The Princeton Technology PT2399 delay chip is an absolute DIY staple ingredient! The number of circuits based on this fantastic little chip is really amazing. It can produce delay times from about 30msecs out to around 350msecs, although you can push it further to 500 or 600msecs if you’re happy with the decidedly “lo-fi” quality […]
I’d like to share a couple of things I’ve had kicking around on my desk for a long while. The first one was a simple optical tremolo, and for this second StompLFO project, we’re going to use the StompLFO to apply modulation to a PT2399 delay. This is actually very simple to do! PTWobble, StompLFO […]
A PCB for the DigiDelay 4 second digital delay project. This PCB is designed to fit into a Hammond 1490BB enclosure in landscape format, and can be used with PCB mounting pots for a simple, reliable construction.
The Electric Druid DIGIDELAY is a 16-bit, 32-KHz delay processor. With the addition of a couple of SRAM chips, it can provide up to 4 seconds of delay. Full details are on the DigiDelay project page, but it offers the usual delay controls of Delay Time, Repeats, and Delay Level, plus high pass and lowpass […]
Buy a DigiDelay PCB, complete with the DIGIDELAY delay processor chip and two 128KB SRAMs, and save money compared to the separate price.
A pair of SRAM chips for use in the 4 second Digital Delay project. The 23LC1024-I/P is a 128KByte RAM chip with an SPI serial interface. Two of these chips are used in the DigiDelay project to produce up to 4 seconds of delay with 16-bit data and a 32KHz sample rate. For full details, […]
A set of five of the PCB-mounting right-angle potentiometers used for the DigiDelay DIY 4 second digital delay project. The pots are Taiwan Alpha 10K Linear 16mm pots, widely used for stompbox projects. They have a good solid feel and are a quality part. They mount on the back side of the DigiDelay PCB, which eliminates […]
Recently I’ve been working on a four second digital delay with tap tempo and delay trails. There are lots of digital delay projects already, but the vast majority of them are based on the PT2399, which limits both the length of the delay and the sound quality. A quick summary of the features: 0 […]
I recently saw an advert for the new EHX Slapback Echo reissue pedal and thought it was a cool little thing and would make a nice project. The original pedal came out in 1978 and was about as simple as it could get. There was one “Blend” knob to mix the straight and delayed signal, and […]
I’d like to share a couple of things I’ve had kicking around on my desk for a long while. They also show a couple of ways to use vactrols. One is a simple optical tremolo, presented below, and the other is a modulated delay effect. StompLFO Optical Tremolo One very simple way to produce a […]
