Blog

Hiraga PreAmp .. build 5

2019-03-17T20:59:15Z

And the planet spins and life goes on. This has been a build from hell, nothing is normal, no chassis, or priced out of sight. My two preamp modules are 6" x 3" x 1.5" first I tried the guerrilla break which was very disappointing. I had the right Id...(read more)

Hiraga PreAmp .. build 5 - software for a tube amp?

2018-12-20T05:07:50Z

Well, life is still not on a good keel. I picked up at Fry's a proto shield, and some optocouplers. So the world keeps spinning and I am using a software-controlled power-supply I don't have a formal sketch but this is what it will do: Cod...(read more)

Pulse Hunter

2018-12-15T10:55:00Z

This blog post is intended for Project14 - 'Back to Analog'. ooops... I think I missed the deadline :-( When I started this project, I posted a status update and 14rhb suggested to share it into the 'Back to Analog'. Unfortunately I forgot an...(read more)

Hiraga PreAmp .. build 4

2018-12-12T06:54:42Z

Well, life really sucks a good friend of mine is dying and I have been out of town for the last week or so. And I am going back tomorrow. The Gorilla Brake did not work for the two smaller boxes so pop-rivets will work. The power supply is a nightmar...(read more)

CVBoard: new way to play with modular synths

2018-12-03T18:37:00Z

CVBoard is a board designed to generate two Control Voltage (CV) signals using Arduino. This prototype is destinated to analog synths and EuroRack modules enthusiast. CVBoard has two jack outputs from which it is possible to take the CV signal...(read more)

LED fade in/out effect

2018-12-01T23:35:00Z

The basic idea was to create a simple LED fade in/out effect circuit. I have used here a single dual op-amp NJM4556 which first stage is configured in comparator mode and second stage is configured as integrator. Triangular wave from integra...(read more)

Hiraga PreAmp .. build 3 Gorilla Brake

2018-11-30T18:56:19Z

Normally I would have just bought some aluminum boxes but the prices are ridiculous, and I did not have a finger break to make my own. Having no real metal brake, I had to improvise. and the results were better than I had hoped for. So here is what w...(read more)

555 Timer Voltage Inverter

2018-11-28T07:30:00Z

I still have work to do on my Kelvin (4-wire) Milliohm Meter project, one item of which is to improve the accuracy of the meter when measuring below 3 milliohms. I suspect the problem may be that the instrument amp is too close to the ground r...(read more)

Tube Amp on a PCB

2018-11-27T05:57:00Z

Long, long ago in a far away place outside of the box, I was challenged to build a tube amp to explore the sound of tubes clipping. The idea was to make a tube amp that could clip at low volume so we didn't have to wake up the neighborhood to explor...(read more)

Hiraga PreAmp .. build 2a

2018-11-19T04:18:00Z

Well, Christmas or Hanukkah came early this year! These parts are what I call almost unobtainium! I wish to thank Tariq and the E-14 family for this dotation. Whoopie! Now to just get this thing built and tested. Fins! Back to the Monthly Inde...(read more)

Hiraga PreAmp .. build 2

2018-11-18T22:46:00Z

As you all know I have been stripping a SONY Cassette Player/Recorder TC-188SD. After stripping I still have tons of room to stuff my 3 toroids, power supply, 6 relays, Caps, 4x 12AX7, in nice colored shields, a TI MSP430 for control, and a pa...(read more)

Hiraga Pre-amp: Build part 1

2018-11-08T00:44:00Z

Well, at last, I found my donor, a SONY TC-188SD Cassette Player. The cassette door will be clear plexiglass so can see the tubes glow. If I can get the parts, I will have a rather unique power supply that you only see in very exotic stuff. There a...(read more)

RIAA Pre Amp

2018-11-05T15:10:57Z

Times are a changing! I just ordered 4 ciramic tube sockets and 4 shield sets ( two in blue, and two in red ). I was asked why the two colors? "Because I can." Was my answer hey right and left chanels. I have a older Sony cassette player, I think it ...(read more)

Pseudo random number generator

2018-10-14T19:18:05Z

Back to AnalogEnter Your Electronics & Design Project for a chance to win a $100 Shopping Cart!Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll The basic idea was to create simple circuit with usage transistors, ...(read more)