Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Checking Switches

CHECKING SWITCHES
In a circuit diagram, a switch is shown in the idle state.

1. Normally open or normally closed switch
Switches are classified into those which open the circuit and those which close the circuit when off.

Switches are shown in their normal state unless specified otherwise.

2. Switch connection
This figure illustrates a complex switch. The continuity between terminals at each position is as indicated in the table.