and Volts carried my construction article using a MAX038 chip as a low cost function generator. PC boards are still available.

In the July 1996 issue of Popular Electronics Magazine (remember that?) there is my article on how to add daytime running lights to a vehicle. It is a simple circuit using a user variable 555 oscillator that allows the duty cycle fed to the headlights to be set anywhere from 10% to 50%. The 555 chip...