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Archive for the ‘PIC’ Category

PIC18 four-channel DMX relay controller

Thursday, October 26th, 2017

Glen Akins has a nice build log on his four channel DMX-controlled relay, that is available on GitHub:  Halloween was right around the corner and I needed a timer with a bunch of relays to trigger some store-bought props and a fog machine periodically. (Mental note: read fog machine specs carefully—not all...

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PICKit 3 Mini

Tuesday, October 10th, 2017

Reviahh has published a new build, the PICKit 3 Mini: Previously, I made a Pickit 3 clone – (see previous blog post). It works well, but I have often wondered just how little of its circuitry was needed to program and debug the boards I make. For instance – I primarily...

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Posted in PCBs, PIC | 5 Comments »

RX/TX sequencer

Wednesday, May 17th, 2017

Lukas Fässler has designed and built an RX/TX sequencer based on a PIC16F18325,  that is available on github: Much like the beacon keyer presented here earlier, this RX/TX sequencer is a simple but useful little device. Its typical use is in ham radio applications when a separate power amplifier (PA) and/or a...

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Posted in digital radio data, PIC | No Comments »

Beacon Keyer

Thursday, April 27th, 2017

Lukas Fässler from Soldernerd published a project writeup showing how he built a PIC-based beacon keyer: This is likely the first ham radio related project that I document here on this blog But my very first PIC project was a beacon keyer that I made for my father, HB9BBD. That...

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Posted in DIY, PIC | 1 Comment »

CO2, temperature and humidity monitor

Tuesday, September 13th, 2016

An open source CO2 monitoring project from Roving Dynamics: The project described below uses a MH-Z16 or MH-Z19 CO2 sensor and a DHT-22 (or DHT-11 if less accuracy is required) to measure the Temperature and Humidity. It has a 4 line by 20 character LCD Display to show the current readings...

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Posted in PIC, sensors | No Comments »

Portable temperature, humidity and light ambient datalogger

Friday, September 2nd, 2016

A battery-powered small datalogger based on a PIC18F2620 microcontroller project from Jesus Echavarria: The idea comes a few months ago, talking with a friend. He needs something to  monitoring temperature and humidity inside a sea container, for a three weeks travel from Spain to China. Low consumption is important, in order...

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TV Tuner IR remote with a PIC16F684

Friday, July 22nd, 2016

Tahmid built a TV tuner IR remote with a PIC16F684: I then proceeded to write an IR transmitter using the PIC16F684 (using the MPLAB X IDE and XC8 compiler), following the timing information from the extended NEC protocol. In order to connect all the keys, I connected them in matrix keypad form....

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Posted in infrared, PIC | 1 Comment »

Programmable relay switch using PIC MCU (revised version)

Thursday, June 30th, 2016

Raj has documented his DIY programmable relay switch using PIC16F1847 microcontroller: Here are the summary of the features that this programmable relay switch has: On-board +5V voltage regulator (operates at 9-15V DC input) OFF and ON time setup for the relay operation Option for cyclic run (maximum 100 cycles, after...

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Posted in PIC | 4 Comments »

Designing a mains frequency monitor

Monday, June 20th, 2016

Dan Watson writes: This is the second in a series of posts about designing a mains frequency monitor using the Microchip PIC 16F1619 microcontroller. In this post we will take a look at the first revision of the board that I designed for the project and some of the features...

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Development board for PIC16F1938

Monday, May 23rd, 2016

Raj over at Embedded Lab has designed a development board for PIC16F1938: The PIC16F1938 is a versatile 28-pin MCU belonging to Microchip’s extreme low power microcontroller family featuring nanoWatt XLP technology, 28KB of programming memory, 1KB of RAM, 11 ADC channels, and tons of other peripherals. A while ago, I designed a development...

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Posted in PIC | 1 Comment »

Get ready for MPLAB Express, throw away your Arduino

Wednesday, April 6th, 2016

Chas from iradan.com writes: I credit the maker movement with bringing electronics back from the crusty old and lonely electronics hobby back into the main stream. The Arduino is the micro of choice for this army of makers and I conceded it made sense… you install the IDE, plugged in your...

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Posted in PIC | 17 Comments »

Automatic monitor brightness controller

Monday, April 4th, 2016

Dilshan Jayakody writes: This is an automatic "monitor brightness controller" based on environmental light conditions. This system use USB port base sensor unit to measure the light level and control monitor brightness accordingly. We design this system to reduce the eye stress by matching the monitor brightness with environmental lighting....

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Posted in DIY, PIC, USB | 1 Comment »

PIC32 Tic-Tac-Toe: Demonstration of using touch-screen, TFT and the Protothreads threading library

Monday, August 3rd, 2015

Tahmid writes: I had previously used the Adafruit TFT display using my library (ported from the Adafruit Arduino library). I decided to optimize the library to improve drawing speed. The same display I use comes with a 4-wire resistive touch-screen as well. I decided to write a simple library for...

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Designing a PIC24 development board

Wednesday, July 8th, 2015

Brian Dorey has designed and built a PIC24 development board, that is available at GitHub: One problem we found was trying to prototype code using this microcontroller as unlike Arduino and any ARM microcontrollers there isn’t a small easy to use prototyping board available for the PIC24 chip.  Microchip make an...

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Ben Heck’s DIY PIC32 Dev board

Thursday, May 14th, 2015

In this video Ben Heck of Element14 demonstrates how he build his own PIC32 development board.

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Posted in DIY, PIC | 4 Comments »

Obstacle sensing walking stick for visually impaired persons

Wednesday, April 8th, 2015

Avinash Gupta wrote an article detailing his smart walking stick project for visually impaired persons This project is designed to guide a visually impaired person to walk and avoid bumping into obstacles. Low cost ultrasonic rangefinders along with a microcontroller is used to measure the distance to obstacles and if they are...

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Posted in PIC, sensors | No Comments »

Open source binary wristwatch

Tuesday, March 10th, 2015

Jordan aka njneer made this cool binary watch project, that is available at Github: I’m pretty proud of this project; the clasp is a ribbon cable that doubles as the programming interface for the PIC microcontroller that drives everything. The time is displayed with superbright LEDs that are blinding at 15 mA, which...

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Posted in clock, open source, PIC | 2 Comments »

Stand-alone inductance meter update

Friday, February 13th, 2015

An update on Lukas' stand-alone inductance meter project we covered previously: From a high-level point of view the new software is very similar to the Arduino sketch I wrote for the Inductance Meter Shield. If you look a bit closer, you’ll notice some differences for several reasons: This project uses an entirely different microcontroller:...

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Posted in measurement, PIC | 1 Comment »

Temperature controller for K-type thermocouple and MAX6675

Monday, February 9th, 2015

Chris Holden of Nerd Club has written an article on their DIY temperature controller with a simple menu system: After what seems to have been a very long time, it was nice to poke more wires into a breadboard and make something actually useful for a while! Here's a simple temperature monitor...

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Posted in DIY, PIC | 4 Comments »

Digital data capture unit with EMF reader

Monday, February 9th, 2015

Dilshan Jayakody writes: This is PIC16F73 base digital data capture unit with optional EMF reader. This data capture utility is design to work with most of the analog sensor inputs and by default it is equipped with EMF reader module. This unit use PIC16F73's internal 8bit ADC to capture the...

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Posted in PIC | No Comments »

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