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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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Concept: Electroshock therapy for malfunctioning transistors
Tin whiskers is a common failure mode on 1950s and 60s transistors. Here’s one way to fix it. Continue reading
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Restoration: Tandberg Sølvsuper
The first model in the Sølvsuper series, which spanned from 1936 to 1978. 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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Concept: Powering bluetooth audio adapters
When driving a bluetooth audio adapter from the same power source as the amplifier, noise is likely to occur due to ground loop issues. This post shows one way to avoid this problem. Continue reading
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µTracer (uTracer), part 10: Practical use + preliminary verdict
Video demonstration of tracing anode characteristics of an EL84 + some my thoughts about the µTracer so far. 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
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µTracer (uTracer), part 6: Making a custom heater supply
The design of a switched voltage supply with adjustable voltage and current limit. Continue reading
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µTracer (uTracer), part 5: Heater supply using a simple buck converter?
The pros and cons of using a standard buck regulator. Continue reading
CATEGORIES
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ABOUT ME
Self-taught electronics hobbyist. Collector of Tandberg and other Norwegian broadcast receivers.
Retronics 