Monthly Archives: October, 2007

More Hitachi LCDs With The PIC 16X84

In a previous post, I discussed how to use the Hitachi LCD’s four bit mode. However, sometimes you need to save a few more I/O lines so you might consider the circuit presented here In this case, a 74164 serial-to-parallel converter is used to hold the data to be sent to the LCD. Since only …

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Using Hitachi LCDs With The PIC 16X84

There are any number of sites out there that describe using LCDs based upon the Hitachi HD44780 with various microcontrollers. My intention is not to repeat what has been presented elsewhere, but to discuss the specific case of using these LCDs with the PIC 16X84 and to show the interface I currently use with them.Using …

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Oscilloscope Delayed Video Trigger

This circuit is intended for those people who want to work with analog video signals but aren’t fortunate enough to own an oscilloscope with a video trigger. It provides a trigger synchronized the video signal’s vertical sync pulse that can be used with any oscilloscope that has the capability of accepting an external trigger. As …

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