Tools, Tones and Toys for Guitarists
Here’s a cheaper-to-build alternative for MAX1044/ICL7660 voltage doubler charge pump. According to the documentation, this puppy is capable of 30mA of output current, so it’ll be enough for any stompbox use. Circuit isn’t as small, as using NE555 timer chip will need couple of resistors and caps to get the job done. Still, simple and … Read more
Here’s a cheaper-to-build alternative for MAX1044/ICL7660 voltage inverter charge pump. According to the documentation, this puppy is capable of 30mA of output current, so it’ll be enough for any stompbox use. Circuit isn’t as small, as using NE555 timer chip will need couple of resistors and caps to get the job done. Still, simple and … Read more
Well.. This was requested, and first i thought that nah. Not gonna do it. But after thinking about it for a few seconds, it didn’t feel like that bad of an idea. So i drew up simplest “original” design i could ever do. The idea is that you attach a cable to two shielded jacks. … Read more
Not a lot of info around, but this one is apparently simple little box that allows you to play at nighttime – without disturbing the missus. Seemed like a quick and painless schematic, but took me a few hours to finish… Sort-of-requested by PaulR. 🙂 I think i won’t be posting anything more today. 😀
First i thought i’d just post this after the 2 channel version to the same post – but the permalink to that post is “2-channel-mixer”. So. Sorry for “double” post, but here’s one for NoNE. Here’s the revised version with more gain/level from the mixer opamp. I’ll revise the 2 channel version too…
I needed something like this myself, so why not share. I’ve been thinking about building a console for our keyboardist. She has this amazing wooden 70’s Casiotone that i dugged up from trash and it worked. It’s default sounds are pretty bad, but using the organ sound and putting it through Skreddy Lunar Module Deluxe … Read more
I’m lazy and use a Peak DCA55 to measure transistors which will automatically give you the leakage reading for germanium with the added advantage of identifying the pins for you so you don’t even have to refer to the datasheet. This is an alternative from information posted by RG on the Geofex website and will … Read more
So moving on from RG’s JFET matcher which measures VGS (or more precisely, the voltage at which RDS is 10K) , this is another version by Sebastian from runoffgroove which allows you to measure VP and IDSS depending on the position of the switch. The centre off position should be used to insert and remove … Read more
This should be a useful little circuit for a few people and will allow you to match JFETs VGS (or more precisely, the voltage at which RDS is 10K) when required in some phasers etc. Based on the information posted by RG here which should explain how everything works. Compact version with onboard sockets suitable … Read more
I’ve done a few layouts using this method, but thought it may be useful to include a little daughter board which will allow you to easily convert any existing positive ground effects to (daisy chainable) negative ground. Just de-solder the supply and ground wire from the existing board, and solder to this board, then take … Read more