Category: English
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Neon Watch design-information
Specially for those desiring to build their own neon-indicator watch, or for those who just want to know how it’s made (Bunch a’ enginèèrds! 😉 ). In this blogpost I’ll share the design files. (Ook in het Nederlands beschikbaar) For those that rather watch the outside of the watch: here is a link to the…
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Optical data-transmission
In the post about the neon watch I mentioned the neon watch gets set to the correct time by a computer program that flashes the screen to send the time. Since that post I have modified my ‘lichtwekker’ (Light-up alarm clock / lineair clock) so that too can be used to set the neon watch.…
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SMD on breadboard
When soldered between pinheader pins, SMD components can be used on breadboard. With a bit of trouble they can even be labeled, but a reference picture or keeping them in labeled ziplock baggies is clearer. The components in the picture where used for breadboarding the neon watch.
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Neon watch
Inspired by Nixie watches (like the original from cathode corner, or this other one), I thought it would be nice to make a watch with neon indicator lamps. This blogpost shows the result. (Ook in het Nederlands beschikbaar)
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Give it time
In hindsight, it’s obvious. Switching the ADC reference voltage takes a bit of time, the voltage on the AREF pin cannot change instantaneously. The Atmega48/88/168/328 datasheet recommends to discard the first sample after changing the reference voltage (in paragraph 24.5.2). So I did. But still I got false readings (or rather: my Atmega48A did). I’m…
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Battery replacement for Kobo Glo
My Kobo Glo sometimes suddenly restarts. I’ve had it for so long that I did not know for how long, but it turned out I bought it in 2013. So it, and its battery, is about 10 years old. The battery seemed still fine – okay runtime and voltage does not significantly sag under load…
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tip: AVRdude on mac – using built-in from arduino
More of a note to self*, since installing avrdude resulted in an avrdude without USB support. While Arduino also uses avrdude “under the hood”, but has USB support. And it would be nice if Arduino’ s avrdude can be used stand-alone, and it can: “/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -cusbasp -Pusb -e -Ulock:w:0x3F:m -Uefuse:w:0xFD:m -Uhfuse:w:0xDA:m -Ulfuse:w:0xFF:m…
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Real Time Clock modification
I bought one of those Real Time Clock modules: I noticed it has a diode and resistor to charge the battery on the back. But I plan on using a non-rechargable CR2032 cell. So these had to be removed: I also removed the power LED, since I plan on using it in an alarm clock…
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USBisp V2.0 to USBasp conversion to use TPI (or: USBisp did not connect to usb anymore after fw update – fixed!)
Recently I bought an USBasp, or at least that’s what I thought. I bought a clone that was advertised as “USB ISP USBasp USBisp Programmer for 51 ATMEL AVR download support Win 7 64 (RANDOM COLOR)”, marked on the case as “USB ISP version 2.0” and “MX-USBISP-V5.00” on the PCB. I intend to use this…