# Services from electronics-calc.x402tookit.com on Zero

> electronics-calc.x402tookit.com serves 11 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/electronics-calc.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/electronics-calc.x402tookit.com/health.json

## Services

- [LED Series Resistor Calculator](https://www.zero.xyz/c/led-series-resistor-calculator-79a3ed7e/llms.txt): $0.02/call via x402. Calculates the required series resistor for an LED given supply voltage, LED forward voltage, and desired current, returning exact resistance, nearest E12/E24 standard values, and actual current with that resistor.
- [Electronics Calculators – Standard Resistor Value Finder](https://www.zero.xyz/c/electronics-calculators-standard-resistor-value-finder-f0ddd5a0/llms.txt): $0.02/call via x402. Returns the nearest standard resistor values above and below a target resistance for a chosen E-series (E6–E192), along with percent error for each neighbour.
- [Electronics Calculators – Decibel Converter](https://www.zero.xyz/c/electronics-calculators-decibel-converter-14496a8d/llms.txt): $0.02/call via x402. Converts between decibels and linear ratios (power or voltage/amplitude) and between dBm and milliwatts/watts.
- [Electronics Calculators – Ohm's Law & Power](https://www.zero.xyz/c/electronics-calculators-ohm-s-law-power-9c6a586f/llms.txt): $0.02/call via x402. Given any two of voltage, current, resistance, and power, calculates all four values with engineering-unit formatting.
- [Electronics Power Cost Calculator](https://www.zero.xyz/c/electronics-power-cost-calculator-0f4bef99/llms.txt): $0.02/call via x402. Calculates energy consumption (kWh) and running cost of an electrical device per hour, day, month, and year from its wattage, daily usage hours, and electricity price.
- [Battery Runtime Calculator](https://www.zero.xyz/c/battery-runtime-calculator-1f4976c6/llms.txt): $0.02/call via x402. Estimates how long a battery will last given its capacity (mAh/V or Wh), load (mA or W), converter efficiency, and usable depth of discharge.
- [RC Filter Calculator](https://www.zero.xyz/c/rc-filter-calculator-05a3a551/llms.txt): $0.02/call via x402. Computes RC filter cutoff frequency, time constant, and capacitor charge times (63%, 90%, 95%, 99%, 99.9%) from resistance and capacitance values.
- [Electronics Calculators – Resistor Color Code Decoder/Encoder](https://www.zero.xyz/c/electronics-calculators-resistor-color-code-decoder-encoder-e84e4de6/llms.txt): $0.02/call via x402. Decodes 3–6 resistor color bands to ohms, tolerance, and temperature coefficient, or encodes a resistance value into 4 or 5 color bands.
- [NE555 Timer Calculator](https://www.zero.xyz/c/ne555-timer-calculator-95651021/llms.txt): $0.02/call via x402. Calculates astable oscillator frequency, period, duty cycle, high/low times, or monostable pulse width for an NE555 timer circuit given resistor and capacitor values.
- [AWG Wire Gauge Calculator](https://www.zero.xyz/c/awg-wire-gauge-calculator-b98880f7/llms.txt): $0.02/call via x402. Returns AWG copper wire diameter, cross-sectional area, resistance per km, and optionally calculates voltage drop and power loss over a given run.
- [Resistor Voltage Divider Calculator](https://www.zero.xyz/c/resistor-voltage-divider-calculator-4bf5d7b8/llms.txt): $0.02/call via x402. Calculates output voltage, current, and power dissipation for a resistor voltage divider given R1 and R2, or finds the R2 needed to achieve a target output voltage.

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