From c2f7272a045d567ec5256a7b946c5d4ef4fa8301 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Lauri=20V=C3=B5sandi?= Date: Wed, 9 Aug 2017 01:49:41 +0300 Subject: [PATCH] More assembly tips --- README.md | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 4aabdcd..720879b 100644 --- a/README.md +++ b/README.md @@ -7,7 +7,7 @@ Yet another Nixie clock project! Some highlights: * K155ID1 driven IN-12A or IN-12B tubes for hour, minute, seconds -* BS107 driven IN-6 or similar for digit separation +* BS107 driven IN-6 or similar neon bulbs for digit separation * 74HC595 for serial to parallel conversion * ESP8266 for time synchronization * LM1117-3.3V and LM1117-5V regulators for logic power supply @@ -46,3 +46,11 @@ Once the PCB is milled or etched make sure you clean the 180V rails thoroughly, that voltage is high enough to cross gaps of 0.1mm. Once that happens it burns a thick dark trace into the fiberglass of PCB and it's pretty tricky to clean up. + +Use the bench power supply to gradually power up the device, +at 9V set current limiter to 0.5A max. +5V linear regulator can be omitted and bypassed if 5V wall adapter is always used. +Otherwise 6V-12V wall adapters are suitable, +Thincan DBE60 9V wall adapters are pretty much perfect for the job. +Note that the higher the input voltage the more power is dissipated +as heat on the 3.3V and 5V voltage regulators, thus at 12V the device gets really hot.