The PT2399 Delay Dev Kit is a great way to get started experimenting with the PT2399 Echo Processor IC!

Features:

• Based off of Princeton’s PT2399 Echo Application Circuit (straight off the datasheet), this PCB gives you the exact set-up recommended by the manufacturer. Engineers and hobbyists alike can use this basic design to modify it for their own purposes The PT2399 Echo Processor IC is a very versatile circuit with adjustable input/output filtering, delay length, wet/dry mix, and a lot of unexplored potential!.
• On-board 5V regulator allows for multiple powering options and interfacing with digital circuits. Use a 9V battery, 9-18V AC Adapter, or connect it to your central power supply (such as Eurorack ribbon cable power supplies).
• 2 potentiometer placement positions adhere to the datasheet schematic, allowing for direct control over how much delay is present in the output signal. Delay length is variable from fast slapback echo to long dub-style repeats to noisy long repeat madness! Mix allows you to set the wet/dry portions of the signal.
• The PT2399 Echo IC was designed to mimic old-school analog BBD delay with modern digital sampling technology. Repeats degrade at higher delay lengths, resulting is a very natural well-filtered reproduction of your synth/guitar tone.
• PCBs are professionally manufactured in the USA by Imagineering, based out of Elk Grove Village, IL, and designed here at Synthrotek. PCB silkscreen, through-hole components with careful on-board placement, and wire-tension relief holes were designed with the DIYer in mind!
• PCB Dimensions: 3.125\” x 1.375\”
• Great for synths and guitars! Easy to configure and mod your circuit for a greater delay range, delay length modulation, and a lot more!

Synthrotek Store

Assembly Instructions

Bill Of Materials

Data Sheet

The Optical Theremin is ready to rock! and ready to synthesize! or to scare your grandma, or your cat or something, either way the kits and assembly instructions up now! Check it out!

Store

Assembly Instructions

Bill Of Materials

Our new Optical Theremin circuit is off the hook! It has two optical resistors controlled by light that change the pitch and the volume of a 555 timer oscillator. We have the PCB’s up in the store. Kits and assembly instructions will be up soon!

For a list of parts check out the Bill Of Materials

Our new Atari Punk Kits are builder-friendly with bigger through-holes and cleaner instructions.We also added an SPST switch with an A1ook audio taper pot instead of the B500k switch pot. It makes the volume pot steadier and allows more options for control.  It also has two CV inputs! Check out the links below.

STORE

ASSEMBLY INSTRUCTIONS

B.O.M

All our schematics are now posted on synthrotek.com under Tech-Schematics. We’ve had a lot of people asking for them so we decided to release them for all eyes to see. We hope they will be helpful for our customers! Feel free to check it out. Also, Atari Junk Instructions and new Atari Punk Instructions coming soon.

Here is a link to the schematics page.