It's nice to see a source for Adam Power Supplies, but the price for a converted PC Power Supply is exorbitant. There have been others in the past that have sold such units for considerably less... ArcadeCollecting was one such person. Yes, I know, he didn't use a repurposed Adam power/Adamnet cord or include a printer hookup... but still.
The Apollo 400 Watt Power Supply for the ADAM Computer Memory Console is a top of the line power supply using the best quality material, which is one reason that the price is higher (It’s also the only 400 Watt Power Supply on the market for the ADAM Computer).
Yes, the Apollo 400 Watt Power Supply for $129.99 costs $30 more when compared to the $99 ADAM Power Supply that Milli Vee plans on releasing sometime in September 2018. In addition, the advantage of Milli Vee’s power supply is that it has a built in ADAMNET ports on the power supply itself plus a neat looking plastic case (some people prefer metal cases over plastic when it comes to high voltage power supplies). However, that Mean Well RT-50 watt power supply that Milli Vee is using has an online price of around $15. The Mean Well RT-50 Watt power supply that Milli Vee is using needs additional parts and labor to get it to work on the Coleco ADAM computer system and that is why the list price is $99 for his power supply design. Athena Powers Apollo 400 Watt Power Supply AP-MP4ATX40 can be found for around $35 which is more then double the price of the $15 Mean Well RT-50 power supply. In addition the Apollo 400 Watt power supply needs a Coleco ADAM wire harness to be purchased along with other high quality parts, plus a few hours labor removing the ATX wire harness and installing the official Coleco wire harness (plus the purchase of special tools to get the job done right).
Some might say that 400 Watts of power is over kill for the ADAM computer, however many brands and models of power supplies on the market when they get to be over 10 years old, sometimes start losing their full output capacity. If one starts at 400 watts and in 20 or 30 years later if the power supply is still working, maybe the power supply is only capable of putting out 200 watts. However, even 200 watts is plenty of power for just about anything connected to the ADAM computer.
The EBAY and Amazon fees raise the price on this power supply 20% to 25%. I do not have an official website to sale products on. However, if one were to contact me by private message, I would consider offering a 20% discount off the Apollo 400 Watt Power Supply for the ADAM Computer Memory Console if one were to pay with a money order. Or instead a 15% discount if one pays by PAYPAL directly. If contacted directly on the Amazon or EBAY interface, there would be no discount since the Amazon and EBAY rules require the sale to occur over their website interface.
Some information for those that want to install their own Coleco ADAM wire harness on their own Apollo 400 watt power supply
The 26 original 1983 Coleco ADAM DB9 power cords made this project a reality for the limited run. Now a Coleco ADAM compatible DB9 power cord needs to be developed. In the ideal world one should be able to order a 400 Watt ADAM Computer Power Supply directly from Athena Power with a custom Coleco ADAM compatible DB9 wire harness already pre-installed. Maybe that might be an option in the future. However it looks like a minimum order of 500 power supplies might be required if a Coleco ADAM compatible DB9 wire harness is developed by Athena Power’s Chinese engineers (Even though 500,000+ ADAM’s were made between 1983-1985, possible only around 5,000 people still use their ADAM computer for games, etc). So 500 ADAM power supplies might be way too many to meet exiting demands. If Athena Powers USA offices are able to install the Coleco ADAM compatible wire harness instead of the Chinese factory then maybe 50 official power supplies could be made, but the 300-500 number is a more realistic number to develop a full functional Coleco ADAM compatible DB9 power cable that matches or beats the existing quality.
Some parts that need to be ordered for those with the electronic skills to work on high voltage power supplies
This project would be a lot more easier if a fully modular ATX power supply existed with the -5 volts DC feature (If such a power supply existed, then the Coleco ADAM DB9 power cord could be plugged directly into a 24 pin ATX style module connector on the power supply without needing to open up the power supply). However the reality is no -5 volts DC fully modular ATX power supply was every released on the market. Also all or most ATX power supply companies have removed the -5 volts DC feature from all ATX power supplies being developed in 2018.
At one point in my email conversation with Athena Power, if I purchased a certain model of power supply they offered to install the 1983 Coleco ADAM DB9 power cord directly on their power supply if I shipped the original Coleco cords to them. When removing and installing a different wire harness one has the option to either solder the wires directly on the power supply or instead to use UL listed or UL approved crimp on connectors. Even though Athena Power and I have the skills to repair and modify things at the component level, a decision was made to not touch the original circuit board soldered components. The Apollo AP-MP4ATX40’s power supply was assembled using high quality robotic automation on the circuit board. Therefore, when the wire harness was installed, the original circuit board solder is exactly untouched and unmodified so that it would maintain all its safety certifications for the power supply section. The power supply uses both 18 gauge and 20 gauge wire for the actual power section of the wire harness. The quality electronic components used to install the Coleco ADAM DB9 wire harness to the power supply have amp and voltage ratings that far exceeding the quality of what is needed or required. Since there is many ways to modify or install a wire harness to a power supply I will not go into all the details of the components that were used for this project. Everyone might choose to connect the Coleco ADAM wire harness in a different way. Some people might spend 6+ hours de-soldering the wire harness from the circuit board and soldering the Coleco ADAM wire harness directly to the circuit board. On the other hand, some people might spend around 2.5 hours using high quality UL approved crimp on connectors and removing a massive amount of wires from the old wire harness without using any type of soldering iron. This Apollo Micro SFX power supply is very small compared to a full size ATX power supply (Nice cosmetic size but also harder to work on when the cover is removed). Some people might be twice as fast at converting a power supply to work with the ADAM since that type of work they do every day of their life. This project is for people that have the certifications and degrees to work on high voltage equipment. The power supply should be unplugged from the AC outlet before removing the power supply cover to prevent the possibility of being accidently electrocuted by touching the high voltage section of the power supply.
Some parts one might want to use
(The main part that is needed is the power supply with -5 volts DC). The best top of the line Desktop PC power supply on the market that has the -5 volts DC feature is the Athena Power Apollo 400 watt Power Supply model number AP-MP4ATX40. Amazon sales the retail box version of the AP-MP4ATX40 for $47.10 plus free shipping however a brand new AP-MP4ATX40 can be purchased in a OEM box for $34.98 plus free shipping from Outlet PC. And that $34.98 price is almost the same price that wholesale dealers purchase the AP-MPATX40 directly from Athena Power.
(The second most important part is to obtain the original Coleco ADAM DB9 power cords). Around 10 years ago I purchased around 25 Coleco ADAM DB9 Memory Console power cords from a ADAM dealer. That dealer no longer has the cords in stock and well most likely not be getting anymore. I believe I paid around $20 each for the original Coleco ADAM DB9 Memory Console cords. If one has an old Coleco ADAM printer or a Coleco ADAM printer power supply that no longer works, then one could remove the high quality Coleco DB9 UL listed power cord so that the cord can be installed on the Apollo 400 watt power supply. It is my understanding that in the year 2018 that no one makes a heavy duty Coleco ADAM DB9 compatible power cord anymore. So one needs to hunt for a broken Coleco ADAM Printer or Coleco ADAM printer power supply to make this project a reality.
(The third main component of this project is optional and is only required if one wants to still connect and use the original ADAM printer). A Gold plated DB9 28 gauge fully shielded cable can be purchased for $5.45 plus free shipping from Cables Online. One just cuts the female end off and wires the cable directly to the ADAMNET connection that is created inside the Power Supply. Some people for a few dollars cheaper might want to instead install a DB9 male connector on the outside of the power supply case. However, there are two issues with this. First issue is one needs to be skilled in drilling a hole through a metal case to install and mount the DB9 connector on the outside of the power supply. The second issue is with some testing I found that cosmetically plugging the Coleco ADAM printer cable directly into the side of the power supply case does not look good cosmetically. The better solution was to use the Cables Online $5.45 fully shielded gold plated cable that I mentioned above. It looks better cosmetically plus no need to spend time making a hole in a metal case to mount a DB9 jack. This cable is for very low voltage/current ADAMNET communication, the power supply built in the ADAM printer is still used to power the printer. The printer runs cooler since only the printer is being powered and the printer power supply no longer powers the ADAM computer.
(The fourth main component of this project is to either solder the Coleco ADAM wire harness to the circuit board or to use high quality UL approved and/or UL listed crimp on connectors). When I had the wire harness connected I decided to use parts that are above and beyond the needed voltage and amp rating that is required. So one can easily calculate around $10+ for supplies for each power supply depending on how one decides to attach the wire harness. Also purchasing some type of rubber feet for the Apollo 400 Watt power supply is ideal to prevent the surface counter and bottom of the power supply from being scratched. Remember normally these power supplies are installed internally in a PC instead of being installed externally.
Therefore, one is looking at a minimum of $70.45 including power supply and supplies to outfit this Apollo 400 Watt Power Supply so that it works with the ADAM computer. That is assuming that one has paid around $20 for the Coleco ADAM DB9 power cord. However, that price does not include the research and develop cost. Sometimes one runs into quality issues with supplies and materials and needs to switch to a different brand or style of connector (and purchase several samples of products to test their quality level). Another issue is I needed to purchase the proper tools to work on this project (some people might already own the proper tools). The wires that were stripped needed to be perfect quality with no missing strands, therefore a $74.45 Xcelite SAS3210 automatic 32 to 10 gauge wire stripper was used. This is the nicest automatic wire stripper that I have every used. In addition, I needed a SG Tool Aid SGT18980 crimping tool for around $100 for some of the UL listed connectors used in the project. This tool makes a perfect crimp every time that it is used.
Here is some important wiring information that one needs to know for this project
This link has useful information regarding the ATX power supply wire colors and what voltage levels is assigned to the wires inside the power supply and the ATX 24 pin connector.
Here is the pinout information for the Coleco ADAM DB9 power cord.
Pin 1 = +12V brown
Pin 2 = +12V red
Pin 3 = +5V orange
Pin 4 = -5V yellow
Pin 5 = ground green
Pin 6, 7, 8 are used for ADAMNET communication with the printer, etc = serial data clock, serial data, signal ground.
Pin 9 = no connection
If my memory is correct only wire pins 5 and 7 on the DB9 male connector if using the ADAM Printer (not in front of my ADAM to verify and would have to take the power supply apart to check the wiring). When wiring the ADAMNET data connection correctly a bug that use to cause the ADAM printer to advance the carriage return one line space after pulling the memory console computer reset well no longer occur anymore.
Here is a link to the DB9 Male and DB9 Female pin out assignments. They are different pin outs depending if the connector is male or female.
I hope this information is useful for those that are interested in converting a rare hard to find ATX power supply with the legacy -5 volts DC feature to work on their Coleco ADAM computer system.
Edited by HDTV1080P, Thu Sep 13, 2018 11:45 PM.