Electronics
Charging Lithium Cells with a Bench Power Supply
How to charge a lithium cell safely from a bench power supply: read the datasheet, set the voltage and current, and know when to stop.
Electronics
Components, circuits and the maths behind them, explained from the breadboard up.
Electronics
555 timer astable: flashing an LED on a breadboard
Wire a 555 timer in astable mode to flash an LED, with the frequency and duty cycle calculated for the parts used and a diagram to copy.
Electronics
Make a simple LED circuit on a breadboard. (Maths included)
Build a one-LED circuit on a breadboard and use Ohm's law to pick the right resistor, with the maths worked through step by step.
Electronics
Capacitors: What They Are and How They Work
What a capacitor is, how it stores energy, the main types and uses, and how to work out total capacitance in series and in parallel.
Electronics
What are resistors & how do they work?
What a resistor does, Ohm's law, colour codes and materials, with worked examples of a voltage divider and choosing a resistor for an LED.