Terminal Learning Objective
- Students will be able to explain how transistors are used in the electrical circuit of an IED
Enabling Objectives
- Identify the schematic symbol of a transistor
- Identify the legs of a transistor
- Describe the function of a transistor
- Determine how transistors are configured in an IED ci30
Lessons
Transistors Lecture
NPN Light Sensor
Lab Overview This circuit uses the output from an LDR to trigger an NPN Transistor (Q1) to drive a Relay (RY1) and fire a single detonator. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
PNP Dark Sensor
Lab Overview / PNP Dark Sensor This circuit uses the output from an LDR to trigger a PNP Transistor (Q1) to drive a Relay (RY1) and fire a single detonator. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
TIP122 Radio Squelch
Lab Overview This circuit uses the output from a modified FRS radio to trigger a darlington pair (Q1) to fire a single detonator. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
URDU Watch Timer 2 Simplified
Lab Overview This is essentially the same as URDU Watch Timer 2 except for the removal of the arming circuit. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
URDU Watch Timer 2
Lab Overview This circuit uses a network of transistors with an RC Timer to arm. Then it will wait for the small signal from a Casio Wrist Watch timer to fire. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
Collar Bomb Transistor
Lab Overview This circuit is designed to be used in a Category A Scenario for Hand Entry training. It has two firing circuits; a Casio watch acts as a timer and a break wire as an anti-tamper victim-operated switch. The title suggests use as a victim collar bomb, but it can be used in a […]
URDU Transistor Battery Disconnect
Lab Overview This circuit functions the same as the typical collapsing circuit that would use two batteries and a relay, except here, we replace the relay with a capacitor and an NPN Transistor (Q2, C1). When B2 is removed, the circuit collapses and fires a detonator. Tools / Parts / Test Equipment Soldering Iron Helping […]
URDU Touchpad
Lab Overview This circuit is similar to the URDU Touch Switch but removes the screw terminal and replaces it with a cut trace touch pad that can be used for table top demonstration and intricate pressure plates. Tools / Parts / Test Equipment Soldering Iron Helping Hands Solder Multimeter
