Ebay description was "NE555 Pulse Generator Duty Ratio Adjustable Adjustable Small Signal Generator". Pre-tax price was was A$1.70 or US$1.20. My reference: P1060552
Full Ebay description:
Description:
1. Size: 20mm * 40mm
2. Function: to produce a square wave or square wave at different frequencies;
3. Parameter index:
(1) Power supply: Input voltage: 5V. 5V supply, the output current can be around 10MA;
(2) Frequency: 5 bands (Found)
J1 file: 0.6Hz ~ 25Hz
J2 file: 7Hz ~ 300Hz
J3 file: 50Hz ~ 2.5kHz
J4 block: 350kHz ~ 6.6kHz
J5 block: 6.7kHz ~ 180kHz
Adjustable duty cycle range: 0.4-0.99
(3) LED output indicator, low level LED lights, LED off high, led flashing speed represents the frequency of the output changes; in addition to select different bands outside jumper cap, RV1 adjustment can adjust the frequency, the regulation can be seen flashing led adjust the corresponding frequency change;
(4) Input Current: ≥100MA
(5) Output voltage: 4.2V
(6) The output frequency is calculated: Period T = 0.7 (Ra + 2Rb) C Ra, Rb for 0-10K adjustable;
(7) Input: VCC GND Output: VCC OUT GND input voltage and output consistency here, the purpose of user-friendly, you can follow-up power supply. OUT is the output frequency signal.
Package included:
1PCS *NE555 Adjustable Pulse Generator
