JYE Tech Forum

I started by looking at the manual. Note that we're talking about the two PWM modes here, not either CW or sweep mode. In the PWM modes, as in the CW and sweep modes, just pressing the AMP button will let you change the amplitude, just like it does in the CW and sweep modes. This is documented in th...

As noted elsewhere, I'm trying to use the FG085 as a servo testing tool. It actually works very well - or at least has a great set of features for that. It will do everything a high end servo tester will do, and more, for not a lot more money. However, I have a problem with a winch servo, which rota...

I'm a bit leery of testing this, as I think it may have fried a USB hub. Maybe not, it was new and could have been a crib death. But that level of soldering is beyond my skills, so it may not matter. Any chance there's another way to test this? Checking the USB lines in an oscilloscope doesn't show ...

Any news on this? I can't really provide a pull request for the driver if there is no released software that works with it.

Correct, the backlight doesn't come on. I confirmed the voltages on pins 19 and 20, and checked for open traces from them. Everything seems fine. This LCD module has always struck me as suspect, as it's missing the markings the assembly instructions refer to. Any chance of getting a replacement for ...

I hooked up a bench PS for the servo, and yeah - it's drawing 5 to 40+ mAmps under normal use, but spiking to ~120 when it stalls. I've ordered some voltage regulators; the comment about "may need it" made me think this would work. Any chance on getting test point values for the USB issue?...

Not driving a motor power se, just a servo. The 50mA provided by an Arduino pwm pin works fine for most testing, though stalling one could be an issue. But you normally don't check that with a servo tester. Can I get that much power, or do I need to get an alternative source?

Well, if I can't use the user-generated waveform, maybe I ought to go back to the new firmware with better accuracy but breaks user-uploaded waveforms? Or have I misunderstood that? Clearly, something is shorted to the USB connector. If I plug the thing in with the FG085 turned off, my system sees t...

This is the one I posted pictures of in the "Counterfeit 062" thread. The voltages are: D3: 10.3 D7: 0.3 *** Q1 Left: 0.05 Q1 Top: 9.47 Q1 Bot: 9.51 C17: 0 **** Q2 Top: 0 **** Q2 Bot: 9.5 **** U2: 4.3 **** U1: 8.25 ***** C25: 0.6 C22: 2.6 TP1(?): 2.71 TP3:2.91 **** TP4: 9.49 TP5: 5.02 TP6:...

In that case, I think I have a dead lcd module. It doesn't light up at all. I'll post voltages tomorrow, but most of them seemed ok, though many were 1 volt higher than listed, which I assume is because I use a 10 volt ps. But for now, which side should the 20 pin header be attached to? The assembly...