A multi input/output interface expansion board for the ZX Spectrum which gives it Analogue input/output , Digital Input / output and i2c capability.
Originally designed by Ian Johnston and now manufactured and sold by DCS Electronics.
Specification
ADC - 4 Analogue inputs 12 - 18 bit configurable
DAC - 4 Analogue Outputs 16 bit
24 x Digital I/O (8 outputs , 8 inputs ,3 on boards Led's , 4 onboard jumpers & i2c
16bit Analogue Output = Range 0 to 5vdc (0 - 65535, actual minimum output voltage typically 0.05Vdc).
16bit Analogue Input = Range 0 to 10Vdc (0 - 65535).
Digital outputs = ULN2803 darlington logic buffer. Datasheet here.
Digital inputs = 10k pull-up to +5.3vdc, external connection via contact to 0vdc (GND).
I2C = Bi-directional I2C communication to further external Slave.
NOTE: The interface is tested with a 48K ZX Spectrum Issue 2 (Important: It is untested with other versions, I do know it doesn't work with the 128K Toastrack, I never got around to troubleshooting).
What you get:
Fully assembled & tested ZX Spectrum Multi I/O board V1.0
USB flash drive containing a copy of the open source development software I collected during the project (Spectranet zmakebas, z88dk C Compiler, Boriel ZX Basic Compiler, ZX Spectrum TNFSD), and also the demo BASIC program I wrote which demo's how to program the interface.
Printed diagram showing the I/O connections.
You can pre order this item - we aim to have it shipped around 6/8 weeks from order
