Hi people,
I'm new to the diystompboxes forum. Luckily came across the fact that I could build a mutron III clone from scratch -- awesome. I'm an electrical engineering soon to be graduate and figured the neutron while a more advanced project, I could handle it. Ironically my trouble begins with parts I need to purchase I got the PCB board from GGG & ordered the photocoupler from SBE but am having trouble with the part numbers for a lot of the resistors from mouser. Anyone have an updated part #list this would be so much easier than going through and hand selecting these.
On a design issue, with the power supply to the circuit I want to build it for use with a nine volt adapter any words of advice on modding the circuit to accomodate this? Thanks....
-Chris
Mouser (like most mail order places) periodically changes their numbering scheme.
What you want to do is rather than relying on someone else to get the numbers right, look at the parts list, extract the resistor value (i.e. 12 each 4.7Ks, 3 each 6.8Ks, etc.) then list that into whatever Mouser is offering today.
You want the specified resistor value in 1/4 W carbon film types. When I wrote up the Neutron, Mouser used "29SJ250-xxx" for these resistors, where "29SJ" was the vendor, "250" was the power in milliwatts, and "xxx" was the 5% resistor value, such as 1K, 2.2K, 10K, etc.
Give a man a fish and he has dinner; *teach* him to fish
and he will make the garage and kitchen smelly forever.
Thanks for the quick response. Does anyone have advice about modding the schematic to add a 9V power supply, is there a part I need(female plug). Please Advise, thanks
The 1/4 watt resistors most of us use are Mouser part # 291-(value). For noise problems, use 1% metal film.
The neutron has a 7660 charge pump for the +/ground/- voltages, so a 9V supply is ideal.
The most common 9V adapter is a 2.1mm centered jack, Mouser part # 163-4302. I specified a plastic female because it is generally bad news to get your real ground and 7660 ground mixed up together. (7660 runs in the audible range, c. 10kHz, I believe)
For the caps, etc., I'd pick up a new Mouser catalog. They just released a new edition, and the catalogs make for some informative reading.
Cool?
I don't have your electronics background but I just finished a neutron filter. I had problems with whining when I used the 7660 charge pump. If you encounter the same problem buy a maxim 1044 and connect pin 1 to the + supply.
peace,
James