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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Tuesday, 4 August 2015

Very Accurate 10volt and 5volt Reference For Testing Multimeters etc. Stripboard Layout

I thought this would be a good project to keep around to see if my digital multimeter has drifted out of calibration.

I power it from a normal bench power supply but it would probably be better if you used 2 9v batteries in series.

The LED on it displays when over 100mA is being drawn from it - basically if the LED is lit disconnect it or things will be getting very hot!

I tested it in free air with open windows over 2 hours and it was very stable so I can rely on it.

Linear Tech do a few different drop references for this IC
the 2 I've tried are the 10 volt reference and the 5 volt reference
the part numbers are
10 volt reference; LT1021BCN8-10
5 volt reference; LT1021CCN8-5

it stayed at 10.0006 for over 2 hours - the least significant digit moved around but that's 10's of uVolts!

Friday, 17 July 2015

Frequency Meter Stripboard Layout

I built this as a rough frequency meter to make sure a bunch of oscillators were oscillating in the right ballpark frequency.
it uses the lovely 555 timer IC.

it responds best to squarewave signals (maybe triangle too, I forgot to test it with triangle waves)

Tuesday, 14 July 2015

Quick And Dirty Laser Driver Stripboard Layout

This was just a quick little circuit I built to test all the salvaged CD/DVD lasers I have.
essentially it is a adjustable constant current power supply.

the Vin is 7.2 volts.

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