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555: Data Sheet

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Data sheet for the 7805 (LM7805), a compact IC 5v DC voltage regulator integrated circuit. This page further describes the 7805 and provides Datasheets for the IC device.
Datasheet and PDF Data sheet for the TL494 Pulse Width Modulation (PWM) Control Circuit.
Photo: Temperature data logger, multi channel Temperature data logger, multi channel
PC controlled 4 channel temperature meter
Photo: Outgoing Phone Number Logger Kit Outgoing Phone Number Logger Kit
Recorder all outgoing dialed numbers on your phone with this electronic kit.
An electronic circuit that uses a 556 (Dual timer) IC to produce a two-tone train horn sound effect. Equivalent circuit using two 555 timers (single timers) is given.