{"uid":"cap_fswKKILM8cK3MCVE4HJKY","slug":"saylor-innovations-555-timer-calculator-14b91d35","name":"Saylor Innovations 555 Timer Calculator","description":"Frequency, duty cycle, pulse width or the E24 resistor values to hit a target","url":"https://saylorinnovations.com/api/electronics/timer-555?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","POST","PUT","PATCH","DELETE","HEAD"],"type":"string"},"queryParams":{"type":"object","properties":{"c_f":{"type":"string","description":"optional timing capacitor in farads, for example 1e-7 (query)"},"mode":{"type":"string","description":"optional astable (default) or monostable (query)"},"r1_ohm":{"type":"string","description":"optional (query)"},"r2_ohm":{"type":"string","description":"optional (astable) (query)"},"target_hz":{"type":"string","description":"optional target frequency for astable design (query)"},"target_pulse_s":{"type":"string","description":"optional pulse width for monostable design (query)"},"target_duty_percent":{"type":"string","description":"optional duty cycle for design, 51-95, default 60 (query)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"unprobed","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_a7nA7yEKA-yatf3Rv-PDF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates 555 timer circuit parameters — frequency, duty cycle, pulse width, and E24 resistor values — for astable or monostable configurations","exampleAgentPrompt":"Can you calculate the 555 timer resistor and component values for an astable oscillator running at 1kHz with a 60% duty cycle using a 100nF capacitor?","exampleUseCases":[{"title":"Astable oscillator frequency design","prompt":"I need to design a 555 astable oscillator at 2.5kHz with roughly 70% duty cycle — can you find the right E24 resistor values to use with a 10nF capacitor?"},{"title":"Monostable pulse timer design","prompt":"What resistor do I need for a 555 monostable circuit to produce a 250ms pulse, using a 1µF timing capacitor?"},{"title":"Verify existing 555 circuit parameters","prompt":"I have a 555 astable timer with R1 = 10kΩ, R2 = 47kΩ, and C = 100nF — what frequency and duty cycle will that produce?"}],"resultDescription":"Returns computed 555 timer circuit parameters including operating frequency (Hz), duty cycle (%), pulse width (seconds), and recommended E24 standard resistor values (R1, R2 in ohms) for the specified astable or monostable configuration.","failureModes":["Missing required mode parameter defaults to astable — may return unexpected results if monostable was intended","Out-of-range duty cycle (outside 51–95%) may return error or be clamped to defaults","Incompatible combinations of R1, R2, C, and target frequency may yield no valid E24 solution","Non-numeric or malformed parameter strings (e.g. invalid scientific notation) will cause parse errors","Very high or very low frequency targets may exceed practical 555 timer limits and return no solution"],"whenToPreferThis":"Use this endpoint when designing or verifying 555 timer circuits and needing standard E24 component values matched to a target frequency, duty cycle, or pulse width. It is ideal for electronics engineers, hobbyists, or AI agents building hardware design tools. Prefer this over generic calculators when you want E24 resistor-snapped results for both astable and monostable modes in a single API call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:41:15.354Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-555-timer-calculator-14b91d35"}