Hardware

Audio
- USB dongle with PCM2912 September 19 2011
- USB soundcard with PCM2902 May 31 2010
- Building of LeachAmp 200W amplifier May 15 2006 (Update February 2 2007, August 19 2009, March 4 2010)
- USB audio DAC with PCM2902 May 13 2007 (Update August 6 2008)
- SPDIF audio DAC with CS8416 and TDA1543 December 1 2008 (Update January 25 2009)
- Clipping indicator October 14 2009
- USB audio DAC with PCM2704 October 16 2009 (Update November 29 2009)
- Modular audio DAC
  - DIR9001 S/PDIF decoder January 8 2010 (Update March 8 2010, June 25 2010, February 26 2011, March 29 2011)
  - DAC with TDA1543 January 8 2010
  - DAC with ten TDA1543 circuits January 29 2010 (Update March 29 2011)
  - DAC with PCM1794A February 28 2010
  - DAC with AD1865 May 18 2010
  - CS8416 S/PDIF decoder September 27 2010 (Update February 26 2011, March 29 2011)
  - AD1865 DAC with I2S input and voltage output February 13 2011
  - USB DAC with PCM2706 and I2S output April 6 2011
  - I2S bus isolator board April 7 2011
  - DAC with two PCM1704 circuits December 26 2011
  - DAC with WM8740 March 25 2012
  - Talema 10VA transformer board September 16 2012
- ALPS potentiometer board March 30 2011
- Stereo width controller April 6 2012
- TPA6120 headphone amplifier June 30 2012 [NEW]
- Guitar control March 18 2013 [NEW]
- Wireless digital audio May 2 2013 [NEW]
Amiga
Computer fans
- 4-Wire fans April 22 2007 (Update October 13 2008)
Infrared
- IrDA transceiver for desktop PC (Update 6.4.2003)
- RONJA - optical datalink 20.7.2001
Compact fluorescent lamps
- Description, schematics and photos of lamps - (Update October 13 2008, March 24 2010, October 22 2010, March 5 2012)
Other
- Decoration light June 28 2010
- SCSI connectors
- Adaptor for Casio diary
- Parallel laplink cable
- Line circuit of SupraFaxmodem336E 21.9.1999
- Cable for a KODAK DC240 digital camera 27.1.2000
Power supplies
- 200W PC ATX 22.10.1998 (Update 6.6.2003)
- Secondary supply of ATX MXR-250P 6.6.2003
- Dual power supply April 6 2012