DIY
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Andonstar AD407 microscope add-ons, part 2: Base, PSU and LED dimmer
Extending the base platform. Making a custom PSU and LED dimmer. Continue reading
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Andonstar AD407 microscope add-ons, part 1: extender and LED ring
Some of the drawbacks of this microscope, and how to fix them. Continue reading
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DIY: Mini turntable strobe
A crystal controlled, USB powered strobe light for turntable speed adjustment, with selector for 50 or 60 Hz strobe discs. Continue reading
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Add-on: USB DAC integrated in Tandberg Huldra 11
A DIY DAC which lets an old receiver play music directly from a PC. Continue reading
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Modification: Tandberg Huldra 11 LED illumination
Radio dial illumination with LED strips and a DIY adjustable PSU. Continue reading
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DIY: Combined solder fume extractor and work light
Inhaling large amounts of solder fume is probably not healthy, so having a solder fume extractor may be a good idea. There are a lot of solutions on the market, from small and cheap (and inefficient) fans to place on your table top, to expensive ventilation/extraction systems for industrial use. Since the hot fumes rise Continue reading
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DYI: A mini “Arduino” which can power your peripherals
An ATMEGA328P based “Arduino” board with built-in switching voltage regulator, and wide input voltage range. Continue reading
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DIY: ATMEGA328P-AU bootloader burner
The ATMEGA328P is well known from basic Arduino boards like Uno, Nano and Pro Mini. When buying one of these boards, you can step directly into programming the microcontrollers from Arduino IDE. If you have bought the same microcontrollers separately, you need to install a Bootloader before you can upload code via the serial interface. Continue reading
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DIY: Bluetooth-to-AM-adapter
A low-range AM transmitter, hidden in a picture frame, for streaming music to vintage radio receivers. Continue reading
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µTracer (uTracer), part 8: Testing the DIY heater supply
Measuring the output voltage accuracy at different load currents. Checking whether the current limiter works as planned. Continue reading
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µTracer (uTracer), part 7: Making a custom heater voltage and current monitor
A measurement and display board which will be mounted on top of the heater PSU board. Continue reading
CATEGORIES
- Devices (58)
- Audio amplifiers (4)
- Broadcast receivers (13)
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- Microcontrollers (9)
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- Concepts (4)
- DIY (48)
- Modification (5)
- Recycled parts (4)
- Repairs (3)
- Restoration (8)
- Woodworking (1)
ABOUT ME
Self-taught electronics hobbyist. Collector of Tandberg and other Norwegian broadcast receivers.
Retronics 