Upgraded version of 6-way benchmark

This is the deficiencies and improved upgraded version of the last open source benchmark. It can only be higher, stronger and better!

         The benchmark for open source last time was appearance, and this time the appearance and performance have been enhanced again!

Because the output voltage of the ADR01BRZ benchmark is 10V, which was not considered last time, this time a 1N4148 boost voltage was added to the gnd pin of the benchmark to make the output reach 10.6V. This ensures that the 10v of the 6 sets of benchmark voltages will not be used higher than 10V. Cut off the top.

LTC6655-1.25V voltage divider 1V circuit:                  10V output reference voltage circuit, obtained by amplifying the 1V voltage:          

Four sets of reference voltage divider circuits:         

Four sets of reference voltage emitter follower circuits:

     The reference motherboard uses five OPA735 high-precision and low-offset precision operational amplifiers. The high-precision reference ADR01BRZ is also used for power supply of the operational amplifiers. This reference can output a current of 10MA, which is sufficient to power five operational amplifiers. The 1V reference voltage is It was obtained by dividing the voltage using the LTC6655-1.25V reference chip. Because I used a 1:7 resistor for voltage dividing and amplification before, I found that such a resistor could not be purchased, so I used seven resistors in parallel last time, which would cause the noise to become larger. This time, after dividing the voltage into 1V with a resistor, it is then amplified 10 times by an op amp through a 1:10 resistor. The output 10V high-precision voltage is then divided by 5 resistors with the same resistance value. The four divided voltages pass through Operate the radiator output, thus eliminating the influence of the external measurement voltmeter on the output reference voltage of each group. The power supply inputs of each IC in the circuit are filtered by bile capacitors, and the 6 sets of output reference voltages are protected by ESD diodes. This reference board has been tested and the voltage accuracy can reach 20UV in a non-constant temperature environment, which has exceeded my expectations. I originally wanted to have a reference motherboard coated with 704 silicone grease. In that case, the temperature drift would be lower, and it should be able to drop to 15uV!

     The following is an upgraded version of the 6-channel benchmark battery pack board. It uses the CN3300 lithium battery boost charging chip and uses four 3200MA 18650 batteries. The power is enough for 320 hours of use. It has an external lithium battery pack backup charging input and a TYPE-C charging head. Input, easy to carry, using lithium battery over-discharge and over-shoot protection chips to ensure no over-discharge and over-shoot. This is the supporting battery board project link: https://oshwhub.com/dian-ya-ji-zhun/dian-chi-zu-ban Baseline motherboard:  PCB after welding Battery pack board:  Baseline motherboard: Panel: Front:

Digital Home posting link (hyperlink included): https://www.mydigit.cn/forum.php?mod=viewthread&tid=146192&page=1&extra=#pid3972221%E3%80%81

Complaining about the WWW.DT830.COM forum, but it can’t post hyperlinks? Link to the DT830 Instrument Forum, there are more pictures, mobile version link: http://www.dt830.com/forum.php?mod=viewthread&tid=4124&page=1&extra=&mobile=2#pid60717

Computer version link: http://www.dt830.com/forum.php?mod=viewthread&tid=4124&extra=page%3D1%26filter%3Dsortid%26sortid%3D11

Test video link: http://v.youku.com/v_show/id_XNDYzNzM5OTY0NA==.html?x&sharefrom=android&sharekey=5c14a47301e703e998291a88dc05dd0e5