- Wiring 240v sockets
- Video signal format explained
- Variable resistors or pots
- Television – solving TV reception problems
- Soldering technique
- SIMMs and other memory modules
- SCRs, Triacs and SSRs Resistors and capasitors data
- Relay driving basics
- LED and laser diods
- Magnetic materials
- Meter shants and multipliers
- Ohms law and power measurements
- Optocouplers – when and how to use
- them PCB – etching your own PC board
- Polyswitches and varistors
- Power adaptors or plug packs
- Power lock kits for cars
- IP rating Impendance matching
- Heatsink basics
- Fuses – a short primer
- Feedback understanding
- Earth loops and hum
- Decibels understanding
- DC-DC convertors for car amps
- DC-AC inverters
- Battery sealed lead-acid – using and charging
- Battery terms and what they mean
- CCD cameras – understanding and using
- Choosing a rechargeble battery
- Choosing a replacement transistor