CMM2 Expansion System

Expansion system for CMM2 was created to add easy to use expansion system for CMM2

Schematic can be found here: schematic REV A v02

Expansion system and cards can be purchased here: PS Labs

1. 2x20 IDC connector compatible with Maximite
2. 2x13 IDC additional connection for expansion system
3. Power supply selector and power supply daisy chain jumper
4. Power supply selector and power supply daisy chain jumper
5. Edge connector slots
6. 12V DC 2,5/5,5mm connector
7. Place for filtering capacitators installation

WARNING!

⚠️ Maximum thickness of expansion card is 1,6mm. 1,6mm Expansion card have to have edges chamfered using unchamfered card will result in slot damage. Expansion cards with thickness 1,2mm or lower can be used without chamfer

Daisy chain

Expansion System connected to Maximite 2 can be daisy chained to further expand its potential.

Assembly

1. Install protection diode D1. This diode prevent reversed polarity on 12V supply. Instead of diode You can also close jumper JP1, please remember that You will about risk of revers polarity on 12V line, reversed polarity will damage expansion system, expansion cards and Maximite unit.
2. If needed install smoothing capacitators (not included in kit) C1, C2, C3
3. Cut goldpin headers with pliers to correct length and install J6, J7, J8. J9
4. Install DC connector J3
5. Install IDC connectors J1, J2, J4, J5, for correct orientation check chapter "Old vs GEN2 expansion build"
6. Install edge connector slots, be careful to align 8 and 60 pin slot in each row, assembly tool added to the kit should be used

7. Install jumpers accordingly to chapter **"Power supply selector and power supply daisy chain"**

Current vs GEN2 IDC connector placement

PS Labs is preparing to introduce new Maximite Deluxe model called GEN2, since IDC40 pin layout will be changed in GEN2, You have to double check pin layout before connecting. Please refer to image below to find out how IDC40 connector should be placed on older and future (GEN2) models:

⚠️ Not following this guideline will result in short circuit an possible damage to Maximite and/or expansion cards

Power supply selector and power supply daisy chain

J6, J7, J8. J9 are used to decide if various power lines should be daisy chained between expansions or Maximite and expansions

Jumper	Desc.	Remarks
J6, J7	12V	12V line from external 12 power supply connected to Maximite Deluxe or Expansion
J6, J7	5V, 3V3	high efficient 5V and 3,3V from power expansion card
J6, J7	p3, p4	additional power lines currently not used
J8, J9	5V, 3V3	5V and 3,3V line from Maximite power line

Example

Lets assume following setup: Maximite Deluxe GEN2 >>> 1st Expansion >>> 2nd Expansion and jumpers on 2st Expansion set as below:

12V power from Maximite 12v power supply will be connected to first and 2nd expansion. 5V and 3,3V from internal power supply of Maximite will be connected to first expansion but will not to 2nd. 2nd Expansion will receive 3.3V, 5V power cards on 1st expansion.

How to make expansion card

Everything needed to start creating Your own expansion cards can be found here:

Kicad expansion card

Expansion cards

Following expansion cards are available or are in development:

ID	Name	Desc.	Status
01	Mouse/joystick card	adds: USB mouse (HT chip) including wireless, Atari joystick, Nunchuk port	done
02	Relay card	Relay card controlled by shift registers, can be daisy chained, only 3 pins needed to operate multiple cards	in progress
03	Power card	delivers high amperage 5V and 3.3V to be used with power hungry cards	done
04	Prototyping card	simple prototyping card	done
05	WiFi card	adds wifi functionality, includes USB to RS chip allowing easy flashing and communication with pc	done
06	Shift register card	helps to learn how shift registers work, 16 led operated from 3 pins, can be daisy chained	done
07	rs232 card	adds 2 standard RS232 ports	in progress