Built this without the zener voltage diode and works great. From an early ray wilson design ... Loop back from ad out with switch to pin 2 555 and envelope repeats ! I didnt need a resistor , just direct feedback. Now we have looping adjustable ramp up / down and anything between lfo style envelope too 👍
5 лет назад
Thanks for the tip on a simple mod. I have loop function on my AR already but might do this on the ADAR aswell. (Only problem is panel space for another switch...) 😅
Without an resistor, this loop is drawing 40mA. Depending on the output impedance of your PSU, this can cause problems. I added an 5k resistor and it still works but without power spikes
Enjoying these vids quite a bit! I'll have to build some of the modules you've done for my own DIY system. You're way ahead of me and I started building it months ago!
5 лет назад
Sitting down and “boot camp”like I did that week did a big difference. Now I am just moving along by the momentum and NEED for that next module. :D hahahaha
I build the Thomas Henry design AD/AR which is also on the Electro-Music forum. It also uses the 7555 and works really well too. I guess they're not that different.
4 года назад
I think this one is really similar to that one. It is a very good design. TH at his best. :)
Ok, ultra-newbie question here - what type of switch should I order for this? From what I can tell it's a DPST switch, correct? With the ones I have found online, it seems like most have 6 pins. If so, how is this wired then? Sorry for such a basic question, but the switch is really throwing me off. Thanks!
I've tried to follow along with you on these and have gotten way behind. Just learning electronics. These are great vids on the musical side of electricity. I remember when the Moog synth was born, which tells my age. I remember in one of your vids that you needed more power. Did you remedy that problem? I'm still good with the supply from your schematics, so far, but I was wondering if you had to build a different supply.
3 года назад
That is great! Don’t worry if you get behind, the videos won’t go anywhere. As for power I did beef it up a bit. It is possible to just build on the original one and basically add more capacitors and if one wants to add 5v. It is discussed in a video as you say if you watch the playlist it is the one about ripple. Just keep on building and you’ll get there. :). I have slowed down a bit too. The first week was really speedy, but now I have had to slow down and also I experiment a bit more which takes time. ;) Keep it up!
With a 556 chip instead you could make a dual module!
5 лет назад
Yep. But I am unsure if they make them anymore? When I bought components for this modular I only found 555s that was in production. It is still possible to buy them on eBay for example but not “new”. Two 555 would work aswell. :)
@ You're welcome! I found that site several years ago when I wanted to build an Atari Punk Console. Of course... shipping takes ages because it's coming from China, but the prices are fantastic!
cheap? not really :) , i will show you how the pros do it ;D ___10pcs Ne556 || 1,03$ = 10,3c/piece www.ebay.com/itm/10PCS-IC-NE556N-NE556-ST-TI-OSC-TIMER-DUAL-DIP-14-200mA/202263877154?epid=1345935677&hash=item2f17ddd622:g:JvIAAOSw-fNarQNp ___50pcs Ne556 || 4,34$ = 8,68c/piece www.ebay.com/itm/50PCS-IC-NE556N-NE556-ST-TI-OSC-TIMER-DUAL-DIP-14-200mA/253037587297?hash=item3aea372b61:g:pNoAAOSwu59ZYuwT:rk:54:pf:0 ___100pcs Ne55 5 || 3,21$ = 3,21c/piece (best option of all) www.ebay.com/itm/100PCS-NE555-555-DIP-8-IC-Timers-NEW-GOOD-QUALITY/181846605346?hash=item2a56e6fe22:g:KVQAAOSwISRacuDS:rk:13:pf:0
