Check the listing for details. Captain Credible Bitmath Music Weasel DIY ATtiny85 Synthesizer PCB Soldering Kit. Condition: New. Listed at 6.50 USD. UPDATE: This listing now includes the genuine Microchip(TM) ATtiny85-10PU chip, CR2032 battery holder, and MJTP1230 tactile switch. Note: I am not Captain Credible, just a big fan and fellow DIY synth enthusiast. Up for sale is this new PCB, ATtiny85 microcontroller chip, battery holder, and tactile switch for the Captain Credible Bitmath Music Weasel programming/development kit. Captain Credible uses these to develop his generative EPs like "Dead Cats" and "Fantasy Mansion." It's basically a breakout board with all the possible parts that could be used with easy-to-access male header pins and 6-pin ISP programmers. Easier to handle than a mini-breadboard and thus more useful for the creative process, the focus can now be shifted to repeatedly iterating the programming of new music. Here is the full BoM for the other parts (not included in this listing--you only get the PCB, ATtiny85 microcontroller chip, battery holder, and tactile switch): one 8 pin 7.62mm DIP socket, 2.54mm pin spacingtwo 220ohm resistors, 6mm longone 1Mohm resistor, 6mm longsix 1k resistors, 6mm longthree 2-pin header jumper, 2.54mm pin spacing p/n QPC02SXGN-RCone photoresistor G5528one CUI Devices SJ1-3525NG-GRone 2x3 male pin header, 2.54mm spacing for ISP programming, Wurth Electronik 61200621621one (probably) 10k linear potentiometer, Bourns PTV09 9mm Series, mount-to-pins = 7.0mm, pin 1 to pin 3 = 5.0mmtwo 1x4 male pin header, 2.54mm spacingtwo 1x3 male pin header, 2.54mm spacingthree 1x2 male pin header, 2.54mm spacingthree 1x1 male pin headerone CR2032 battery Ships 2oz. USPS First Class Package