Recommendations welcome.
Not finding a solution that takes both the + and - 15V DC from the Meanwell PS and converts to the +24V DC necessary for the Insert boards.
Thanks in advance!
Powerable from +/-15V supplies using an external 7824 or LM317 regulator
Re: Powerable from +/-15V supplies using an external 7824 or LM317 regulator
Found this, which was super helpful; looking for an example of the implementation, if possible:
“Re: Mid Side M-S Matrix Construction Information
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Post Mon May 16, 2016 3:49 am
[...]
The bypass board is 24V (using 12V relays).
The coil connections float and are not tied to any ground.
Thus, if you only have +/-15 to +/-18V available you can sub-regulate the available 30 to 36V down to 24V using a 7824 or LM317 regulator.
In this configuration the regulator IC and relays common to the -15V (or -18V) rail.
The +15V rail (+18V) connects to the regulator input.
The regulator output provides +24V relative to the minus supply rail.
The relay coils "see" 24V and the relay current returns to the negative supply rail instead of 0V.
[...]”
“Re: Mid Side M-S Matrix Construction Information
Report Quote
Post Mon May 16, 2016 3:49 am
[...]
The bypass board is 24V (using 12V relays).
The coil connections float and are not tied to any ground.
Thus, if you only have +/-15 to +/-18V available you can sub-regulate the available 30 to 36V down to 24V using a 7824 or LM317 regulator.
In this configuration the regulator IC and relays common to the -15V (or -18V) rail.
The +15V rail (+18V) connects to the regulator input.
The regulator output provides +24V relative to the minus supply rail.
The relay coils "see" 24V and the relay current returns to the negative supply rail instead of 0V.
[...]”
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Re: Powerable from +/-15V supplies using an external 7824 or LM317 regulator
Good find. Exactly what you need to do.hlarue wrote: ↑Fri Nov 20, 2020 5:19 pmFound this, which was super helpful; looking for an example of the implementation, if possible:
“Re: Mid Side M-S Matrix Construction Information
Report Quote
Post Mon May 16, 2016 3:49 am
[...]
The bypass board is 24V (using 12V relays).
The coil connections float and are not tied to any ground.
Thus, if you only have +/-15 to +/-18V available you can sub-regulate the available 30 to 36V down to 24V using a 7824 or LM317 regulator.
In this configuration the regulator IC and relays common to the -15V (or -18V) rail.
The +15V rail (+18V) connects to the regulator input.
The regulator output provides +24V relative to the minus supply rail.
The relay coils "see" 24V and the relay current returns to the negative supply rail instead of 0V.
[...]”
You need a 7824 regulator with heatsink.
The regulator board's ground should not have a connection to chassis.
eBay would be a good place to look.
Connect the Meanwell's +15V output to the 24V regulator Vin.
Connect the Meanwell -15V output to the 24V regulator Gnd.
The 24V "Gnd" connection is really at -15V and will be the switch common and will also connect to the insert board Relay Gnd pad.
The regulator board +24V output will connect to the Insert Switcher +24V connection.
The -15V line
https://ka-electronics.com
Plandemic Series: "Pland3mic - Indoctornation" https://proaudiodesignforum.com/content ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://proaudiodesignforum.com/content/Plandemic.mp4
CDC: "For 6% of the deaths, COVID-19 was the only cause mentioned. For deaths with conditions or causes in addition to COVID-19, on average, there were 2.6 additional conditions or causes per death." https://www.cdc.gov/nchs/nvss/vsrr/covi ... /index.htm
Plandemic Series: "Pland3mic - Indoctornation" https://proaudiodesignforum.com/content ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://proaudiodesignforum.com/content/Plandemic.mp4
CDC: "For 6% of the deaths, COVID-19 was the only cause mentioned. For deaths with conditions or causes in addition to COVID-19, on average, there were 2.6 additional conditions or causes per death." https://www.cdc.gov/nchs/nvss/vsrr/covi ... /index.htm