i really appreciate you posting all of these thoughts, thank you!!
now i feel a bit silly for always using a 78Lxx regulator just because all the boutique builders do
Search found 39 matches
- Sun Jul 12, 2020 11:49 am
- Forum: FV-1 hardware questions
- Topic: Some things I've learned about the FV-1
- Replies: 19
- Views: 33523
- Tue Jun 30, 2020 8:54 pm
- Forum: Algorithm development
- Topic: EQD Aferneath
- Replies: 4
- Views: 11010
Re: EQD Aferneath
any luck with this? i wonder how close you can get just by adjusting the clock rate of one of the stock reverbs.
also, worth noting that both eqd and pedalpcb are using the simple clock oscillator circuit from the knowledge base: http://www.spinsemi.com/knowledge_base/xtal.html
also, worth noting that both eqd and pedalpcb are using the simple clock oscillator circuit from the knowledge base: http://www.spinsemi.com/knowledge_base/xtal.html
- Sat May 23, 2020 12:17 pm
- Forum: FV-1 hardware questions
- Topic: Mid Reference Capacitor
- Replies: 17
- Views: 19516
Re: Mid Reference Capacitor
interesting! do they use the same larger values for REFP?
speaking of commercial products, i did some poking around and zcat pedals use MLCCs for both MID and REFP: http://www.effectsdatabase.com/model/zcat/polyoctaver
speaking of commercial products, i did some poking around and zcat pedals use MLCCs for both MID and REFP: http://www.effectsdatabase.com/model/zcat/polyoctaver
- Fri May 22, 2020 11:26 am
- Forum: FV-1 hardware questions
- Topic: Mid Reference Capacitor
- Replies: 17
- Views: 19516
Re: Mid Reference Capacitor
oh i see! tantalum does seem safest, as is used on the dev board. though personally i'm going to try some standard standard ceramics on my next build to find out for sure, like frank suggests also, you can get 1uf C0G caps for the low price of... $15 each :lol: https://www.mouser.com/ProductDetail/K...
- Tue May 19, 2020 2:23 pm
- Forum: FV-1 hardware questions
- Topic: Mid Reference Capacitor
- Replies: 17
- Views: 19516
Re: Mid Reference Capacitor
oh that's great to know! any excuse to avoid an electrolytic is a nice help.
i doubt the microphonics would matter, since it's unrelated to the signal path and connected to ground. we all use ceramic caps for the DVD+AVD pins and for the crystal, but that doesn't cause any trouble.
i doubt the microphonics would matter, since it's unrelated to the signal path and connected to ground. we all use ceramic caps for the DVD+AVD pins and for the crystal, but that doesn't cause any trouble.
- Sun Apr 19, 2020 11:42 am
- Forum: FV-1 hardware questions
- Topic: switch pin resistor values
- Replies: 2
- Views: 6548
Re: switch pin resistor values
good to know, thanks very much!
- Sat Apr 18, 2020 10:38 pm
- Forum: FV-1 hardware questions
- Topic: switch pin resistor values
- Replies: 2
- Views: 6548
switch pin resistor values
in the schematic on the fv1 manual, the resistors connected to the S0, S1, S2, and T0 pins are all 20K. i'm curious as to why this value was chosen, and how important it is to use this specific value? i figure 18K or 22K would be fine, but what about values like 10K or 50K? Assuming these are just f...
- Sat Apr 04, 2020 11:16 am
- Forum: Algorithm development
- Topic: unconditional SKP
- Replies: 8
- Views: 11146
Re: unconditional SKP
I wish this was better documented, I can't believe I went so long without seeing this! It really makes my life easier I was a bit nervous about using this so i wrote some slightly silly test code to make sure it really does skip, and really does preserve the ACC value. Seems to work perfectly! ; if ...
- Fri Apr 03, 2020 11:13 pm
- Forum: FV-1 software questions
- Topic: Loading values with RDFX
- Replies: 2
- Views: 6194
Re: Loading values with RDFX
Hi Frank, thanks very much for clearing that up! I found it on this page, at the end of the notes for RDFX: http://www.spinsemi.com/knowledge_base/inst_syntax.html#RDFX I also found a typo later on the same page, but for WLDR: http://www.spinsemi.com/knowledge_base/inst_syntax.html#WLDR "The fr...
- Thu Apr 02, 2020 5:50 pm
- Forum: FV-1 software questions
- Topic: Loading values with RDFX
- Replies: 2
- Views: 6194
Loading values with RDFX
Hello! I'm having trouble understanding RDFX. According to the syntax and instructions page,we can use it to clear the acc and load a register by writing "RDFX reg,1" The formula for RDFX is ACC=[reg]+(ACC-[reg])*K1 If K is equal to 1, we just get [reg]+(ACC-[reg]), and as far as I can tel...
- Mon May 21, 2018 9:59 am
- Forum: FV-1 hardware questions
- Topic: Best gain for input buffer
- Replies: 5
- Views: 6451
- Tue Oct 24, 2017 1:18 pm
- Forum: FV-1 software questions
- Topic: Formula for Ramp LFO Frequency in Hertz
- Replies: 1
- Views: 3026
Formula for Ramp LFO Frequency in Hertz
Hello! I know that the frequency of ramp LFO's are set by the values -Â16384 – 32767. What is the formula to convert a frequency in hertz to this value range?
I found the formula for the sine LFO in the "Basics of the LFOs in the FV-1" pdf, but couldn't find it for the ramp LFO.
Thanks!
I found the formula for the sine LFO in the "Basics of the LFOs in the FV-1" pdf, but couldn't find it for the ramp LFO.
Thanks!
- Thu Aug 03, 2017 6:43 pm
- Forum: Algorithm development
- Topic: tap tempo snippet
- Replies: 84
- Views: 1170740
- Wed Jun 07, 2017 10:02 am
- Forum: FV-1 hardware questions
- Topic: Crystals wont oscillate
- Replies: 7
- Views: 6589
You seem to have sorted out your problem, but I thought I'd add that I've built over a dozen pedals using Tayda Crystals and they all work fine. Tayda lists the required Load Capacitance as 12.5pF (and the datasheet lists 9pf, 10pf, 12.5pf), and I've used both 10pf and 15pf capacitors which worked f...
- Mon Jun 05, 2017 11:15 am
- Forum: FV-1 hardware questions
- Topic: Best +3.3v regulator for FV1?
- Replies: 2
- Views: 4797