Terminal Learning Objective
- Describe how logic ICs can be used in an electrical circuit of an IED
Enabling Objectives
- Identify the pin configuration of a logic chip
- Explain the use of a truth table
- Identify schematic symbols for logic gates
- Identify logic gate IC pinouts
Lessons
Digital Logic Lecture
RC Timer and LDR Armed Pressure Plate
Lab Overview This circuit utilizes a quad AND gate IC to allow for three separate events that can occur in any order to fire the detonator. The circuit uses an RCTIMER, and normally open switch (pressure plate) to feed into a second AND gate with an LDR. The RC TIMER must be above the threshold […]
RC Timer Armed Touch Release
Lab Overview This circuit contains two circuits within it. VR1, C1, SW1, R4, Q1, R1, and LED2 make up the arming circuit. In contrast, S/A1, R2, LED1, Q2, and the touch switch with R3 as a pull-up resistor on the Gate of Q2 make up the firing circuit. Tools / Parts / Test Equipment Soldering […]
Logic Gate Collar Bomb
Lab Overview This circuit is designed to be used in a Category A Scenario for Hand Entry training. It uses a series of logic gates for two pressure release switches. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
URDU Dark Switch
Lab Overview The circuit is armed via an RC Timer and fired through a decrease in light intensity. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
URDU Wire Disconnect Booby Trap
Lab Overview This is a quad Nor gate IC Chip that is stable until a break wire trigger is broken. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
URDU Water Level Switch Dribble Timer
Lab Overview This derivative of the dribble timer uses a quad NOR gate IC chip that uses only three of the NOR gates to function. The circuit is stable until the water level has dropped enough that one of the immersed wires is no longer in the water. When the wire is no longer immersed, […]
URDU NOR Light Variable Reset
Lab Overview A Quad NOR gate IC is used to ensure the RC Timer has elapsed before the LDR can trigger an SCR to fire a detonator. This alternate version includes a variable resistor to fine tune the timing of the RC Timer circuit. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder […]
