Processes
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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 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 3: Making a custom USB interface
Designing and building a UART-to-USB plugin adapter for the µTracer board. Continue reading
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Concept: Low loss polarity protection using a MOSFET
Many electronic circuits are likely to get destroyed if the DC source polarity is reversed. Whenever there’s a possibility that the user might reverse the polarity by accident, the circuit should have an onboard polarity protection. In it’s simplest form, polarity protection may be implemented using a single diode: The drawback of this method is Continue reading
CATEGORIES
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ABOUT ME
Self-taught electronics hobbyist. Collector of Tandberg and other Norwegian broadcast receivers.
Retronics 