Author Archives: Antanas

Arduino AT24C08 EEPROM Driver

Unlike some other I2C EEPROM IC drivers, AT24C08 / AT24C08A need their 2 MSB address bits sent in the first device address byte. This assumes the A2 pin is connected to ground:

The M5 memory slot of the Velleman PS3005D / Korad KA3005P is described in the manual. There is not much to it: To recall M5 settings, press M4 and turn the dial clockwise; To save M5, do nothing. It is auto-saved

Velleman PS3005D remote control commands

A summary of serial commands for the Velleman PS3005D lab power supply:

Logitech MX Revolution Silent Mod

There is a nice tutorial about silencing mouse buttons at instructables. I have done the same on my MX Revolution, the difference is obvious. The screwdriver shows the tabs to press and bend. Put on some sticky tape on top of the button to hold the little pin in place.

How to Map Logitech MX Revolution keys in Linux Mint

btnx is no longer available on newer Linux Mint (probably Ubuntu too) releases. This is a working alternative. Install easystroke: A new icon appears in notification bar. Open the application. In Preferences->Additional buttons add the buttons you want to configure. I need the thumb scroll to switch between tabs – forward, back and close.… Read More »

Mastech HY1803D 10-turn potentiometer upgrade

I have just upgraded my Mastech HY1803D lab power supply with a 10-turn voltage adjustment potentiometer. In order to perform the upgrade, you would need a 6.8K potentiometer (at least the original is). The trickiest part is removing the knob from the old pot. It is glued on, use pliers, soft padding and some leverage… Read More »

Mono SerialPort.DataReceived Event Workaround – Using a Derived Class

A followup to an older post of mine: http://antanas.veiverys.com/enabling-serialport-datareceived-event-in-mono/. The previous approach required rebuilding Mono with a small patch. Here is a derived class that does the same.

LED Flashlight Power Saving Mod

I’m quite disappointed about how fast my LED flashlight drains its battery. This mod will reduce the current consumption and hopefully still give enough light for cycling.