# Tachometer sweep loader
> A rev counter needle climbs to the red zone and drops back to zero, like the self test when a car starts.
- Category: [Loaders](https://library.aimran.es/components/loaders)
- Built with: HTML + CSS
- Live editor: https://library.aimran.es/blocks/uv-ld-gauge-sweep
- Library: AIMRAN Library (https://library.aimran.es), free, no sign-up, by Aimran Oukham
## Where to use it
A full instrument dial in CSS: chrome bezel, carbon texture, forty one ticks, numbers kept upright with counter rotations, a red zone painted with a masked conic gradient and a glowing needle with overshoot. It suits car configurators, sports apps, performance reports and any start up screen that needs energy.
The main color lights the needle and the second color the markings. Use it during a short boot or a data warm up, and avoid it for long waits, where a calmer loader reads better.
## Code
### HTML
```html
Starting up012345678x1000
```
### CSS
```css
.uvq10-gau {
--c1: #ff5a1f;
--c2: #e6f2ff;
--s: 16px;
/* tamaño */
--k: 1;
/* velocidad */
--fg: #1d1d1f;
/* texto */
--bg: #f5f5f7;
/* fondo */
}
.uvq10-gau {
font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
font-size: var(--s);
color: var(--fg);
-webkit-tap-highlight-color: transparent;
position: relative;
box-sizing: border-box;
width: 8em;
height: 8em;
padding: .32em;
border-radius: 50%;
background: linear-gradient(145deg,#e5e7eb,#4b5563 45%,#9ca3af 70%,#374151);
box-shadow: 0 1em 1.8em -1em rgba(0,0,0,.6);
}
.uvq10-gau .sr {
position: absolute;
width: 1px;
height: 1px;
overflow: hidden;
clip: rect(0 0 0 0);
white-space: nowrap;
}
.uvq10-gau .dial {
position: relative;
width: 100%;
height: 100%;
border-radius: 50%;
overflow: hidden;
background: repeating-linear-gradient(45deg,rgba(255,255,255,.025) 0 2px,transparent 2px 4px),radial-gradient(circle at 50% 40%,#1f2226,#0a0b0d 72%);
box-shadow: inset 0 .3em .8em rgba(0,0,0,.85);
}
.uvq10-gau .red {
position: absolute;
inset: .22em;
border-radius: 50%;
background: conic-gradient(transparent 0 75deg,#e11d48 75deg 120deg,transparent 120deg);
-webkit-mask: radial-gradient(circle,transparent 3.02em,#000 3.06em);
mask: radial-gradient(circle,transparent 3.02em,#000 3.06em);
opacity: .85;
}
.uvq10-gau b {
position: absolute;
left: 50%;
top: 50%;
width: .07em;
height: .3em;
margin: -.15em 0 0 -.035em;
background: color-mix(in srgb,var(--c2) 70%,transparent);
transform: rotate(var(--a)) translateY(-3.1em);
}
.uvq10-gau b.mj {
width: .13em;
height: .55em;
margin: -.275em 0 0 -.065em;
background: var(--c2);
transform: rotate(var(--a)) translateY(-2.98em);
}
.uvq10-gau .nu {
position: absolute;
left: 50%;
top: 50%;
display: grid;
place-items: center;
width: 1.2em;
height: 1.2em;
margin: -.6em;
transform: rotate(var(--a)) translateY(-2.25em) rotate(calc(var(--a) * -1));
}
.uvq10-gau .nu em {
font-style: normal;
font-weight: 700;
font-size: .78em;
color: var(--c2);
}
.uvq10-gau .lbl {
position: absolute;
left: 50%;
top: 66%;
transform: translateX(-50%);
font: 600 .5em/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;
letter-spacing: .12em;
color: color-mix(in srgb,var(--c2) 60%,transparent);
}
.uvq10-gau .nd {
position: absolute;
left: calc(50% - .08em);
bottom: calc(50% - .45em);
width: .16em;
height: 3.35em;
border-radius: .1em .1em .05em .05em;
transform-origin: 50% calc(100% - .45em);
background: linear-gradient(var(--c1),color-mix(in srgb,var(--c1) 70%,#000));
box-shadow: 0 0 .45em var(--c1);
transform: rotate(-120deg);
animation: uvq10-gau calc(3s / var(--k)) cubic-bezier(.45,0,.25,1) infinite;
}
.uvq10-gau .hub {
position: absolute;
left: 50%;
top: 50%;
width: .9em;
height: .9em;
margin: -.45em;
border-radius: 50%;
background: radial-gradient(circle at 40% 35%,#4b5563,#0b0c0e);
box-shadow: 0 0 0 .08em #6b7280;
}
@keyframes uvq10-gau {
0% {
transform: rotate(-120deg);
}
38% {
transform: rotate(117deg);
}
44% {
transform: rotate(110deg);
}
50% {
transform: rotate(115deg);
}
82%,100% {
transform: rotate(-120deg);
}
}
@media (prefers-reduced-motion:reduce) {
.uvq10-gau,.uvq10-gau *,.uvq10-gau *::before,.uvq10-gau *::after {
animation-duration: .01ms!important;
animation-iteration-count: 1!important;
transition-duration: .01ms!important;
}
}
```
### React
```tsx
import type { CSSProperties } from "react";
const css = `
.uvq10-gau {
font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
font-size: var(--s);
color: var(--fg);
-webkit-tap-highlight-color: transparent;
position: relative;
box-sizing: border-box;
width: 8em;
height: 8em;
padding: .32em;
border-radius: 50%;
background: linear-gradient(145deg,#e5e7eb,#4b5563 45%,#9ca3af 70%,#374151);
box-shadow: 0 1em 1.8em -1em rgba(0,0,0,.6);
}
.uvq10-gau .sr {
position: absolute;
width: 1px;
height: 1px;
overflow: hidden;
clip: rect(0 0 0 0);
white-space: nowrap;
}
.uvq10-gau .dial {
position: relative;
width: 100%;
height: 100%;
border-radius: 50%;
overflow: hidden;
background: repeating-linear-gradient(45deg,rgba(255,255,255,.025) 0 2px,transparent 2px 4px),radial-gradient(circle at 50% 40%,#1f2226,#0a0b0d 72%);
box-shadow: inset 0 .3em .8em rgba(0,0,0,.85);
}
.uvq10-gau .red {
position: absolute;
inset: .22em;
border-radius: 50%;
background: conic-gradient(transparent 0 75deg,#e11d48 75deg 120deg,transparent 120deg);
-webkit-mask: radial-gradient(circle,transparent 3.02em,#000 3.06em);
mask: radial-gradient(circle,transparent 3.02em,#000 3.06em);
opacity: .85;
}
.uvq10-gau b {
position: absolute;
left: 50%;
top: 50%;
width: .07em;
height: .3em;
margin: -.15em 0 0 -.035em;
background: color-mix(in srgb,var(--c2) 70%,transparent);
transform: rotate(var(--a)) translateY(-3.1em);
}
.uvq10-gau b.mj {
width: .13em;
height: .55em;
margin: -.275em 0 0 -.065em;
background: var(--c2);
transform: rotate(var(--a)) translateY(-2.98em);
}
.uvq10-gau .nu {
position: absolute;
left: 50%;
top: 50%;
display: grid;
place-items: center;
width: 1.2em;
height: 1.2em;
margin: -.6em;
transform: rotate(var(--a)) translateY(-2.25em) rotate(calc(var(--a) * -1));
}
.uvq10-gau .nu em {
font-style: normal;
font-weight: 700;
font-size: .78em;
color: var(--c2);
}
.uvq10-gau .lbl {
position: absolute;
left: 50%;
top: 66%;
transform: translateX(-50%);
font: 600 .5em/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;
letter-spacing: .12em;
color: color-mix(in srgb,var(--c2) 60%,transparent);
}
.uvq10-gau .nd {
position: absolute;
left: calc(50% - .08em);
bottom: calc(50% - .45em);
width: .16em;
height: 3.35em;
border-radius: .1em .1em .05em .05em;
transform-origin: 50% calc(100% - .45em);
background: linear-gradient(var(--c1),color-mix(in srgb,var(--c1) 70%,#000));
box-shadow: 0 0 .45em var(--c1);
transform: rotate(-120deg);
animation: uvq10-gau calc(3s / var(--k)) cubic-bezier(.45,0,.25,1) infinite;
}
.uvq10-gau .hub {
position: absolute;
left: 50%;
top: 50%;
width: .9em;
height: .9em;
margin: -.45em;
border-radius: 50%;
background: radial-gradient(circle at 40% 35%,#4b5563,#0b0c0e);
box-shadow: 0 0 0 .08em #6b7280;
}
@keyframes uvq10-gau {
0% {
transform: rotate(-120deg);
}
38% {
transform: rotate(117deg);
}
44% {
transform: rotate(110deg);
}
50% {
transform: rotate(115deg);
}
82%,100% {
transform: rotate(-120deg);
}
}
@media (prefers-reduced-motion:reduce) {
.uvq10-gau,.uvq10-gau *,.uvq10-gau *::before,.uvq10-gau *::after {
animation-duration: .01ms!important;
animation-iteration-count: 1!important;
transition-duration: .01ms!important;
}
}
`;
export default function LdGaugeSweep() {
return (
<>
Starting up012345678x1000
);
}
```
## Prompt for AI assistants
Paste this into ChatGPT, Claude, Cursor, v0 or Lovable to adapt the block to your stack (Tailwind, Vue, Svelte…):
````text
I want to add the “Tachometer sweep loader” block (Loaders) from AIMRAN Library to my project.
## What it is
A rev counter needle climbs to the red zone and drops back to zero, like the self test when a car starts.
## Chosen settings
- Main color: #ff5a1f
- Secondary color: #e6f2ff
- Size: 16px (from 12 to 24px)
- Speed: 1x (from 0.5 to 2x)
## What I need
1. Add it to my project with the same look and animation as the reference code: same sizes, colours, radii, shadows, timings and easing.
2. It is built with plain HTML and CSS (the reference wraps it in a React component with its CSS). If my project uses something else (Vue, Svelte, Astro, plain HTML…), translate it without losing any behaviour. If I use Tailwind, turn the styles into classes; if not, keep the CSS in its own file.
3. Expose the settings above as props (or CSS variables) with those values as defaults.
4. Make it work well on phones: nothing that depends only on hover, touch targets of at least 44 px and no overflow on 320 px screens.
5. Make it look right in light and dark mode.
6. Keep it accessible: semantic HTML, roles and aria-* where needed, visible focus and keyboard support.
7. Respect prefers-reduced-motion: with reduced motion, no big animations but the same end result.
## Reference code
```tsx
import type { CSSProperties } from "react";
const css = `
.uvq10-gau {
font-family: -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter",system-ui,sans-serif;
font-size: var(--s);
color: var(--fg);
-webkit-tap-highlight-color: transparent;
position: relative;
box-sizing: border-box;
width: 8em;
height: 8em;
padding: .32em;
border-radius: 50%;
background: linear-gradient(145deg,#e5e7eb,#4b5563 45%,#9ca3af 70%,#374151);
box-shadow: 0 1em 1.8em -1em rgba(0,0,0,.6);
}
.uvq10-gau .sr {
position: absolute;
width: 1px;
height: 1px;
overflow: hidden;
clip: rect(0 0 0 0);
white-space: nowrap;
}
.uvq10-gau .dial {
position: relative;
width: 100%;
height: 100%;
border-radius: 50%;
overflow: hidden;
background: repeating-linear-gradient(45deg,rgba(255,255,255,.025) 0 2px,transparent 2px 4px),radial-gradient(circle at 50% 40%,#1f2226,#0a0b0d 72%);
box-shadow: inset 0 .3em .8em rgba(0,0,0,.85);
}
.uvq10-gau .red {
position: absolute;
inset: .22em;
border-radius: 50%;
background: conic-gradient(transparent 0 75deg,#e11d48 75deg 120deg,transparent 120deg);
-webkit-mask: radial-gradient(circle,transparent 3.02em,#000 3.06em);
mask: radial-gradient(circle,transparent 3.02em,#000 3.06em);
opacity: .85;
}
.uvq10-gau b {
position: absolute;
left: 50%;
top: 50%;
width: .07em;
height: .3em;
margin: -.15em 0 0 -.035em;
background: color-mix(in srgb,var(--c2) 70%,transparent);
transform: rotate(var(--a)) translateY(-3.1em);
}
.uvq10-gau b.mj {
width: .13em;
height: .55em;
margin: -.275em 0 0 -.065em;
background: var(--c2);
transform: rotate(var(--a)) translateY(-2.98em);
}
.uvq10-gau .nu {
position: absolute;
left: 50%;
top: 50%;
display: grid;
place-items: center;
width: 1.2em;
height: 1.2em;
margin: -.6em;
transform: rotate(var(--a)) translateY(-2.25em) rotate(calc(var(--a) * -1));
}
.uvq10-gau .nu em {
font-style: normal;
font-weight: 700;
font-size: .78em;
color: var(--c2);
}
.uvq10-gau .lbl {
position: absolute;
left: 50%;
top: 66%;
transform: translateX(-50%);
font: 600 .5em/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;
letter-spacing: .12em;
color: color-mix(in srgb,var(--c2) 60%,transparent);
}
.uvq10-gau .nd {
position: absolute;
left: calc(50% - .08em);
bottom: calc(50% - .45em);
width: .16em;
height: 3.35em;
border-radius: .1em .1em .05em .05em;
transform-origin: 50% calc(100% - .45em);
background: linear-gradient(var(--c1),color-mix(in srgb,var(--c1) 70%,#000));
box-shadow: 0 0 .45em var(--c1);
transform: rotate(-120deg);
animation: uvq10-gau calc(3s / var(--k)) cubic-bezier(.45,0,.25,1) infinite;
}
.uvq10-gau .hub {
position: absolute;
left: 50%;
top: 50%;
width: .9em;
height: .9em;
margin: -.45em;
border-radius: 50%;
background: radial-gradient(circle at 40% 35%,#4b5563,#0b0c0e);
box-shadow: 0 0 0 .08em #6b7280;
}
@keyframes uvq10-gau {
0% {
transform: rotate(-120deg);
}
38% {
transform: rotate(117deg);
}
44% {
transform: rotate(110deg);
}
50% {
transform: rotate(115deg);
}
82%,100% {
transform: rotate(-120deg);
}
}
@media (prefers-reduced-motion:reduce) {
.uvq10-gau,.uvq10-gau *,.uvq10-gau *::before,.uvq10-gau *::after {
animation-duration: .01ms!important;
animation-iteration-count: 1!important;
transition-duration: .01ms!important;
}
}
`;
export default function LdGaugeSweep() {
return (
<>
Starting up012345678x1000
);
}
```
Give me the complete final code, ready to paste, and tell me in one line where to put it in my project.
````