Digital Circuits – delabs

Digital Circuits – delabs

These circuits are based on CD40xx Chips and other. You can use 74HCT or any other series that is available. use one family for a particular project. These were used nearly two decades ago. Use it for learning, glue logic or to interface your uC designs to external devices. Do not make only Logic based designs like some below. It would be better to use a uC, CPLD or FPGA if you are building a complex gadget.Basic Digital Circuits

Digital Timers, Counters and Clocks

• Sequential Timer CD40xx
• Sequential Timer 7217
• Six Digit preset counter CD4518
• Analog timer CD4541
• Quad Presettable Timers
• Digital Comparator 74HC85
• Sequential Timer/counter 7217 with RAM
• CD4060 and CD4020 based long duration timer.
• Digital Timer Clock With Preset using Thumbwheel switch.
• 1 Hz or 1 pps crystal clock using CD4060 and 32768 Hz Crystal

Mixed and Interface Circuits

• Optical Proximity Switch
• Profile Controller
• Toaster timer 555
• Quad analog input switch logic
• Optical switch for water tap using LM555 and LM567
• Diff input DS8830 to TTL convertor
• Phase lock loop using 4046
• Am hour meter for battery chargers or electroplating equipment. 74C926

Digital Resources

• The Logical Story at Play Hookey
• Digital Electronics by Graham Knott
• Logic Gates – Electronics Club
• Digital Electronic Circuits
• Digital / Logic Electronic Circuits
• Digital Logic williamson-labs.com
• Logic Design – Leroy’s Engineering Web Site
• 40MHz Frequency Counter Module
• Sam Electronic Circuits – Datasheets
• PWM with MC14093 Schmitt Trigger NAND
• 16 Stage Bi-Directional LED Sequencer