Integrated Circuits

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Terminal Learning Objective

  • Generalize how integrated circuits are used in the electrical circuit of an IED

Enabling Objectives

  • Recognize an IC in a radiograph
  • Identify the pin configuration of an IC chip
  • DIP vs SMD
  • State the purposes of a 555 timer in an IED
  • Understand 555 datasheet (pinout and pin descriptions)
  • Identify 555 monostable vs astable
  • OP-AMPS as comparators

Lessons

Monostable 555 Timer

Author: Site Admin

Lab Overview This circuit uses the output from a modified digital kitchen timer and a normally open switch to arm and fire the circuit, respectively. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter

One Zone Alarm

Author: Site Admin

Lab Overview This circuit utilizes a Quad Comparator OP-AMP IC as a window comparator to test an end of line resistor’s Voltage against two reference voltages, one high reference, and one low reference. When the Voltage at the zone reads outside the window, the circuit utilizes a P Channel MOSFET to fire a single detonator. […]

Two Zone Alarm

Author: Site Admin

Lab Overview Arming: SPST switch broken out to screw clampsFiring: Two EOL CircuitsFiring Switch: P-Channel MOSFET Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter

555 Decade Counter A

Author: Site Admin

Lab Overview This circuit utilizes a 555 Timer and 4017 Decade Counter to make a delayed firing type device. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter

555 Decade Counter B

Author: Site Admin

Lab Overview This circuit utilizes a 555 Timer and 4017 Decade Counter to make a delayed firing type device. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter

Monostable 555 Variable Timer

Author: Site Admin

Lab Overview This circuit uses the IC Chip, 555, as a timer that is automatically activated when power is provided. Upon completion of the timer, the 555 uses a P channel MOSFET (Q1) to fire a single detonator. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter

URDU NOR Light Switch

Author: Site Admin

Lab Overview A NOR LOGIC GATE IC is used to ensure an RC timer AND an LDR have reached a threshold before triggering an SCR to fire a Detonator. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter

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