2x10W stereo amp Tiny and low-cost stereo amplifier circuit built around a TDA2009A
as a weekend project.
Perfect to listen to music using some speakers from an old hifi system..
H field meter A simple circuit measuring the voltage inducted in an exploring coil by varying magnetic fields. The voltage is indicated on a LED bar driven by a LM3915. The circuit as
well as the board layout originate from ELV journal 3/97.
PIC-Board Very simple board with a PIC16F84 microcontroller. The I/O ports
are lead through to two connectors. In-circuit programming is possible using a third connector. The PIC was programmed using a low cost programmer and
the PicProg software which can be found on the picprog-Website.
Additionally, a 5x7 LED matrix was built from 3mm LEDs which can be controlled
by the PIC using a 4017 counter.
Tiny and low-cost stereo amplifier circuit built around a TDA2009A
as a weekend project.
Perfect to listen to music using some speakers from an old hifi system..
A simple circuit measuring the voltage inducted in an exploring coil by varying magnetic fields. The voltage is indicated on a LED bar driven by a LM3915. The circuit as
well as the board layout originate from ELV journal 3/97.
Very simple board with a PIC16F84 microcontroller. The I/O ports
are lead through to two connectors. In-circuit programming is possible using a third connector. The PIC was programmed using a low cost programmer and
the PicProg software which can be found on the