PIC Development Boards PIC16F84 PIC16F873

A PCB with firmware to exploit and test all the functions in this PIC microcontroller. The board features a LCD, keyboard, piezo sounder, Real Time Clock with backup power, I2C bus, potmeter for A/D conversion and more. I use Shane Tolmie’s exellent PIC Bootloader solution to download software into the microcontroller. PIC Development Boards PCB

PIC16F873 Development Board

A simple demo and development board for the PIC 16C84 and 16F84. It features a keyboard and a 4-digit LED display. The demo software feature a clock with calculator. I didn’t make the PCB and thus only have a schematic for the board.

PIC16F84 Development Board

Project list

40Mhz garage door opener V2

This time a new and revised design featuring the 16F630 and a 10-key DIP switch to set the code. A new HF output choke to save space. Schematic PCB All files included. Protel files

Wideband FM radio transmitter

Very small (SMD) wireless microphone FM broadband transmitter. Range 10-20 meters, 88-108 Mhz. Based on an app note from Maxim. Also, note that Maxim provides sample ICs for free.

40 Mhz garage door opener version 1

PIC based 40Mhz garage door transmitter. My first self-made HF circuit and in use every day! It emulates the function of ready 12 code switch devices. The code is replaced with a serial PC connection and a terminal emulator. Many thanks to Maxit for all his help in the HF department.

A simple PIC based device for simple programming of the above garage door opener. Just enter the code, connect the serial port to the transmitter and press the Program key. A very simple design made to work with garage door opener v1.3 or newer. The zip file also contains several front foil designs.

It’s mostly an R2 unit built from the ground up that doesn’t completely work in my living room. It’s sad but true, I never had time to finish it.
There are several onboard systems, an 80535 microcontroller, ISD based audio unit, LCD, keypad, lights and a few RC servos for motion. He now has a younger brother, I bought him at a SciFi store in Paris.

Porsche 993 LED upgrade

After installing the HIDs, I wanted whiter tail lights. See this post on the PCN Forum and there is an english version here on Rennlist.

spider robot

I bought an obstacle avoiding spider-like robot (MOVIT SPIDER III) and decided to make a PIC 16C84 based board to give it some more intelligence in its behavior. The board has a built-in piezo sounder and motor driver circuit with PWM. I’m afraid I never had time to finish it.

My first telephone exchange

In 5th or 6th grade, my friend Tom and I ran hundreds of meters of cable and used old radios as intercom amplifiers. We soon expanded this to our other friends, extended a few kilometers of cable and started using old phones for intercom units. The following year, I built a small ten-user switchboard and enabled the use of decimal phones. Big thanks to Dad and Halvor Øvringmo at HIN for all their help during these early years. (1983)

CLIP tester

A nifty little gadget I made in 1997. Connect in parallel to the analog telephone line and simulate the Caller Line Identification Presentation signal. I used this circuit to test CLIP equipment even before service providers made analog CLIP service available. The CLIP implementation in Norway is even a 1200 baud FSK signal sent in Hi-Z mode (on-hook). The signal is sent between the first and second ring signal. The circuit includes an XR2206 FSK modulator and a PIC 16C84 microcontroller.

Also, a smooth tuning function is included in the software to be able to tune the two FSK tones on the XR2206. I used the RTCC on the PIC to count the frequency, just adjust it until the LED lights up.

I made the PCB in OrCAD back in those days and unfortunately I don’t have the PCB files for this project. The C code could do with some cleaning, especially in the checksum calculation functions, but it works and I wasn’t a particularly skilled programmer at the time.

HTC – Autocom interface

A small schematic for the wiring between the Autocom motorcycle intercom and an HTC PDA phone with ExtUSB port. I’m using HTC 3600 on my bike and running TomTom navigation software. The circuit charges the HTC as well as feeds the stereo sound to the driver headset. I can use a Bluetooth-based solution but this must be an A2DP device to be able to hear any TomTom instructions.

sci-fi robot

It’s a little Star Wars-like robot made in 2000 made from an old IKEA lamp, some old RAM circuitry, and black spray paint. Our little friend is rolling on the ground with IR sensors, trying to avoid obstacles and constantly making noise. A rare breed, funny acting Imperial droid!
Electronics: The drivetrain is two modified RC servos with large rubber wheels. (only motor and gears are used) Impact and microphone sensors. Two ISD2560 sound chips for many sounds. A PIC16C84 controls them all using a bit-multiplying I2C bus. TCA3727 motor driver.
This was a great platform to try out a real-time, event-driven behavioral program that combines motion and sound.
Pictures and files coming soon!

Source: privat.bluezone.no PIC Development Boards PCB schematic alternative link: