AS3340 Experiments
Based on http://www.alfarzpp.lv/eng/sc/AS3340.pdf
Sourced through https://syntaxis.com.pl/en/voltage-controlled-oscilators/8-as3340-vco.html
| Stage | Detail | Status |
|---|---|---|
| create material | sch | done |
| pcb | done | |
| gerber | done | |
| production | ok | |
| produced | ok | |
| delivered | ok |
| Test | Detail | Status |
|---|---|---|
| Initial Inspection | Face | Looks good - nice alignment and finish |
| Initial Inspection | PCB | Several errors |
| Initial Technical Test | Several errors | |
| Initial Product Test |
| Test | Detail | Status |
|---|---|---|
| Product Test | ||
| Quality | ||
| Long Term Product Test | ||
| Power Draw |
- Sync circuit messed up in SCH
- Fine pot reversed
- D103 D104 should go to GND and + 5V
Move from breadboard to stripboard as breadboard is not stable in any way.
Quick mods to get started
- 820R -> 680R (-12v)
- 470R -> 680R (CV in)
- 24k -> 20k (Rz tracking serial res)
- 1k8 -> 2k (Scale)
- 1M5 -> 1M (+12v pull up FM in)
- 5k6 -> 4k7 (scale adj RT)
Works ok for feature validation - but sync and PWM adjustment circuits should be included - as well as level adjustment. Protection of the chip is also needed. 20K pot not needed.
http://www.alfarzpp.lv/eng/sc/AS3340.pdf
CC BY-NC-SA 4.0
CC BY-NC-SA 4.0
https://electricdruid.net/cem3340-vco-voltage-controlled-oscillator-designs/
CC BY-NC-SA 4.0
https://electricdruid.net/cem3340-vco-voltage-controlled-oscillator-designs/
available under - https://creativecommons.org/licenses/by-nc-sa/4.0/