RS232 Connection Notes See the RS232 reference to determine the wiring for either a 9-way or 25-way female D Type “sub-miniature” connector. RTS and CTS are connected together. RXD is used to steal a negative supply. You may have to connect DSR and DCD to DTR if you are using the Arbiter hardware with other software. […]
On this page I hope to provide more details than I usually provide for those who wish to construct their own PIC-bot, realising that people actually try to make this stuff. Traditionally, my ‘bot pages are for documenting the essentials, not in the kind of detail needed to make as if it were a kit.
18 pin PIC Development Board I have long been playing with Microchip PICs but have always made do without some form of development board. To that end I have designed a basic board that I was hoping to get some input for. I haven’t yet made this board as I am waiting for some kit
Now the PCB kit I used described how I could draw my circuit layouts directly unto the copper clad board using an special pen with etch-resistant ink, however lacking the dexterity of an artist I chose to get myself some CAD software for generating PCB layouts. After a bit of research I decided to go
The device used for measuring daily insolation has been developed. The device was built with a PIC18F458 and the 128MB Multimedia Memory Card, MMC. The solar radiation is measured by a calculator solar cell. The PIC chip interfaces the MMC using SPI mode. The interval between samples is set to one minute. The firmware detects
overview There are three PIC source versions: PB12 is for 12-bit slave devices without interrupt PBUS is for slave devices with an interrupt, software UART implementation PB628 is for slave devices with an intterupt and a free hardware UART PBUS assigns a unique device ID in the range 1-f for every controller on the bus.
PBUS – an RS485-like multi-drop bus with half duplex serial protocol Read More »
Guys, in this step by step instruction, I wanna share my private experiment with PIC16F877A and assembly language, I call it Build yourself flashing message on PIC16F877A with assembler Let’s prepare the parts Step 1: The parts needed for this experiment 1. PIC 16F877A chip 2. The board for PIC 16F877A 3. LCD 16×2 4.
Build yourself flashing message on PIC16F877A with assembler Read More »
Intro: Chronograph for Air Cannon This chronograph project consists of a sensor assembly and timer circuit box that can be used to measure the muzzle velocity of a projectile fired from an air cannon. I originally built this setup for use with a large air cannon with a 3″ bore. The sensor assembly is attached
Chronograph for Air Cannon using PIC16F628A microcontroller Read More »
Background Most multimeters can measure frequency, but they are not sensitive and the max frequency is not always so high. The same problem can be found with older frequency counters. This project will describe a prescaler which will work up to 2.5GHz and with very high input sensitivity. The prescaler will divide the input frequency
Poor man’s counter using PIC16F84 microcontroller Read More »
The Talking Breathalyzer Mark II Hi Folks! Thanks for having a gander! This is my second Breathalyzer project. IT TALKS TO YOU, and gives you an idea of how much you’ve had to drink! I made it specifically for for this contest. I hope you all like it. From a block diagram point of view,
The Talking Breathalyzer Mark II using PIC18F1220 Read More »
