Manic1975 Posted October 4, 2013 Share Posted October 4, 2013 One question. I'am not shure if someone have try this. I have european TI99/4a. Is it possible to use 12V from video output to power CF7+? I can put voltage regulator to have 5V for CF7+. I know that CF7 use 5V and 1A voltage, but does TI give 12V and 1A voltage on video output? I use F18A for video output so I don't need original video output. Please help. 1 Quote Link to comment Share on other sites More sharing options...
Stuart Posted October 4, 2013 Share Posted October 4, 2013 With my console, I've opened the case, soldered a wire with connector directly to +5V on the PSU board, and fed that out through the expansion port hole to connect to the CF7. Stuart. 2 Quote Link to comment Share on other sites More sharing options...
ti99iuc Posted October 4, 2013 Share Posted October 4, 2013 nicely ! could you post a detailed picture on how to do it ? Quote Link to comment Share on other sites More sharing options...
unhuman Posted October 4, 2013 Share Posted October 4, 2013 (edited) Thought the CF7+ was 6-9V, but if 5V works that's awesome. Would love to see a pic too! I'd love to embed the CF7+ inside my console somewhere (or speech synthesizer type thing (speech is too small)). Found the web site. 5V: http://webpages.charter.net/nanopeb/ Edited October 4, 2013 by unhuman Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted October 4, 2013 Share Posted October 4, 2013 I am using a 5V 1A adapter with mine. Travels well. I have given thought to a simple 5V regulator connected to the video port. Would be nice if it could be powered by the TI via the expansion port. Quote Link to comment Share on other sites More sharing options...
Stuart Posted October 5, 2013 Share Posted October 5, 2013 nicely ! could you post a detailed picture on how to do it ? Well since you ask ... WARNING: This is for powering a NanoPEB that takes a regulated +5V supply. I take no responsibility for blowing up or otherwise damaging the NanoPEB, the console, or yourself! What you'll need: -- A piece of 2-core cable - I used some speaker wire. About 12" long. -- a 2.1mm DC power plug - to fit the connector on the NanoPEB. -- Soldering iron and solder. -- Sharp modelling knife. Remove the bottom cover from the console. Looking at the photo below, identify the +5V and 0V outputs on the PSU board. I've used the back of the connector that the cable from the motherboard plugs into as a convenient point to solder the wires to. If you remove the two screws securing the PSU board, you can turn it over and the connector pins are labelled. I've soldered the wire with the white strip on the insulation to +5V. (Ignore the red wire in the photo - that's a +12V supply for my EPROM programmer.) Solder one wire to the +5V output, and one to 0V. With the DC power plug, solder the +5V wire to the tip, and 0V to the shield. Route the cable out through the expansion port hole. CHECK YOUR WORK. Make sure you haven't shorted out anything, and you've got the wires round the right way. Use a multimeter to check you have the correct voltage (+5V) and the correct polarity (centre positive) at the DC power plug. Reassemble the cover. Using a modelling knife, carefully remove a small piece of plastic from the side of the expansion port to provide a recess for the cable to sit it, to stop it getting trapped by the NanoPEB connector. Fit NanoPEB, plug in connector, turn on and test. You attention is drawn again to the warning at the top of this post! Stuart. 3 Quote Link to comment Share on other sites More sharing options...
ti99iuc Posted October 5, 2013 Share Posted October 5, 2013 NIIIIIICEEEEEE ... thank you i will try to do it soon Quote Link to comment Share on other sites More sharing options...
unhuman Posted October 5, 2013 Share Posted October 5, 2013 (edited) Very much like this!!! Reminder to make a reinforcement loop of the wire inside the console. Rather than make my own connector, I'll just sacrifice an AC adapter. -H Edited October 5, 2013 by unhuman Quote Link to comment Share on other sites More sharing options...
Manic1975 Posted October 6, 2013 Author Share Posted October 6, 2013 (edited) Anybody know voltage specifications of video output? I know it have 12V but don't know how many A? I hope it have 12V and 1A. Is this 12V directly connected from power supply in TI99/4a? What are specifications of this 12V. This way I can use voltage regulator to have 5V and 1A for CF7+. This way I modify connector and get power from there. Please help!!!!!!!! Edited October 6, 2013 by Manic1975 Quote Link to comment Share on other sites More sharing options...
+Lee Stewart Posted October 6, 2013 Share Posted October 6, 2013 Anybody know voltage specifications of video output? I know it have 12V but don't know how many A? I hope it have 12V and 1A. Is this 12V directly connected from power supply in TI99/4a? What are specifications of this 12V. This way I can use voltage regulator to have 5V and 1A for CF7+. This way I modify connector and get power from there. Please help!!!!!!!! Why not do what @Stuart did in his post above: http://atariage.com/forums/topic/217365-voltage-for-cf7/?do=findComment&comment=2841825 ...lee Quote Link to comment Share on other sites More sharing options...
Manic1975 Posted October 6, 2013 Author Share Posted October 6, 2013 (edited) Stuart's solution suggest to make modification inside TI 99/4a and modification on computer case for wire. My wish was to use connector that is already on computer and have power needed for CF7+. Edited October 6, 2013 by Manic1975 Quote Link to comment Share on other sites More sharing options...
Stuart Posted October 6, 2013 Share Posted October 6, 2013 Anybody know voltage specifications of video output? I know it have 12V but don't know how many A? I hope it have 12V and 1A. Is this 12V directly connected from power supply in TI99/4a? What are specifications of this 12V. This way I can use voltage regulator to have 5V and 1A for CF7+. This way I modify connector and get power from there. Please help!!!!!!!! The video connector has a +12V output on pin 1, with GND on pin 6. The +12V regulator on the console power supply board is rated at 1A, and the console motherboard draws about 330mA. I can't imagine that the CF7 board + the CF card draws more than 100mA or so, so I reckon you'd be OK running a 5V regulator off the 12V supply to power the CF7. Make sure that the piece of plastic in front of the cartridge slot, which is directly above the 12V regulator heatsink, doesn't get uncomfortably hot. You may need a heatsink on your 5V regulator. Quote Link to comment Share on other sites More sharing options...
+hloberg Posted July 6, 2020 Share Posted July 6, 2020 On 10/5/2013 at 5:07 AM, Stuart said: Well since you ask ... ........................... Stuart. @Stuart you did this modification quite a few years ago. did it hold up? I'm thinking of trying it. Quote Link to comment Share on other sites More sharing options...
Stuart Posted July 6, 2020 Share Posted July 6, 2020 13 hours ago, hloberg said: @Stuart you did this modification quite a few years ago. did it hold up? I'm thinking of trying it. I only use the TI-99 occasionally and mostly use that cable to power the 32K sideport and TIPI, but the mod is still working fine. 1 Quote Link to comment Share on other sites More sharing options...
R.Cade Posted July 6, 2020 Share Posted July 6, 2020 (edited) Why isn't/can't the 5v on the side port be used to power the CF7? Is it not rated for enough amperage? I know it won't pass through the speech synthesizer. Is that the only reason for the secondary power design here? Edited July 6, 2020 by R.Cade Quote Link to comment Share on other sites More sharing options...
JB Posted July 6, 2020 Share Posted July 6, 2020 4 hours ago, R.Cade said: Why isn't/can't the 5v on the side port be used to power the CF7? Is it not rated for enough amperage? I know it won't pass through the speech synthesizer. Is that the only reason for the secondary power design here? As I understand things, it is rated for very low amperage as the pin exists specifically to power the speech synthesizer. It was designed to supply pretty much exactly that amount of current, and not one drop more. Quote Link to comment Share on other sites More sharing options...
+hloberg Posted July 6, 2020 Share Posted July 6, 2020 5 hours ago, R.Cade said: Why isn't/can't the 5v on the side port be used to power the CF7? Is it not rated for enough amperage? I know it won't pass through the speech synthesizer. Is that the only reason for the secondary power design here? there is a mod to the speech were you solder a bypass wire across the board so that the +5 is usable with other devices on the other side. I remember something needing this mod, but I can't remember what it was (oh well). but there isn't enough amps coming across that +5 from to console to run the NanoPEB device. Quote Link to comment Share on other sites More sharing options...
+hloberg Posted July 7, 2020 Share Posted July 7, 2020 on a related note at https://www.nanopeb.com/ he has a WiFi adapter for the nanopeb. is he selling this yet and has anyone bought one? Quote Link to comment Share on other sites More sharing options...
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