Ramsey UT5 Manual de usuario descargar pdf (Pagina 3)

UT5 - 3

THE 555 IC ITSELF:

The "555 timer chip," as it's popularly known among electronics hobbyists, packs over 40 parts, including 23

transistors, into its 8-pin package. It may be operated in either of two "modes" and the UT5 PC board is designed to

permit easy set-up of either mode:

Mono-Stable ("one shot") Mode: In this mode, the 555 awaits a command pulse to start a timing cycle which may be

any length you choose from miiliseconds to hours, depending on the value calculated for C1 and the setting of R3.

Astable Mode: This mode is most easily understood as "Oscillator Mode," which includes pulse generation, logic

clocks, LED flashing, as well as audio tone generation.

KIT ASSEMBLY PROCEDURE:

The UT5 is assembled and completed in three phases:

Phase 1: Soldering 555 IC and parts common to all circuits.

Phase 2: Planning and installing Timing and Mode components.

Phase 3: Planning and installing specific project connections.

The installation of the parts on the PC board does not take long and is not difficult. However, proper soldering and

correct selection of components is as important for this simple circuit as it is for our most complex kits.

First, check your parts against the Kit Parts List on the following page:

1 2 3 4 5 6 7 8 ... 17 18

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Ramsey UT5 Manual de usuario Pagina 3