Activity for Pete W
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280152 | Initial revision | — | over 3 years ago |
| Article | — |
PWM Triangle Wave from two clocks What follows is a proposed concept of a simple (in principle!) way to generate a fixed-amplitude triangle wave, using two clocks, an XOR gate, and not using any processor cycles. It is practical in the low-mid-100-Hz ballpark, with typical mcu clocks. Motivating application is dither waveform for ... (more) |
— | over 3 years ago |
| Comment | Post #280139 |
Ok, will try to do that! (more) |
— | over 3 years ago |
| Edit | Post #280137 |
Post edited: |
— | over 3 years ago |
| Edit | Post #280137 | Initial revision | — | over 3 years ago |
| Question | — |
is this too obvious for a post? I recently realized something blindingly obvious that I'd overlooked for a few years - that I can generate a servicable PWM triangle wave from a micro by using two PWM outputs with timers set to slightly different frequency. (i.e. no processor load whatsoever, no analog circuitry other than the filte... (more) |
— | over 3 years ago |
| Comment | Post #279580 |
thanks. PS I think I misspoke, the '431 regulator works in some ways like an NPN. (the LM4041 works like a PNP) (more) |
— | over 3 years ago |
| Comment | Post #279580 |
Very nice. Minor note regarding specific TL431 part - 2.5V is a pretty big drop for the sense resistor. The TLV431 (and many other '431 types) have 1.25V. I think an NPN could also be used in the same position to reduce that further. (more) |
— | over 3 years ago |
| Comment | Post #279886 |
@leroy .. is a 0402 series element big enough to prevent arcing at 4kv? (more) |
— | over 3 years ago |
| Comment | Post #279962 |
Put the current limiting inside the loop, and the loop gain will lower output impedance seen from ADC. With caveat that for large/fast input swings, the OPA output might hit its limits sooner with more series resistance in the loop there (depending on the load of course). (more) |
— | over 3 years ago |
| Edit | Post #279884 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Is ESD overhyped? Real life example. The machine shop of the company where I work has HAAS VF2 milling centers. At 3.5 tons, you'd figure a big enough to warrant some care and respect. The favored method of data transfer is USB stick. On a winter day, the cnc programmer picks up enough static on the short walk ... (more) |
— | over 3 years ago |
| Edit | Post #279881 |
Post edited: |
— | over 3 years ago |
| Edit | Post #279881 |
Post edited: |
— | over 3 years ago |
| Edit | Post #279881 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Moving average that uses less memory? A bit of a tangent, but in mcu firmwares, higher order filters can also be implemented directly with biquad sections. More work to implement vs single pole, but very reusable. Although to be honest the benefit over cascaded single-poles is marginal, so there may be other topics, like loop stability, ... (more) |
— | over 3 years ago |
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