An open source universal audio amplifier called ‘U-AMP‘ @ GmanModz, that is available on GitHub: Using what I learned getting digital audio working on each systems, I set out on a new project I would call “U-AMP” (Universal-Amp). This would be ONE pcb which has the features of seamlessly integrated speakers and headphones with a […]
Category Archives: PIC
Open source Bluetooth stack for PIC32/24
Nigan tipped us to a simple open source Bluetooth stack for embedded devices, the SmallTooth: A newly developed open source Bluetooth stack for PIC32/24 * The code is really easy to understand, very well documented and really small. * Designed to be extended and ported. * Works straight out of the box with the PIC32 […]
USB Morse keyer
Dilshan Jayakody writes about a new open source project, the PIC16F886 based CW auto key controller with USB support: USB Morse Keyer is a microcontroller-based auto keyer project with following features: *USB / straight key / iambic key inputs *Support for both standalone and USB operating modes *64-character USB typeahead buffer and 6-character Morse key typeahead buffer […]
PIC16F1459 USB stack light controller
Glen Akins published a new build: After using the PIC16F1459 to build numerous USB HID input devices including a giant keyboard, a tiny keyboard, and a big red button, it was time to see if the PIC16F1459 could be used to control outputs too. Sticking with the industrial theme, I chose to build a USB […]
RTC based automatic LED lamp
Dilshan Jayakody published a new build: This is real-time clock based automatic LED lamp which we originally designed to use as night light. This lamp can programmed to turn on and off at the specific time of the day. For example, it can program to turn on at 6 PM on each day and to […]
USB Mass storage device bootloader
MPPT Solar charger’s USB mass storage device bootloader project from Soldernerd, that is available on GitHub. Check out the video after the break.
A simple 8-channel receiver voting controller for enhanced repeater coverage and usability
KA7OEI has written an article detailing a simple 8-channel receiver voting controller: To simplify things, this voting controller sits in “front” of an ordinary repeater controller, taking the audio and COS inputs from the various receivers and outputting a single audio and COS signal. If the repeater system in question uses subaudible tones, it is […]
Mostly PIC16C57
CAPS0ff team posted an article taking a closer look at 8 “PIC16C57s”: We were recently sent 8 “PIC16C57s” from: *High Seas Havoc (403/C013) *Wargods (U69, C020) *MACE (U96, C021) *Carnevil (U96, C022) *BioFreaks (C023) *Gauntlet Dark Legacy (C024) *Gauntlet (U37, C025) *Blitz 99 (U96, C026) More details at CAPS0ff blog.
6 channel speaker selector
Dilshan Jayakody published a new build: If you are an audio enthusiast and if you have multiple audio systems and speakers, you may definitely need to have a speaker selector switch. These switches allow you to route a audio signal through a switching system and distribute it to various speakers. Using this listener can select […]
Building a giant USB three key mechanical keyboard
Glen Akins shares his latest build the giant three key USB keyboard: After seeing this giant mechanical keyboard at Adafruit, I decided I had to build my own. Adafruit made theirs out of wood and used one of their Python-compatible microcontroller boards. I wanted a sloped top on my keyboard. I also wanted to check […]
PIC18 four-channel DMX relay controller
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 come with timer remotes.) My […]
PICKit 3 Mini
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 use the newer 3.3V PIC32 […]
RX/TX sequencer
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 sensitive low-noise pre-amplifier (LNA) is used. […]
Beacon Keyer
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 was in 2013. A beacon […]
CO2, temperature and humidity monitor
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 and status, a warning alarm […]
Portable temperature, humidity and light ambient datalogger
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 to have maximum autonomy with […]
TV Tuner IR remote with a PIC16F684
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. In order to power the […]
Programmable relay switch using PIC MCU (revised version)
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 which the timer stops automatically) […]
Designing a mains frequency monitor
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 that it adds. Be sure […]
Development board for PIC16F1938
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 board for this MCU and […]