Last week I was browsing my old backup hard drive and I found a source code for a very simple PIC based digital timer that I made a couple of years ago. The actual hardware of the project isn’t with me anymore. I might have lost it when I moved from my old apartment into […]
00 to 99 minute timer using PIC16F628A microcontroller Read More »
This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units such as comparators and current mirrors that make it work. The popular 555 timer integrated circuit is said to be the world’s best-selling integrated circuit with billions sold since it was designed
Reverse engineering the popular 555 timer chip (CMOS version) Read More »
Keypads are a very commonly used input device in microcontroller-based systems. In a keypad, multiple switches are arranged in rows and columns so that they could be interfaced to a microcontroller with a minimum number of I/O pins. For example, a 12-key keypad is arranged in a 4×3 format, which allows to interface the 12
2-Wire Keypad Interface Using a 555 Timer using PIC16F628A Read More »
If you’ve played around with electronic circuits, you probably know[1] the 555 timer integrated circuit, said to be the world’s best-selling integrated circuit with billions sold. Designed by analog IC wizard Hans Camenzind[2] in 1970, the 555 has been called one of the greatest chips of all time with whole books devoted to 555 timer
555 timer teardown: inside the world’s most popular IC Read More »
Welcome back everybody! This video covers multitasking via timers and interrupts with the PIC 18F4550. A few notes on this video: -To keep the pace of the video going I added fast forwarding more than in the previous videos. Please let me know in the comments if this was helpful or better compared to the
PIC 18F4550 Timer And Interrupt Example Video Project Read More »
Description This software functions as a long period astable mutivibrator. The mark and space period can be set from 1 second up to a maximum 65535 seconds (18h12m15s). Using the internal 4Mhz RC oscillator delays with an accuracy of 99% or better can be achieved The code also implements an edge triggered reset and an
Long Period Astable Timer using PIC12F629 Read More »
2 Digit Count Down Timer is a utility Count Down timer project for upto 99 seconds of countdown time. This project can find many uses in your shack and home. The relay output remains on during the Count Down period, allowing you to interface load or alarm that you want to keep it on for
2 Digit 99 Seconds Timer Read More »
Hi Friends, I hope everyone had a rocking New year I was suppose to give you all a New year gift uploading a new project, but unfortunately it got delayed ‘coz I was busy with my *personal life* One of our site member, Jeswanth kumar (jeswanthmg ) has submitted his project to me just before
PIC Industrial and Domestic Timer (Relay Controller) Read More »
Here is 0 to 99 minutes relay timer using PIC16F628 microcontroller and 16 character LCD display. The microcontroller is PIC16F628A running at 4.0 MHz clock using an external crystal. An HD44780 based 16×2 character LCD is the main display unit of the project where you can watch and set the timer duration using tact switch
Relay Timer with PIC16F628 Read More »
// Generator frequency 100 Hz with Timer0 For Pic16f877 // //#include “D:\MICRO_PICC_Group\timer\timer_0\timer_0_100hz.h” #include <16F877.h> #device adc=8 #FUSES NOWDT,XT //No Watch Dog Timer #use delay(clock=4000000) int1 time; #int_RTCC void RTCC_isr(void) { output_toggle(pin_b0); /* time =!time; if(time==1){ output_high(pin_b0); } if(time==0){ output_low(pin_b0); }*/ set_timer0(236); } void main() { setup_adc_ports(NO_ANALOGS); setup_adc(ADC_OFF); setup_psp(PSP_DISABLED); setup_spi(SPI_SS_DISABLED); setup_timer_0(RTCC_INTERNAL|RTCC_DIV_256); setup_timer_1(T1_DISABLED); setup_timer_2(T2_DISABLED,0,1); enable_interrupts(INT_RTCC); enable_interrupts(GLOBAL);
Timer 0 mode timer For CSS Compiler Read More »
