make simple logic circuit design projects
#logic gates
#breadboard
#TTL
#CMOS
#Boolean algebra
#truth table
#AND gate
#OR gate
#NOT gate
#XOR gate
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4093 Cmos Vfo Circuit
Two gates of a Quad 4093 are utilized in an astable multivibrator configuration. CI is a three-gang 365 pF variable capacitor with its sections connected in parallel. Additionally, S3 and S4 serve to switch in optional extra capacitors.
The described circuit...
Two Interlocked Toggle Switches - Cmos 4013
This versatile circuit offers a selection of different switching modes. It can function as two entirely separate toggle switches, with each push button successively energizing and de-energizing its corresponding relay. Alternatively, the two switches can be interconnected with diodes to...
Optical-cmos-coupler
Standard CMOS logic operates with supply voltages as low as 3 V and is specified for a maximum current sinking/sourcing capability of 30 pA. To drive the infrared emitting diode (IRED) when utilizing CMOS to control an optocoupler, it is...
CMOS Combination lock
This Electronic Lock circuit is not only simple but it is also very good. It can easily be configured to provide either momentary or continuous output. Key sequences of up to 9 digits are possible. You can pre-enter part of...
electrical engineering logic gates
Design a circuit with four single-bit inputs X, Y, T, and Z, and a single-bit output E. A two-bit control code word S0S1 determines which of the four inputs is sent to the output (the selection code is not unique)....
ttl power supply with crowbar protection
Power supplies designed for use with TTL logic circuitry must protect against over-voltage, which can rapidly damage TTL chips. The duration of over-voltage that can harm TTL chips is too short to activate any conventional fuse, necessitating the use of...
Cmos touch switch
This touch switch does not rely on mains hum for switching; it can be used with battery-powered circuits. The Schmitt trigger IC1 forms a 100 kHz oscillator, and IC2a, which is biased into the linear region, amplifies the output and...
Repeating Interval Timer 2
This is a simpler repeating timer circuit. It uses just one CMOS IC wired as an asymmetric oscillator. The length of time the relay remains energized and the length of time it remains de-energized are set independently.
The repeating timer circuit...
Cmos line receiver
The trip point is set halfway between the supplies by R1 and R2; R3 provides over 200 mV of hysteresis to increase noise immunity. The maximum frequency of operation is about 300 kHz. If response to TTL levels is desired,...