16f84 cd4511 decoder integrated circuit and timing controller based on the 7 segment LED display with display and buzzer sound can give warning adjustment is done with the buttons numbered 1,2,3 MPASM assembler source. Asm software available Darkroom timer... Electronics Projects, LED Display with PIC16F84 Adjustable Timer Circuit "microchip projects, microcontroller projects, pic assembly example, pic16f84 projects, " Date 2019/08/02