Can I use multiple small AC adaptors to make a working Colecovision AC adaptor? For example, two 5V, one 12V and the ground. Colecovision AC adaptors are too expensive.
Yes, as long as:
- You use power supplies that can deliver the amount of current the ColecoVision needs.
- The 5V power supply grounds are 'floating', i.e. not connected to ground or neutral from the power cord (this is required so that you can hook up one of the 5V supplies backwards to get -5V from it).
- You have sufficient electric/electronic knowledge and experience to do this without creating a safety/fire hazard and/or injuring yourself.