#Tinajas

[trukutruku]

[richie-so]

Día de #tinajas con mis #babies 🌈🌦️ (en Caburgua, Araucania, Chile) https://www.instagram.com/p/CooOY1kMuUCahAfOySzXShvd55lgD3h7FZokSI0/?igshid=NGJjMDIxMWI=

[humongouscasheaglebagel]

[utahunfiltered]

There’s water in the desert if you know where to look! A chain of tinajas (there were thousands of gallons of water in these!) with a tiny marsh at the very end. It was a super hot day (104 degrees F). Some of the tinajas were deep enough to soak in and cool enough to help with the extreme heat. Somewhere near Crescent Junction, north of Moab. July 30, 2022.

[brb-on-a-quest]

Hi!!! What languages are you learning in Duolingo??? <3

hello!!!! 💜

I’ve been studying Spanish on and off duolingo for a couple of years now (my major in university), Irish Gaelic was an addition after I got addicted to Irish music one summer and recently started German after insta decided that I knew German. I’m debating about adding French for the same reason but also the not knowing is pushing me to get better in Spanish.

Will say after doing duolingo for over a year straight I’m very much a bit burnt out bc it hasn’t been the most helpful in terms of Spanish but I’m also not stopping bc I have too much on the line and could never beat the owl in a fight

[sspacegodd]

Free-range organic psychedelia.

[klaudia2646]

2nd stop, we ate lunch at La Tinaja in Jarabacoa.

[taperwolf]

A while back, Sam over at Look Mum No Computer did an examiner/recreation of the early 1970s automated music system, the Psych-Tone. Designed by the legendary Don Lancaster and first appearing in the February 1971 issue of Popular Electronics (and a kit made available by SWTPC, the Southwest Technical Products Corporation), the Psych-Tone used early logic chips and transistors to play a number of different tunes based on the setting of various switches and potentiometers.

The core of the circuit is a pseudorandom sequence generator — a circuit that creates a single random sequence of 0s and 1s, and keeps it circulating. With six stages in the chain, the sequence is 63 steps long. The three selector knobs each pick where in the chain to listen, and when that value is 1, pass that through a potentiometer to set a partial pitch. The three partial values sum together to make a tune, which is played on an organ-like tone generator.

In explaining the device, Sam built a new version of the machine's sequencer section, using slightly newer chips and adding some LEDs to illustrate the functioning, for folks to play on synths with at his This Museum is (Not) Obsolete. Which got me thinking about doing something similar myself — building essentially the note generator as a random sequence creator for Eurorack.

Fortunately, in addition to Sam's video and the original article, Lancaster wrote up how to build these PRSGs, in varying lengths, in his book CMOS Cookbook; where the original used individual flipflops, this updated circuit lets you use shift registers (since one of those is effectively an internally-connected string of flipflops). To boil things down, by feeding certain of the output values back to the input through an XOR gate, a n bit shift register can cycle through a 2^(n-1) sequence, which can then be used in a number of different ways — basically anywhere you want something that's effectively random, but potentially repeatably so.

The circuit diagrams and tables given there have let me breadboard up something that I haven't yet tested, for a few reasons.

First, I'm feeling a little unsure as to how long to make the sequence. Obviously, if you make the sequence too short, it's too repetitive, but conversely, if it's too long, it's not going to be distinguishable from randomness. The original's length of 63 steps seems short, but the breadboarded circuit right now is set up for not 6, but 16 stages, which would yield a sequence length of 65,535 steps, which might be a bit much.

That's not more than something to work out in testing, though, which leads to reason two. Like with Sam's version, the one on the breadboard is meant to show the internal workings by using LEDs. And I've got a couple of nice, compact 10-segment bar graph LED displays on the breadboard, each one wired to 8 of the 16 stages. But LEDs can't handle just being plugged into a raw voltage; each one needs a current-limiting resistor to keep it from burning out. And while I could hook up 16 separate resistors on this breadboard, I don't wanna. I have — someplace around here — a nice little assortment of resistor arrays, chiplike affairs where eight identical resistors all connect to the same ground pin. Once I find them, I can watch the blinkenlights and get a better picture of the kind of sequences I'm dealing with.

(Your basic pseudorandom sequence generator goes in one direction, while the Psych-Tone can also run the sequence in reverse; while the section from CMOS Cookbook is a little terse about how that's done, I think I have that figured out too. Unfortunately, changing directions on the fly requires some complicated switching, so it's hard to do with just hardware — though I just found a giant chunky switch in my collection that could be coerced into selecting forwards or backwards on three different sequence lengths — say, switching between 8, 12, and 16 stages? Hmmm.)

The actual translation from discrete stages of either 0 or 1 works first by selecting one of the stages, and connecting it to a potentiometer, wired as a voltage divider. When the stage is at 0, the pot's output is still 0v. But when the stage hits 1, the pot outputs a voltage between 0v and the "high" voltage level of the circuit, depending on where the knob is set. With just that, you've got a two-note output. If you add another selector with its own pot, and add the output voltages together, you've suddenly got four distinct values: 0v when neither is a 1, the ratio from the A selector when only it has a 1, the ratio from the B selector likewise, and A+B when both have 1s. Go to three selectors and you've got 8 values; four will get you 16 values.

(Well, assuming that A+B doesn't exactly equal C, or some similar arrangement that would reduce the actual possible values, and I'm intending to make a constant 1 selectable as well, so you could use it for tuning or as an offset. Because of how Eurorack tuning works, if you have A-C on different stages and D is always 1V, then the notes would be the same 8 as those for A-C but up one octave.)

Anyway. I am overexplaining a project that's barely begun, and I've been doing that for several hours while I should be trying to sleep, neither of which is a good sign. Perhaps tomorrow I'll find those resistor arrays and at least get things blinking.

[ateneomuseoutoplia]

Trabajos del alumnado de cerámica y arqueología o diseño en la escuela cerámica de Madrid. La Tinaja/ Príncipe Pío.

[taperwolf]

A few more of his books —

My copies of the Micro Cookbook and Active Filter Cookbook are autographed; I used to occasionally buy parts from Don on eBay and picked up the books on one of those orders.

(I've got a partially-built musical project, a shift register-based random sequence generator, intended for Eurorack, that's conceptually based on his classic "Psych-Tone" synthesizer; I need to get back to and finish it.)

[curvybeastt]

Un poco de tinaja pa este frío

[bestanimal]

I must submit some of my scaly babies for the vote.

My 10 year old plecostomus Snowflake I got him in middle school and he’s 18 inches long. Pleco’s are armored catfish and can actually walk some on land (I’ve seen in experiments but never tested it with Snowflake obviously.) My old boy actually wasn’t very friendly until he turned 8 then he came out of hiding and earlier this year started taking food from my hand. He also discovered he likes to be petted.

Nessie is an African ropefish, she has a turtle dock and stopped jumping once I got it for her. Ropefish are cousins of Bichir, normally nocturnal and actually come on shore at night to hunt slithering like a snake. Nessie loves attention and pets But will try to bite my mom 😂 she’s not happy and calls favoritism.

My last entry of oddball fish are Mexican eyeless/blind tetra. Some tetra retain small undersized and I working eyes as a recessive trait while the rest reabsorb their eyes. Two of my male cave tetra retained their eyes Ozark and GreyEyes. My other three, Linville and Cryptotora (my two girls) and the second biggest male Tinaja do not have eyes. Even without eyes that doesn’t mean they can’t see, they use a combo of things including a specialized lateral line that can sense water pressure changes, a system of photographic memory to memorize and mentally map out their environment, and they have a gland on top of their brain that can still sense light. They also communicate verbally with a series of clicks and in the wild they have developed shoal and cavern specific accents. These guys will eat anything and see the world with their mouths so they should only be kept with each other.

Feesh!

[humongouscasheaglebagel]

[tratame-suavement3]

debería estar en una cabañita con tinaja y no aquí en mi cama

[have-you-seen-this-animal]

I have Mexican eyeless cave tetra if you do a poll for them may I enter in a photo of my scaly babies? Ozark, Tinaja, Cryptotora, Linville, and Grey-Eyes (I know he breaks the cave theme names but my little “eyeless” cavefish guy kept his eyes, they are grey and don’t work to my knowledge but he’s got them). 😄

You're always welcome to attach photos to your request (hopefully I have that enabled). Definitely please reblog with a photo of your tetras!! This poll is specifically about the blind form, although there is a normal form.

[waltfrasescazadordepalabras]

Cuento del Emir.

He tenido un sueño muy extraño, soñé que era el hombre más rico de la Tierra, y concurría a una enorme feria donde podría comprarse todo lo comprable, o mejor aún, todo lo vendible. Llegaba yo a ese lugar en un carruaje fastuoso rodeado por varios servidores obsecuentes y la gente me admiraba y aplaudía. Recorrí uno por uno los puestos de aquel mercado. Me ofrecieron bienes y dones dispares. Hubo quien me ofertó joyas fabulosas, con diamantes engarzados en oro. Hubo quien vendía bellísimos corceles blancos, o esclavas esbeltas y cálidas, o tinajas repletas de vino añejo, o espadas forjadas en acero toledano, con empuñaduras adornadas con rubíes. Con esa fantasía que yo poseía en el sueño, podría haber comprado la feria integra. Pedí hablar con el mercader mayor, con el dueño de todo eso y le dije que deseaba comprar la vida de mis seres queridos ya muertos. El mercader me respondió que era imposible porque la vida no tiene precio. Propuse luego comprar la luz para los ojos de un amigo ciego de nacimiento, y me explicó que tampoco eso se vende. Se sucedieron en mi reclamo el amor auténtico para los solitarios, el consuelo para los tristes, la fe para los descreídos y otros dones similares. Nada de eso podía adquirirse. Entonces me marché de la feria de retorno a mi palacio sin comprar nada. Comprendiendo que las riquezas materiales no compran tantas cosas como la gente cree. Mire el cielo azul y el sol y unos pájaros que volaban y por semejante dicha no tuve que pagar absolutamente nada. He tenido un sueño, y he comprendido que la riqueza es una cosa tremendamente inútil. Ninguna moneda en el mundo compra una sonrisa sincera. He tenido un sueño. Soñé que las mejores cosas de la vida no se compran, soñé que las flores marchitas no reviven por un puñado de monedas, ni las estrellas apagadas, ni los amores muertos. Las mejores cosas de la vida son gratis, recuérdalo.