Simple Dual LED Battery Monitor stripboard layout

I got some 3 pin dual LEDs and I thought a good use for them is as little 9v battery status monitors for my guitar pedals. so I came up with this quick circuit that fades from green to red as the battery voltage drops (as shown in the video)

it's a good little mod circuit for any project you want to build that uses a 9 volt battery (or existing stuff you own)

Ruby Amplifier Stripboard Layout

I got the schematic of this from http://www.runoffgroove.com/ruby.html - I just wanted to make a really quick test amplifier and the Ruby amp is good for this. it's quite loud relative to its size.

if you want some power amplifiers with more power than this one check out the "Power Amplifier" stripboard layouts on my site. http://www.paulinthelab.com/search/label/Power%20Amplifiers

My bands albums;
Double Negative - The Day The Dark Won
Double Negative - When We're Gone
Digital Versions

Mains Failure Alarm Stripboard Layout

I have a fish tank and in it - lives many tropical fish - however the other day the plug socket switch the heater was plugged into somehow got knocked off. luckily I noticed the heaters light wasn't on and the water temp hadn't dropped so the fish were safe however I wanted to make a little device to warn me if the mains got turned off somehow without having to wire it to the mains directly.

So here we have a little device that starts beeping if the mains is turned off - obviously this is battery powered but the battery should last a long time because it's very low current draw.

the trim pot on the board adjusts the sensitivity of the antenna which is just a piece of wire than you wrap around the cable you want to monitor.