| Products > Test Equipment |
| New (toy?) DSO+LCR meter - Fnirsi DSO-TC2 (june 2022) |
| << < (3/7) > >> |
| indman:
ARM MM32F103 RET6 - component tester WCH CH32F103 C8T6 - oscilloscope ;) |
| ledtester:
--- Quote from: indman on July 24, 2022, 08:14:39 am ---ARM MM32F103 RET6 - component tester WCH CH32F103 C8T6 - oscilloscope ;) --- End quote --- I couldn't tell if you were serious, but it appears you are correct. At the 3:00 mark this Russian language video asserts that the MM32F103 is responsible for the component tester and the WCH chip for the oscilloscope: FNIRSI DSO-TC2 - осциллограф + транзистор-тестер https://youtu.be/PXzY-pvd7OM?t=3m At that point there is a close-up of the PCB and you can see the triple pair of 680R and 470K resistors near the top and they are connected to the MM32F103: I'm curious what that chip in between the two MCUs is. |
| indman:
--- Quote from: ledtester on August 21, 2022, 03:07:19 pm ---I couldn't tell if you were serious, but it appears you are correct. --- End quote --- This became clear immediately after it was possible to read the marking of the chips.Because the CH32F103 C8T6 FNIRSI is also used in other pocket oscilloscopes. --- Quote from: ledtester on August 21, 2022, 03:07:19 pm ---I'm curious what that chip in between the two MCUs is. --- End quote --- RS2227-Analog switch https://datasheet.lcsc.com/lcsc/2202251530_Jiangsu-RUNIC-Tech-RS2227XUTQK10_C783419.pdf |
| CChin254:
Here are the chips used on the FNIRSI Digital Oscilloscope & Transistor Tester: (Image was from Dave Jones' Flickr account.) |
| snapper:
the replacement TC3 only has a 100-pin µC from which unfortunately the labeling has been removed :rant: But with the TC3, the designer must have run away with it. Why do you need almost 40 transistors in the measurement circuit? |
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