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.