- SMD soldering station
- Active 3-way loudspeaker - 1
- Four-fold digital-to-analogue converter
- VHF-low converter
- Figuring it out (7):
MORE DUALS - Audible transistor tester
- Virtual ground
- State of battery indicator
- Two-way indicator light
- Copying in MS-DOS with one drive
- Light switch for motorcycles
- Voice-operated recording
- Telephone-operated night light
- Sequential touch switch
- Automatic power-off
- Audible tester
- I²C tip
- Single-chip temperature control
- Extended PC drive LED
- Ferguson BSB receiver as D2MAC decoder
- Fog light switching
- General-purpose digital tester
- Low-noise microphone amplifier
- Speed-chess clock
- DC-DC converter
- Joystick converter for PCs
- General transformer PCB
- DC motor regulator
- Multifunction test probe
- Infra-red AF transmitter
- Infra-red AF receiver
- Triangular signal generator
- Regulator output delay
- Fast high-power zener diode
- Matrix keypad encoder
- Class A preamplifier
- Zener bridge
- I²C bus fuse
- SCSI active termination
- Fourth-order single-chip filter
- Halogen light switch
- General-purpose Schmitt trigger
- Interior light switch for cars
- Fast active rectifier
- Car battery voltage monitors
- Speed indicator for PCs
- Continuity tester
- Audible continuity tester
- Multi-purpose display decoder
- Multiphase rectangular wave generator
- Electronic fuse
- Logic level tester
- Active bass correction
- UHF remote control receiver
- UHF remote control transmitter
- Lead-acid battery charger
- EMC testing of PMR equipment
- Maxi micro clock
- Camcorder audio mixer
- Make your own PCBs
- The analogue subsystem - 1:
HOMING IN ON THE NON-DIGITAL SIDE OF COMPUTER BASED ELECTRONIC INSTRUMENTS - IR receiver/demodulator SFH505A
- Active probe
- Plant humidity monitor