TechDesign Electronics: DIY Projects

• Small electronic compass.
• Dimensions: 45x36x15mm.
• Suited for robotics and other various applications.
• Low current LED indicator (stays lit when heading North) for power saving.
• Accuracy 1...2° @ 7Hz measurement..
• Easy calibration.
• Serial RS232 readout possible.
• One multifunction push button for power on and calibration.

• Low power operation with one small +12V MN21 battery.
• Power supply input range is +3.0V ... +12V, only 2...5 mA active, 190µA when sleeping.
• Auto sleep mode after 30 seconds (LED goes off.)
• Runs on a PIC18F25K20 at 8 MhZ along with an HMC5883 sensor.

• Assembled and fully tested TD-CMP v2Compass now available.
• Project source code and schematics can be purchased separately.

 

• Adds movement detection and visual effects to enhance visibility to motorists.
• 3 LEDs flash simultanuously in normal mode.
• Various light effects when a small movement or direction change is detected.
• All 3 LEDs light up for 1,5 sec when braking occurs.

• Low power operation with two AAA (HR3) 1V2 Ni-Mh or regular 1V5 batteries.
• Power input range is +2.0V ... +3.6V, 15 mA flashing, 25 mA braking (all LEDs ON) and only 3µA when OFF.
• Runs on a PIC18F25K20 at 8 MhZ.
• ON/OFF button (short press.)
• Available as front/white or back/red light.

• Assembled and fully tested Bike LED Light now available.
• Project source code and schematics can be purchased separately.

 

• Stereo FM band receiver with RDS decoding for mobile applications.
• Continuous full RDS data output through RS232: RDS PS, PI, TA/TP/TMC, CT, TMC.
• Full Radio Text supported: 2x64 characters.
• Raw TMC data output.

• Low power operation with two AA (HR6) 1V2 Ni-Mh batteries or power supply.
• Power input range is +2.4V ... +3.0V, 50..60mA without OLED and 80..90mA with OLED.
• Runs on a PIC18F46K20 at 16 MhZ.
• Full user control (volume, tune, save preset) with a 5-way micro joystick.
• Module works as stand-alone without OLED as well.
• Optional OLED Module 1 with RGB OLED 96x64 pixels shows PS (station name), frequency, TA/TP/TMC, PI, mono/stereo, RT (2 alternating lines of radio text)
• Serial interface control so the player may be used as a playback module.
• Analog line stereo output.
• Antenna connection, suggest use of a 30cm -> 2m wire.

• Assembled and fully tested KIT1 now available.
• Project source code can be purchased separately.

 

The EchoMp3 is a small Audio player. It's of excellent quality. And it uses normal SDHC cards up to 16 GB. Mp3, Wav, Ogg-Vorbis, Wma and Mid formats are supported.

Powered by two AA (HR6) 1V2 batteries. Runs on a PIC18F46K20 at 64 MhZ.

Up to 320 kBps bitrate VBR and CBR at 44,1 kHz.  ID3 v2.3 tags supported. Directory and file fragmentation support.

Serial Interface control.

Full user control (volume, track, pause, skip, directory, shuffle) with a micro joystick.

Real Time display of bitrate, sampling rate, elapsed time, songnumber, ...

Assembled KIT2 and KIT3 versions available.

KIT1 DIY step-by-step construction guide: now available.

Schematic & pcb (Eagle 4.11e), hex file available. C source code (CCS) licenses can be purchased. Player software updated on Feb 12, 2011.

Database and invoicing software.

Encrypt and backup/restore your important data.

• Fast customer/product/invoicing processing.
• Create an Invoice/Proforma/Credit Note/Order/Send Note pdf and direct print.
• Multiple currencies: EUR, USD, GBP, YEN and others
• 11 document database tables (see screenshot on the left.)
• Secure 256 bit AES encryption for text, double encryption for ZIP-email.
• Encrypted content is hidden directly. Simple selection-click to decrypt.
• Quick encrypted email-backup.
• Multilingual application: English/Deutsch/Français/Nederlands/Español/Italiano.
• Compatible with Windows XP/Vista/7.

Free download and 30 day trial.

The EchoMp3 is a  small MP3 player. It's cheap and of excellent quality. And it uses normal SD(HC) and MMC cards up to 4 GB.

Powered by a single AAA (HR03) 1V2 battery. Runs on a 18LF452 or 18LF458 at 20 MhZ.

Up to 256 kBps bitrate at 44,1 kHz supported. VBR may peak at 320 kBps. ID3 v2.3 tags supported.

Directory and file fragmentation support. Shuffle (random play) and extended character set enabled.

New: Serial Interface control.

Full user control (volume, track, pause, skip, directory, shuffle) with a micro joystick.

LCD contrast adjustable.

Real Time display of bitrate, sampling rate, elapsed time, songnumber, ...

KIT versions available + step-by-step construction guide.

Schematic & pcb (Eagle 4.11e), hex file available. C source code (CCS) licenses can be purchased. Player software updated on November 24, 2009.

Discontinued as of Feb.2011. Check out our new EchoMp3 v3.1 instead.

TD-CMP01 (Compass only), TD-CMP02 (Compass and Tilt/Roll) and TD-CMP03 (Compass, Tilt/Roll and Temperature)

These are small modules with a Compass, Tilt/Roll (2-axis Acceleration) and Temperature sensors.

Interfaces are USB, RS232 and I²C. Direct LCD readout optional.

USB Windows application available (WinXP or Vista.) Source code (CCS c and c# .NET 2003)  can be purchased.

You may also purchase the bare pcb, and a KIT DIY* version. View step-by-step construction guide.

New: compass calibration.

Schematics and pcb diagrams available for download. Last update: November 26, 2009.

 TD-USB-01: USB Mouse Interface

This is an example USB project showing how to interface an optical mouse sensor (the ADNS-2620) with a standard XP/Vista computer.

The TD-USB-01 board with a PIC18F2550 communicates with:

• the PC: USB 2.0 through a mini-B connector.
• the mouse sensor board: SPI over 4-wire flatcable.

Free schematics and sensor source code available for downloading.

Project updated: March 28, 2009.