[???] Rigol DS1052e/d power supply DC voltage + add battery pack? - Page 1
Forum section: electronics / general

author: allenpan
author_rank: Contributor
timestamp: October 18, 2016, 09:05:42 pm
content: [] Rigol DS1052e/d power supply DC voltage + add battery pack?has someone add battery pack to the rigol yet?if not, whats the voltage require or supplied by the AC-> DC build in PSU?

author: Andie
author_rank: Contributor
timestamp: July 21, 2019, 01:25:39 am
content: Hello everyone,Quote from: allenpan on October 18, 2016, 09:05:42 pmallenpan, after three years you have probably stopped listening to your thread. If not, I hope that the following is helpful.Others posted similar topics -https://www.eevblog.com/forum/projects/rigol-ds1000-series-battery-power-ideas/msg58506/#msg58506https://www.eevblog.com/forum/testgear/battery-pack-for-rigol-ds1054z/msg717702/#msg717702- and I recently did a related conversion to a DS1052E.My modification doesn't add a battery, but enables the device to be operated by any DC 9...36V source capable of delivering 14W. Not only allows this battery operation, but it also disconnects the inputs from protective earth - which was my main goal.Since the modification includes replacing the original power supply, the first step was to determine the power requirements of the oscilloscope board. While inspecting the power supply board I discovered that my initially assumed pin numbering at the ribbon cable between power supply and the oscilloscope board is likely wrong and it should probably be reversed. I was not quite sure and to avoid confusion, I stuck to my first assumption (pin 1 closer to the rear of the oscilloscope board). Please consider this, when using the following table. I recommend that you determine the pin order by yourself, which is easily done by locating the connected pins on the GND, +3.3V, +6.5V rails.Pin assignment oscilloscope board, power connector:.---- 1 GND| 2 /BL_EN| 3 AC 3Vpp| 4 -10V -0.2A|---- 5 GND| .-- 6 +3.3V 1.1A| '-- 7 +3.3V|---- 8 GND| .-- 9 +6.5V 0.7A| '-- 10 +6.5V| 11 +15V 0.1A'---- 12 GNDThe scope needs six voltages:+3.3V 1.1A+6.5V 0.7A+15V 0.1A-10V -0.2AAC 3Vpp (for line trigger)+6V (for LED backlight)My DS1052E uses a LED backlight which is powered directly from the power supply board. The board is as well prepared for an CCFL-inverter, but the needed parts are not populated. The oscilloscope board switches the backlight on by pulling pin 2 to GND - no need for that after the conversion, so pin 2 at the oscilloscope board can be left open. The operating current of the LED backlight is 0.1A at a forward voltage of about 6V. After the modification I derived this supply from the 6.5V rail via a 3.3 Ohms resistor. Ok, not the best solution, but it works well enough, with acceptable variation due to LED temperature.If you don't need the line trigger functionality, you can refrain from supplying the line trigger signal. If this signal is missing, the scope works anyway (of course except line trigger capability). Earlier, while doing the same conversion to a Tektronix TDS220, I discovered that this scope didn't pass the self test, when not provided with the line trigger signal. Although I was allowed to acknowledge the error message and use the oscilloscope, I'm not tough enough to constantly read the word "FAILED" when powering up an oscilloscope. So I added a quartz based 50Hz source to the TDS220. I used the same solution on this Rigol conversion.What about the fan? I didn't take power measurements prior to the modification, but I estimate that the power supply's loss is in the range of the oscilloscope board's power consumption. In other words - if you plan battery operation, get rid of the original power supply. And by this having halved the power consumption of the device, the need for a fan is questionable. After observing the heat distribution across the oscilloscope board, I decided to omit the fan.The new power supply should be isolated, so I chose an isolated DC/DC converter from 9...36V input to 12V output. From there, several off the shelf adjustable and fixed buck and boost converters provide the desired voltages.Now, the oscilloscope can be powered from a battery or a wall wart via the connector at the top. The lower connector is currently unused - I put it there to ease future modifications.Regards,Andreas

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 21, 2019, 02:44:23 am
content: I modded my GDS-1062A with an internal 3S pack built from old laptop batteries, I forgot exactly how I did the power circuits other than that it involved several DC/DC converter modules and replaced the stock PSU with a charger. I didn't do anything with the line trigger yet since I rarely if ever use it, but most likely if I do get around to it, I'll add a PLL that locks to the mains input if it's connected or an electromagnetic field in that frequency range if it's not.

author: allenpan
author_rank: Contributor
timestamp: July 23, 2019, 01:43:39 pm
content: hehe, i still following this thread, i did not have time to complete that project...

author: amorosik
author_rank: Newbie
timestamp: December 11, 2022, 11:00:03 am
content: Hi Andreas, i do not think there is a need to compliment because the realization speaks for itselfIs it possible to know which components/modules you used to rebuild the power supply section?Is there an electrical diagram that makes it easier for those who are not super expert to understand how to do it?

author: tom66
author_rank: Super Contributor
timestamp: December 11, 2022, 12:31:54 pm
content: For any DS1xx4Z owners, or similar models, I found the scope works absolutely fine with 50V DC applied across live and neutral. No deleterious behaviors noted. It draws about 12W, which is roughly the same as the AC power draw. I built a simple boost converter using a module on eBay to run it from a 12V cigarette lighter.