CREATE AN EEPROM PROGRAMMER USING THE PARALLAX PROPELLER MICROCONTROLLER
Create an EEPROM programmer using the Parallax Propeller Microcontroller. Overview and download the SPIN code.
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Philip Lett
- Aug 31, 2021
- 1 min
CREATE A CPU FROM SCRATCH, PART II - REGISTERS
Here's Part 2 of the video series on creating a CPU from scratch. In Part 1 I described the outline of the basic CPU and demonstrated...
284 views0 comments
Philip Lett
- Aug 31, 2021
- 1 min
BUILD A LOW COST SHOP AIR FILTER
I have a basement shop and even with dust collection, you are still left with less than stellar air quality. Since my joists are open, I...
45 views0 comments
Philip Lett
- Apr 12, 2021
- 8 min
LEARN ELECTRONICS - DIODES
INTRODUCTION The basic function of a diode is to conduct very well in one direction and very poorly in the other. When optimized to turn...
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Philip Lett
- Apr 6, 2021
- 5 min
LED BASICS AND HOW TO USE THEM
Never worked with LED's before? Then this article will help demystify those little glowing colors so you can use them too!
24 views0 comments
Philip Lett
- Mar 9, 2021
- 3 min
IMPROVING USB TO SERIAL INTERFACE TO THE PARALLAX PROPELLER IC
The Parallax Propeller microcontroller is one of my favorites albeit a little pricy these days. I love it for its ease of programming...
39 views0 comments
Philip Lett
- Jan 1, 2021
- 4 min
HOW DO CAPACITORS WORK IN DC CIRCUITS - COFFEE BREAK
This is a first in a series of short articles describing some aspect of electronics. The first being how capacitors act in a DC...
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Philip Lett
- Dec 29, 2020
- 1 min
ARE BREADBOARD POWER SUPPLIES FROM CHINA WORTH IT?
Recently I picked up a few breadboard power supply boards and decided to do a review of them. You can check out the YouTube video but in...
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Philip Lett
- Oct 10, 2020
- 4 min
BUILD A KNIGHT RIDER LARSON SCANNER
I was shooting the breeze one day about the good old days with some friends of mine, and we were reminiscing about our car days. Back...
270 views1 comment
Philip Lett
- Sep 22, 2020
- 4 min
DESIGNING A 35MM LENS USING ONLY OFF THE SHELF OPTICS
Having spent many years in the optics industry, I had always been curious if it was possible to design a usable 35mm camera lens using...
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Philip Lett
- Sep 20, 2020
- 4 min
HOW TO INTERFACE THE ECG FRONT END WITH A PIC12F1822 AND 128x32 GRAPHIC DISPLAY
This is the first of a two part series on using the ECG Front End in your own applications. In this part, we will explore a standalone...
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Philip Lett
- Sep 5, 2020
- 3 min
HOW DO YOU ACCESS SPI ON A RASPBERRY PI?
This article aims to show a simple method of setting up the SPI interface on the Raspberry Pi Computer with Python. The SPI interface is...
317 views1 comment
Philip Lett
- Sep 3, 2020
- 1 min
HOW TO MAKE YOUR OWN JUMPER WIRES
If you've spent any time shopping the hobby market at all, you'veĀ probably seen jumper kits for sale. These are convenient, and low...
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Philip Lett
- Aug 21, 2020
- 2 min
HOW DO YOU INTERFACE A 10 BIT ADC TO THE FT2232 USB TO SERIAL CONVERTER?
Reading an analog signal into a pc can be accomplished many ways these days. Here I show how to use an FT2232 interface to read from a...
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Philip Lett
- Aug 21, 2020
- 3 min
HOW TO TURN BI-POLAR INTO UNI-POLAR FOR ANALOG to DIGITAL CONVERSION
In today's microcontroller market, most of the Analog to Digital converters are only able to accept voltages from the Vcc of the device...
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Philip Lett
- Aug 21, 2020
- 2 min
HOW TO CREATE A PRECISION TRIM POT VOLTAGE DIVIDER
Finding the right resistor combination to create a specific voltage range can be cumbersome. This short article aims to show you how to...
167 views0 comments
Philip Lett
- Aug 21, 2020
- 4 min
UNDERSTANDING POWER AND HEATSINKS PART II - REAL WORLD EXAMPLES
Heat in electronics is inevitable but improper management of heat can be catastrophic. See a real world application and actual...
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Philip Lett
- Aug 18, 2020
- 4 min
UNDERSTANDING POWER AND HEATSINKS PART I - THEORY
Heat in electronics is inevitable but improper management of heat can be catastrophic. Learn about how manage heat in your next project....
34 views0 comments
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