Our new home has an interior 700L water tank with an electric pump supplying pressure to the house. Unfortunately, at times of peak demand, the external water supply pressure can drop so that the water tank is not refilling. This usually happens on a Sunday when we are in the middle of weekly laundry, car […]
Water Tank Level Alarm & Pump Cutoff (ESP8266 & MicroPython) Read More »
In myteenage years, about 40 years ago, I created a dual linear power supply. I got the schematic diagram from a magazine called ‘Elektuur’, nowadays called ‘Elektor’ in The Netherlands. This power supply used one potentiometer for the voltage adjustment and one for the current adjustment. After many years these potentiometers did not function correctly
Digital Controlled Linear Power Supply Read More »
What a “0–5 V” module really outputs A pedal sensor sold as 0–5 V output is usually a ratiometric linear Hall IC, sometimes with an op-amp. The Honeywell SS495A runs from 4.5 V to 10.5 V, idles at 2.50 V ±0.075 V, gives 3.125 mV/G ±0.125 mV/G over a ±600 G minimum linear range, and
0 TO 5V OUTPUT ANALOG HALL SENSOR FOR FOOT CONTROLLER Read More »
A flatbed scan of a connector gives a scaled silhouette, not a verified footprint. The method only becomes trustworthy when scale calibration, pad geometry, orientation and a one-to-one fit check are handled as separate steps.
Building KiCad Footprints from Scans of Undocumented Connectors Read More »
Almost all electronics have some sort of human interface, from blinking lights and beeping speakers to seven segment alphanumeric and Liquid Crystal Displays. This Instructable is about salvaging and testing Liquid Crystal Displays, and a couple tricks I know to make salvaging them more successful. I salvage; components can get expensive, LCDs can run $10.00 and up
Salvaging Liquid Crystal Displays (LCDs) Read More »
A growing branch of robotics research is the study of swarm organization, emergent behavior and artificial intelligence through the use of autonomous robotic agents. In this Instructable, I’m going to walk you through a one week project that I created as part of my Masters Architecture studies at theCalifornia College of Arts in collaboration with Prerna
BristleSwarm: Explorations into Swarm Robotics Read More »
What a “PICkit 3 clone” is, and is not There are two different things people mean by this phrase, and confusing them wastes a lot of time. A PICkit 2 clone. The PICkit 2 design was published: schematic and firmware are available, and the firmware runs on a PIC18F2550 with a 20 MHz crystal, talking
Making A Pickit 3 Clone Read More »
72 channels Serial (SPI) to parallel driver board has been designed for various applications. This project can be used as multi Solenoid driver, large size 7 segment display driver, bar graph driver, and LED driver. The project works with 5V logic levels. Output load supply 12V-48V DC and each output can drive 500mA load. I
72 Channels Serial To Parallel Driver Board Using 74HC595 & ULN2803 Read More »
There is no need for a wordy introduction to I2C protocol. We all know it’s main parts – 2 wires, multiple slaves, sometimes multiple masters, up to 5MHz of speed. Often so have we all implemented an I2C connection. Still, every now and then, there’s that module that just won’t work. This time, we will do
I2C – Everything you need to know Read More »
Working with microcontrollers means managing GPIO pins at some point. Many configurations have been developed for modern microcontrollers which can lead to some “fancy” terms that may confuse programmers. Its important to understand all of this to avoid confusion and errors while programming. First, some terms need to be understood. GPIO pins have tri-state logic
An introduction to GPIO Settings Read More »
