Logic ProbeCircuit Tradeofic
No description available.
Audible Logic Probe Circuit Schematic
The NE556 timer can function as an indicator for the static state of a digital logic audible terminal. An audible logic probe is beneficial for visually inspecting a component while simultaneously checking the logic state at another point far from...
CMOS Toggle Flip Flop Using Laser Pointer
The circuit described operates similarly to a previous design but utilizes a laser pointer to activate the relay instead of a push button. An IR photo transistor (model Q1, Radio Shack 276-145A or equivalent) is connected to the set input...
TTL Three - State Logic Probe PCB
A TTL logic probe is an essential tool for troubleshooting digital circuits. Various methods can be utilized to design a logic probe. The most common designs incorporate operational amplifiers, logic gates (OR, NOT, XOR), and transistors. The circuit described here...
Touch delay switch a circuit diagram of a NAND gate consisting
The touch delay switch, as illustrated in the figure, is composed of a CMOS NAND gate and is capable of providing a delay of approximately 10 seconds. It is commonly utilized for the automatic control of lighting in street corridors...
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....
Morse Keyer Redesign and Rebuild
Two inexpensive CMOS integrated circuits and a few transistors were sufficient to convert an old TTL automatic Morse keyer into a low-current, lightweight, battery-powered iambic Morse keyer. Over the last couple of years, the aging Accu-Keyer ceased functioning. This device...
Wilf Rigter`s SIMD1 V1
Normally the active high output from the inverter is used to enable the remainder of the CMOS gates which then perform some useful function. When the SIMD1 triggers at night, it snaps on and the output signal can be used...
A Dozen Small Cmos Alarm Circuits
A selection of small self-contained CMOS alarm circuits is presented. The main features of each alarm are indicated on the circuit diagram itself. All circuits exhibit a very low standby current, making them suitable for battery operation. Each pair of...
Flip-Flop Using CMOS NAND Gates
Using just two NAND or inverter gates, it is possible to build a D-type (or toggle) flip-flop with a push-button input. At power-up, the output of gate N2 is at a logical 1, ensuring that transistor T2 is switched off....