Welcome - Please Read

Welcome. I wanted to provide stripboard layouts I've made to help people new to electronics and even the more experienced get into different aspects of electronics.

I verify the layouts before I post them.

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Thursday, 7 May 2015

Simple Audio Mixer Stripboard Layout


this is a quick project I made for another project I'm working on but I'm sure people will have uses for this so here you go.

it's also worth noting (as I have before) the purpose of C1 is to limit the bandwidth of the Op-Amp - in this case I've used a value to stop any hiss however you can experiment with the values and make a low pass filter - the higher you go the more it cuts off.




Friday, 24 April 2015

Proper Op Amp Termination


I've been designing a sampler recently (sorry, there won't be a stripboard for that, it's way too complicated!) however I was using a quad opamp for a part of it but I only needed 3 of the op-amps which gave me the idea to post a little tutorial on the correct way to terminate unused op-amps and a brief explanation why (I'm sure there are very in depth youtube videos/documents elsewhere)

the extremely brief reason to terminate a op-amp correctly is that it may draw extra current or it will pick up noise (or both)




Sunday, 12 April 2015

2 Watt Transistor Guitar Amplifier Stripboard Veroboard Layout


When I was young (about 9 or 10) - this is one of the first "big" projects I successfully completed and still actually use to this day so I thought I would build a new one for everyone to enjoy.




Tuesday, 7 April 2015

Tuesday, 31 March 2015

ADSR Envelope Shaper Stripboard Veroboard Layout


I've been a bit busy recently so I thought I'd scan this interesting looking project in from a magazine from the 70's





Sunday, 22 February 2015

Blue Wizard Overdrive / Distortion Stripboard Veroboard Layout


This is the Blue Wizard - part of my "wizard" design series (Green Wizard HERE) - this is a very harmonic rich overdrive/distortion that uses 2 BC182L transistors (cause I have a load of them) - this is the same transistor used in the Brian May treble booster HERE

it has a bias pot onboard and I find it's best to adjust it till it sounds good to you.

anyway - below is a quick sound sample - the 1st bit is the gain all the way up and the 2nd bit is the gain half way up.






Tuesday, 13 January 2015

Boss OD-1 Original RC3403 Quad Op-amp Stripboard Veroboard layout


This is something I've wanted to re-visit for a while, I was never happy with my original layout - you couldn't use the proper op-amp in it and it was a bit crappy looking too.

I have added 2 parts to this build, neither affect the sound - they protect the circuit from the wrong polarity supplies which is necessary if you use the original RC3403 op-amp because it costs a fortune.

you can of course use a jellybean quad op-amp like a TL074 or LM324




 

Sunday, 14 December 2014

Electronic 3 Band Equaliser Stripboard Veroboard Layout


There are lots of circuits on the net for 3 band EQs but I wanted something a bit more powerful than the usual 20+dB/20-dB things on offer so I went on eBay and bought some grey market MC3340P attenuators from china and made this thing.

I made mine for a send/return loop in a very simple valve amp I have but it's perfectly capable for hi fi audio.

it's worth noting that this works very well if you turn the knobs slowly because they aren't actually in the audio chain - they are part of the voltage control architecture of the chip

It's also worth noting that it will work on 9 volts if you want to make it into a guitar pedal.



Tuesday, 11 November 2014

Obsidian Overdrive Stripboard Veroboard Layout

This is quite a brutal high gain overdrive by Joe Davisson based on another pedal called the massacre.
it's a very mod friendly circuit - some good places to start are changing some of the capacitors (C1, C6 and C8) for example.
I actually knocked the layout up in 15 minutes but because I have been in so much pain due to a dislocated knee - it took me 2 sittings to actually build it (the valium kicked in 30 minutes into the first half)
anyway it sounds immense
if you have any issues with switching refer to FX Switching

REMEMBER THIS IS A POSITIVE GROUND CIRCUIT - it needs it's own isolated supply eg a battery
otherwise you're going to have a bad time



Sunday, 19 October 2014

Guitar FX Switching Diagrams


I keep getting requests to do some diagrams on how to wire up guitar FX circuits so I've done the ones I use.