About the article

All-Soft-555

ATtiny plays 555 MMV and AMV

All-Soft-555
The chip with three fives in its type code sure is among the biggest selling ICs of all times but from today’s perspective the internal block diagram certainly looks a little dated with its multitude of analogue signal paths. In this article we give the design a 21st Century makeover to produce a much more versatile ‘virtual 555’ using an 8-pin microcontroller.
Downloading of this magazine article is reserved for Elektor Members only.
Already a member? click here to log in.
Products
Extra info, Update
Features
MMV (iMono) features
Digital, configurable monostable multivibrator
Three modes: non retriggerable, retriggerable and extended pulse
Programmable trigger edge: falling or rising
Non inverting and inverting outputs
Pulse width from 0.8 µs to 524 s
Documented source code in BASIC
AMV (iMulti) features
Digital, configurable astable multivibrator
Four modes: Fast, Fixed value, VCO and VCDC
Gate input defined in software either active High or Low
Waveform true or inverted
Frequency adjustable by software or control voltage
Duty-Cycle adjustable by software or control voltage
Frequency range 10 MHz to 1.91 MHz
Documented source code in BASIC

Loading comments...