🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 162 (from laksa024)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa162.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://ohmslawcalculator.com/led-resistor-calculator\')), getAhrefsUnparsedNoserviceFromURL(\'https://ohmslawcalculator.com/led-resistor-calculator\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/ohmslawcalculator.com\/led-resistor-calculator","crawl_time":1776096624,"first_indexed_time":1595872396,"http_code":200,"src_unparsed":"com,ohmslawcalculator!\/led-resistor-calculator s443","src_root_hash":"13715046656620959362","history_drop_reason":null,"meta_title":"LED Resistor Calculator","meta_descriptions":["Calculate resistor values for LEDs using this simple calculator. Enter any three known values and press Calculate to solve for the others."],"attrs_boilerpipe_text":"Home\nLED Resistor Calculator\nTo calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm's Law. In other words...\nwhere:\nV\nS\nis the source voltage, measured in volts (V),\nV\nLED\nis the voltage drop across the LED, measured in volts (V),\nI\nLED\nis the current through the LED\n*\n, measured in Amperes (Amps\/A), and\nR is the resistance, measured in Ohms (Ω).\n* The current through the circuit is constant so I\nLED\nis also the current through the resistor.\nThis calculator is based on the\nOhms Law Calculator\n, but takes into consideration the voltage drop from the LED. To use the calculator, enter any three known values and press \"Calculate\" to solve for the others.\nVoltage Source (V\nS\n)\nVolts (V)\nVoltage drop from LED (V\nLED\n)\nVolts (V)\nCurrent through the LED (I\nLED\n)\nResistance (R)\nLED Power (P)\nWatts (W)\nClick \"Calculate\" to update the fields with orange borders.","attrs_markdown":"[Ohm's Law Calculator![Ohm's Law Calculator](https:\/\/ohmslawcalculator.com\/static\/img\/logo.png)](https:\/\/ohmslawcalculator.com\/)\n\n- [Resistance Calculators](https:\/\/ohmslawcalculator.com\/led-resistor-calculator)\n  - [Ohm's Law Calculator](https:\/\/ohmslawcalculator.com\/ohms-law-calculator)\n  - [Voltage Divider Calculator](https:\/\/ohmslawcalculator.com\/voltage-divider-calculator)\n- [LED Calculators](https:\/\/ohmslawcalculator.com\/led-resistor-calculator)\n  - [mcd to Lumens Converter](https:\/\/ohmslawcalculator.com\/mcd-to-lumens)\n  - [LED Resistor Calculator](https:\/\/ohmslawcalculator.com\/led-resistor-calculator)\n- [Other Calculators](https:\/\/ohmslawcalculator.com\/led-resistor-calculator)\n  - [555 Astable Calculator](https:\/\/ohmslawcalculator.com\/555-astable-calculator)\n  - [555 Monostable Calculator](https:\/\/ohmslawcalculator.com\/555-monostable-calculator)\n- [Reference](https:\/\/ohmslawcalculator.com\/led-resistor-calculator)\n  - [Ohm's Law Wheel](https:\/\/ohmslawcalculator.com\/ohms-law-wheel)\n  - [E24 Resistor Sizes](https:\/\/ohmslawcalculator.com\/e24-resistor-sizes)\n  - [AWG Wire Sizes](https:\/\/ohmslawcalculator.com\/awg-wire-chart)\n  - [Resistor Colour Chart](https:\/\/ohmslawcalculator.com\/resistor-colour-chart)\n\n# LED Resistor Calculator\n1. [Home](https:\/\/ohmslawcalculator.com\/)\n2. LED Resistor Calculator\n\nTo calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm's Law. In other words...\n\n![LED Resistor Formula: R = (Vs - Vled)\/Iled](https:\/\/ohmslawcalculator.com\/static\/img\/led-resistor-calculator-1.png)\n\nwhere:\n\n- VS is the source voltage, measured in volts (V),\n- VLED is the voltage drop across the LED, measured in volts (V),\n- ILED is the current through the LED\\*, measured in Amperes (Amps\/A), and\n- R is the resistance, measured in Ohms (Ω).\n\n*\\* The current through the circuit is constant so ILED is also the current through the resistor.*\n\n![](https:\/\/ohmslawcalculator.com\/static\/img\/led-resistor-calculator-2.png)\n\nThis calculator is based on the [Ohms Law Calculator](https:\/\/ohmslawcalculator.com\/ohms-law-calculator), but takes into consideration the voltage drop from the LED. To use the calculator, enter any three known values and press \"Calculate\" to solve for the others.\n\n[Web Application Developed by Zero Point Labs](http:\/\/zeropointlabs.com\/our-work\/web-applications)","attrs_readable_markdown":"1. [Home](https:\/\/ohmslawcalculator.com\/)\n2. LED Resistor Calculator\n\nTo calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm's Law. In other words...\n\n![LED Resistor Formula: R = (Vs - Vled)\/Iled](https:\/\/ohmslawcalculator.com\/static\/img\/led-resistor-calculator-1.png)\n\nwhere:\n\n- VS is the source voltage, measured in volts (V),\n- VLED is the voltage drop across the LED, measured in volts (V),\n- ILED is the current through the LED\\*, measured in Amperes (Amps\/A), and\n- R is the resistance, measured in Ohms (Ω).\n\n*\\* The current through the circuit is constant so ILED is also the current through the resistor.*\n\n![](https:\/\/ohmslawcalculator.com\/static\/img\/led-resistor-calculator-2.png)\n\nThis calculator is based on the [Ohms Law Calculator](https:\/\/ohmslawcalculator.com\/ohms-law-calculator), but takes into consideration the voltage drop from the LED. To use the calculator, enter any three known values and press \"Calculate\" to solve for the others.","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

5 hours ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://ohmslawcalculator.com/led-resistor-calculator
Last Crawled	2026-04-13 16:10:24 (5 hours ago)
First Indexed	2020-07-27 17:53:16 (5 years ago)
HTTP Status Code	200
Meta Title	LED Resistor Calculator
Meta Description	Calculate resistor values for LEDs using this simple calculator. Enter any three known values and press Calculate to solve for the others.
Meta Canonical	null
Boilerpipe Text	Home LED Resistor Calculator To calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm's Law. In other words... where: V S is the source voltage, measured in volts (V), V LED is the voltage drop across the LED, measured in volts (V), I LED is the current through the LED * , measured in Amperes (Amps/A), and R is the resistance, measured in Ohms (Ω). * The current through the circuit is constant so I LED is also the current through the resistor. This calculator is based on the Ohms Law Calculator , but takes into consideration the voltage drop from the LED. To use the calculator, enter any three known values and press "Calculate" to solve for the others. Voltage Source (V S ) Volts (V) Voltage drop from LED (V LED ) Volts (V) Current through the LED (I LED ) Resistance (R) LED Power (P) Watts (W) Click "Calculate" to update the fields with orange borders.
Markdown	[Ohm's Law Calculator![Ohm's Law Calculator](https://ohmslawcalculator.com/static/img/logo.png)](https://ohmslawcalculator.com/) - [Resistance Calculators](https://ohmslawcalculator.com/led-resistor-calculator) - [Ohm's Law Calculator](https://ohmslawcalculator.com/ohms-law-calculator) - [Voltage Divider Calculator](https://ohmslawcalculator.com/voltage-divider-calculator) - [LED Calculators](https://ohmslawcalculator.com/led-resistor-calculator) - [mcd to Lumens Converter](https://ohmslawcalculator.com/mcd-to-lumens) - [LED Resistor Calculator](https://ohmslawcalculator.com/led-resistor-calculator) - [Other Calculators](https://ohmslawcalculator.com/led-resistor-calculator) - [555 Astable Calculator](https://ohmslawcalculator.com/555-astable-calculator) - [555 Monostable Calculator](https://ohmslawcalculator.com/555-monostable-calculator) - [Reference](https://ohmslawcalculator.com/led-resistor-calculator) - [Ohm's Law Wheel](https://ohmslawcalculator.com/ohms-law-wheel) - [E24 Resistor Sizes](https://ohmslawcalculator.com/e24-resistor-sizes) - [AWG Wire Sizes](https://ohmslawcalculator.com/awg-wire-chart) - [Resistor Colour Chart](https://ohmslawcalculator.com/resistor-colour-chart) # LED Resistor Calculator 1. [Home](https://ohmslawcalculator.com/) 2. LED Resistor Calculator To calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm's Law. In other words... ![LED Resistor Formula: R = (Vs - Vled)/Iled](https://ohmslawcalculator.com/static/img/led-resistor-calculator-1.png) where: - VS is the source voltage, measured in volts (V), - VLED is the voltage drop across the LED, measured in volts (V), - ILED is the current through the LED\, measured in Amperes (Amps/A), and - R is the resistance, measured in Ohms (Ω). \* The current through the circuit is constant so ILED is also the current through the resistor.* ![](https://ohmslawcalculator.com/static/img/led-resistor-calculator-2.png) This calculator is based on the [Ohms Law Calculator](https://ohmslawcalculator.com/ohms-law-calculator), but takes into consideration the voltage drop from the LED. To use the calculator, enter any three known values and press "Calculate" to solve for the others. [Web Application Developed by Zero Point Labs](http://zeropointlabs.com/our-work/web-applications)
Readable Markdown	1. [Home](https://ohmslawcalculator.com/) 2. LED Resistor Calculator To calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm's Law. In other words... ![LED Resistor Formula: R = (Vs - Vled)/Iled](https://ohmslawcalculator.com/static/img/led-resistor-calculator-1.png) where: - VS is the source voltage, measured in volts (V), - VLED is the voltage drop across the LED, measured in volts (V), - ILED is the current through the LED\, measured in Amperes (Amps/A), and - R is the resistance, measured in Ohms (Ω). \* The current through the circuit is constant so ILED is also the current through the resistor.* ![](https://ohmslawcalculator.com/static/img/led-resistor-calculator-2.png) This calculator is based on the [Ohms Law Calculator](https://ohmslawcalculator.com/ohms-law-calculator), but takes into consideration the voltage drop from the LED. To use the calculator, enter any three known values and press "Calculate" to solve for the others.
Shard	162 (laksa)
Root Hash	13715046656620959362
Unparsed URL	com,ohmslawcalculator!/led-resistor-calculator s443