Description This is a basic 9v to 5v PSU using a 7805 regulator, this was a common circuit to build for building a low cost 5v stabilised DC supply using…

Description A simple book light Schematic Bill of materials QTY PART-REFS VALUE CODE — ——— —– —- Resistors ——— 1 R1 150K 1 R2 120R 2 R3,R4 100K Capacitors ———-…

This is a basic DC power supply using the 78XX voltage regulator. Schematic Parts List QTY PART-REFS VALUE — ——— —– Capacitors ———- 1 C1 1000uF 1 C2 100uF Integrated…

This is the most basic example of using a LM317 voltage regulator. The variable resistor (R1) and R2 are used to select the output voltage. The Lm317 is capable of…

Description A simple LED flasher using a 555 timer Schematic Bill of materials Resistors ——— 2 R1,R3 1k 1 R2 470k Capacitors ———- 1 C1 1uf Integrated Circuits ——————- 1…

There are 5 basic digital gates used to perform Logic Operation and these are called a Buffer, NOT, AND, OR, XOR Basic Logic Gates Symbol Mathmatical Formula Truth Table Buffer…

All surface mount resistors have a 3-digit or 4-digit code. Here is a picture of a 3-digit surface mount resistor   The first and second figures indicate the significant figures…