Power & current limit
API · /zener-api
Zener Regulator API
Zener-diode voltage-regulator electronics maths as an API, computed locally and deterministically. The series-resistor endpoint sizes the series (dropping) resistor for a shunt Zener regulator, Rs = (Vin − Vz)/(Iz + Il), from the input voltage, the Zener voltage, the load current and the desired Zener (knee) current, and gives the power the resistor and the Zener must dissipate — the core design step so the diode stays in regulation at maximum load. The regulator endpoint analyses an existing regulator: from the input voltage, the Zener voltage, the series resistor and the load (as a current or a resistance) it computes the total current, the Zener current Iz = (Vin − Vz)/Rs − Il, the load current, the output voltage and whether the regulator is still regulating (Iz > 0) or has dropped out under heavy load. The power endpoint computes the Zener power dissipation P = Vz·Iz and the maximum safe current Iz_max = Pz_max/Vz from the diode's power rating. Voltages are in volts, currents in amperes, resistances in ohms and power in watts. Everything is computed locally and deterministically, so it is instant and private. Ideal for electronics, power-supply, hobbyist and embedded app developers, regulator-design and reference-voltage tools, and electronics education. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the Zener shunt regulator; for BJT biasing use a transistor API and for an LED series resistor an LED-resistor API.
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- 2,720 chiamate/mese
- 2 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 2,720 calls/month
- 2 req/sec
- Series resistor + regulator + power
- No credit card
Starter
€8.00 /mese
- 40,800 chiamate/mese
- 6 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 40,800 calls/month
- 6 req/sec
- Dropout check, dissipation, limits
- Email support
Pro
€20.00 /mese
- 254,000 chiamate/mese
- 15 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 254,000 calls/month
- 15 req/sec
- Power-supply & reference pipelines
- Priority support
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€63.00 /mese
- 1,645,000 chiamate/mese
- 40 richieste/secondo
- Tetto rigido (429 sopra la quota, nessuna eccedenza)
- 1,645,000 llamadas/mes
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RTD Pt100 Sensor API
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api.oanor.com/rtd-api
Voltage Divider API
Resistive voltage-divider circuit design as an API, computed locally and deterministically. The divide endpoint takes an input voltage and two resistors and returns the output voltage Vout = Vin·R2/(R1+R2), the current I = Vin/(R1+R2) that flows through the chain, and the power dissipated in each resistor and in total — a 12 V source with R1 = 1 kΩ and R2 = 2 kΩ gives 8 V at 4 mA. The loaded endpoint adds a load resistor across R2, computes the parallel combination R2′ = R2·RL/(R2+RL) and the loaded output Vout = Vin·R2′/(R1+R2′), and reports the droop in volts and percent against the unloaded value, the classic mistake when a divider feeds a real load. The resistor endpoint sizes the missing resistor for a target output — R2 = R1·Vout/(Vin−Vout) or R1 = R2·(Vin−Vout)/Vout — so you can pick parts for a reference or sensor-bias point. All quantities are volts, ohms, amps and watts. Everything is computed locally and deterministically, so it is instant and private. Ideal for electronics, embedded, hardware, sensor-interfacing and EE-education app developers, reference-voltage and bias-network tools, and maker software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is the resistive divider; for a single Ohm’s-law relationship use an Ohm’s-law API and for RC/RL filters an RC-filter API.
api.oanor.com/voltagedivider-api
RC Filter API
First-order RC and RL passive-filter design as an API, computed locally and deterministically. The lowpass and highpass endpoints take a resistor and capacitor (RC) or a resistor and inductor (RL) and return the −3 dB cutoff frequency (fc = 1/(2πRC) for RC, R/(2πL) for RL), the time constant (τ = RC or L/R) and the angular cutoff; pass a frequency as well and they add the magnitude response as a linear gain and in decibels and the phase shift in degrees — a 1 kΩ / 1 µF low-pass has fc ≈ 159.15 Hz, and right at the cutoff the gain is −3.01 dB with −45° phase for a low-pass or +45° for a high-pass. The component endpoint solves the missing one of fc, R and C from the other two (fc = 1/(2πRC)), so you can size a resistor or capacitor for a target cutoff. All quantities are SI: ohms, farads, henries and hertz. Everything is computed locally and deterministically, so it is instant and private. Ideal for electronics, audio, embedded, signal-processing and EE-education app developers, filter-design and circuit-sizing tools, and maker software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is first-order single-pole filter design; for full RLC impedance and resonance use an impedance API and for stored capacitor energy a capacitor API.
api.oanor.com/rcfilter-api
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curl https://api.oanor.com/zener-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/zener-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/zener-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
"https://api.oanor.com/zener-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())
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