08/14/2009

Backup battery circuit from dos4ever...

Backup battery circuit from dos4ever website.

Backup
Backup



Aug 14, 2009 10:54:29 PM

08/03/2009

E-trex owners manual

http://etrex.webz.cz/hack.html

Aug 3, 2009 8:05:28 AM

02/18/2009

Box top

Nixie display acrylic box top with 20mm holes drilled using hole saw. Pre-drilled with 5mm lead holes.

DSCF1515 (Small)
DSCF1515 (Small)



Feb 18, 2009 7:22:36 AM

02/03/2009

Light Dependent Resistor

LDR
LDR
Unique light dependent resistor (LDR) in a glass case. The only one among a bunch of other more common LDRs.
Feb 3, 2009 7:20:32 AM

01/26/2009

Power supply and nixie test

Power supply and nixie tested successfully.

DSCF1425 (Small)DSCF1434 (Small)



Jan 26, 2009 11:24:14 PM

Nixie Tubes IN-8

Tubes finally arrived from Moscow.

DSCF1422 (Small)
DSCF1422 (Small)

Jan 26, 2009 10:57:51 PM

High Voltage Power Supply

12V to 180V high voltage flyback power supply finally completed and tested successfully on breadboard.

PS
PS

  

Jan 26, 2009 10:51:34 PM

Circuit for Nixie Power Supply

Based on Ronald's circuit for flyback boost converter but with some minor changes to components which were not available locally. Basically, IRF740 MOSFET transistor, unknown Inductor, FR305 fast switching rectifier and transistor MPS-A42.



Jan 26, 2009 10:42:27 PM

Bell Timer

DSCF1482Small.jpg
DSCF1482Small.jpg
A professional bell timer Series 56 from R H Rhodes. This one is more than 30 years old and still working. In fact the same model is still being manufactured. Wow.
Jan 26, 2009 10:04:34 PM

QotD: It's Complicated

What's the most complicated part of your life right now? Trying to figure out how to mount a few vacuum tubes without tube sockets.

Jan 26, 2009 9:50:54 PM