Electrical Projects

Here you find a collections of some projects done during the years.

Be freely to copy any circuits and PCB:s, but remember I'm not taking any responsibility of the working and possible damaged due to these projects.

• NICD / NIMH charger based on MAX 713 / MAX 712

• Components
• Schematic in PS format
• Component layout in PS format
• PCB layer 1 in PS format

• Centronics to I2C converter inside DB25 connector

• Components
• Schematic in PS format
• Component layout for top layer in PS format
• Component layout for bottom layer in PS format
• Top PCB layer in PS format
• Bottom PCB layer in PS format
• One example of source code to control I2C

• 18W Stereo Audio Amplifier

Components

Schematic for 18W Audio amplifier in PS format

Component layout for top layer in PS format

Top PCB layer in PS format

Bottom PCB layer in PS format

• AP2000 Memory logic and 1750Hz tone for Amateur Radio use

Components

Schematic in PS format

Component layout for top layer in PS format

Top PCB layer in PS format

• Yaesu VX-1R PC interface inside DB25 connector

Components

Schematic in PS format

Component layout for top layer in PS format

Component layout for bottom layer in PS format

Top PCB layer in PS format

Bottom PCB layer in PS format

For more information visit Yaesu VX-1R Unofficial page

• Low cost 2m/70cm GP antenna

Original article from 73 Amateur Radio, April 1989

Sizes in mm

• Icom IC-R71E modification for DRM reception

Modification picture 1

Modification picture 2

Modification picture 3

Murata CFK455F datasheet (pdf)

455kHz to 12kHz converter

Screen dump from DRM software radio for DRM reception.

DRM software info

• Simple PIC16F84A based controller for Baycom inside the DB25 connector

Readme

PICBAY picture

Top side picture

Bottom side picture

Zipped file for HW and SW

• Interface for Trimble Lassen LP GPS module

Readme

First proto for ready to connection to Kenwood TH-D7.

Second proto in box.

Download software direct from Trimble.

Zipped file for HW.