digital counter unit
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Pulse DemodulatorCircuit
The Pulse Demodulator, as illustrated in the accompanying image, consists of a CMOS Hex Inverter. This circuit is capable of performing envelope detection on amplitude pulses.
The Pulse Demodulator utilizing a CMOS Hex Inverter is designed to extract the envelope of...
Simple Quiz Display
A simple quiz display is constructed using two TTL ICs: the 7445 and the 7420. It indicates which switch is pressed first, accompanied by a circuit diagram. This project represents an interesting and verified game concept.
The circuit utilizes the TTL...
Removing pop from a CMOS switch
A simple audio switching circuit is experiencing issues. The circuit utilizes a CD40106 Schmitt Trigger in conjunction with a CD4066 CMOS switch to route audio signals.
The circuit design incorporates a CD40106 Schmitt Trigger, which is essential for providing clean signal...
Cmos Pair 2-Mhz Crystal Oscillator
This circuit is a 2 MHz crystal oscillator utilizing a CMOS transistor pair. It is particularly suitable for applications in digital watches and clocks due to its low power consumption. The oscillator is constructed by connecting a CMOS transistor pair...
Power Supply for TTL
In the circuit shown below, if the voltage at the output terminals rises above 6.2V, zener conducts charging capacitor C4. This voltage will fire the silicon-controlled rectifier (SCR), which quickly shorts across the supply rails blowing the fuse. The regulator...
Logic adjustable Glow-Plug drive
All of my turbine starts before the research on the ECU involved a very successful spark ignition. I thought (only briefly) of trying to add spark ignition to the ECU, but the mixture of delicate logic circuitry and perhaps 30,000V...
cmos based vehicle anti theft alarm
This car alarm circuit includes Exit and Entry delays, an instant alarm zone, an intermittent siren output, and an automatic reset function. By incorporating external relays, it is possible to immobilize the vehicle and activate the lights.
The car alarm circuit...
two cmos based 24 hour timers
A pair of multi-range timers capable of timing periods up to 24 hours and beyond. Both versions are fundamentally similar, with the primary distinction being that Version 1 energizes the relay when the time expires, while Version 2 de-energizes it....
Using C-MOS light emitting diode drive circuit NAND gate pulse
The 4000 Series 4011B is a NAND gate used in conjunction with a 4AI NAND gate circuit group to create two loops of an unstable multivibrator. The first NAND gate and the second NAND gate operate at approximately 1 kHz,...