Geekcreit diy frequency tester

File: http://img.staticbg.com/file/products/20160817023551SKU360318.pdf Features: Measurable frequency range: 1Hz to 50MHz Measurable signal frequency: up to 30V Can measure most commonly used crystal of oscillation frequency Five-digit accuracy resolution Automatic range switching Programmable frequency setting for measuring radio transceiver equipment Selectable power-saving mode, if there is no significant change in 15 seconds automatically turn off the display frequency Wide power supply range, you can use a common USB interface power supply, can also use an external power supply or 9V battery 5-12V Note: This is a DIY kit, you need to have some knowledge of electronics and ability. Package included: 1 x DIY kit 1 x Transparent housing

Buy Geekcreit 1Hz-50MHz Crystal Oscillator Frequency Tester Counter Meter With Case for R499.00

Buy Geekcreit DIY 3V FM Radio Kit Electronic Learning Suite Frequency Ran... (COLOR.: BLACK | TYPE: 2) for R315.00

Buy Geekcreit DIY 3V FM Radio Kit Electronic Learning Suite Frequency Ran... (COLOR.: WHITE | TYPE: 1) for R304.00

Feature: Size: 120 x 76 x 26mm LCD Monitor: 52 x 34mm Frequency range: 72MHz-108.6MHz IF frequency: 10.7MHz Power: 3V (2 * AA battery) Output Power: ≥180mW Color: Black, White Difference between Type 1 and Type 2: Type 1: Basic version, this display module is soldered. Type 2: Improve version, the SMD is unsoldered, the display module is unsoldered. (Is more difficult) Please select the version you need. Package includes: 1 x DIY FM Radio Kit

SELECTED OPTION: TYPE: UNASSEMBLEKIT CLICK HERE for more options in this item. DIY Unassembled Kit User Manual: Assembled Kit User Manual: Specifications: Asssembled Item Size: 98x76x39mm Description: -The use of SCM ATMEAG328P DIP-28. With IC Block -The display unit using a 160x128 pixel color display, full-screen characters 8x20, 16-bit color depth, graphic display element symbols Rotary switch control, a key measurement, automatic shutdown -Use 9V laminated battery, can also use the power adapter(DC 6.8-12V), the whole current of about 30mA, after about 20nA shutdown current -Automatically detects NPN and PNP transistors, FET, diodes, dual diode, thyristor, SCR, automatic identification of the transistor pinout -Test NPN and PNP transistor common-emitter current amplification factor, the base - emitter threshold voltage, off the collector - emitter leakage current Pole through the transistor base - emitter threshold voltage and high current gain recognition Darlington transistor Detecting power transistor and FET protection diodes built -Test FET gate - source threshold voltage is turned on, the drain - source on-resistance, the gate - source capacitance A maximum of two measuring resistors, so three feet adjustable resistor can be measured, if adjustable resistor is transferred to the end, can only be a measured resistance value -Resistance measurement maximum resolution 0.01Ohm. Can be measured up to 50MOhm -Capacitor measuring range from 25pF-100mF, Resolution 1pF -Larger than 90nF capacitor while measuring its equivalent series resistance (ESR), the equivalent series resistance of the highest resolution of 0.01Ohm -Larger than 5000pF capacitor also showed the rate of decline after the charging voltage of the capacitor value can reflect the quality factor (Q value) -Measuring a maximum of two diodes show its positive and negative, on-state voltage -LEDs also display a graphic symbol diode, the conduction voltage is much higher than ordinary diode -Reverse breakdown voltage is lower than 4.5V Zener diode can detect it, appears as double diode symbol. Its positive and negative voltage to turn around 700mV diode symbol prevail, a second diode symbol corresponding to the voltage is turned on regulation. So do not be an ordinary diode and a Zener diode were measured simultaneously -Test a single diode, while its test reverse junction between the PN junction capacitance between the PN junction capacitance of the transistor to be tested, then only at the same time into the transistor base and the emitter, base and collector or Of less than 25pF capacitor to be tested, the test need to prepare a 30pF capacitor, 30pF capacitor to test, test and then measured again after the capacitor connected in parallel, by subtracting the measured value 30pF capacitors with the results obtained -For the following 2100Ohm resistor while measuring its inductance measuring range from 0.01mH - 20H -About two seconds during the test, large capacitors and inductors will take longer -Additional features include a frequency measurement, voltage measurement, square wave generator, PWM generator, color selection, commissioning calibration, continuous testing, and other functions -Frequency range from 1Hz to 1MHz or higher, measured at frequencies below 25kHz, can display period resolution to 0.001mHz -DC voltage measurement up to 50V -All the way to the square wave signal output, multi-range frequencies to choose from, the maximum output frequency of 2MHz -Output one fixed frequency, variable duty cycle pulse signal (PWM), the duty cycle is adjustable from 1% -99% -Separate capacitive function test, the test mode for the continuous measurement of 2uF-50mF capacitors can be measured directly in their circuit (circuit where the measured capacitance required power, after the measured capacitance required to be fully discharged) -Thyristors and thyristor can only recognize its pinout, and also need to test the thyristor or SCR trigger current is less than the current test instrument can provide, the tester can only provide a maximum trigger current 6mA Features: 1. Switch off 2. Transistor test 3. Frequency test 4. f-Generator 5. 10-bit PWM 6. C+ESR@TP1:3 7. continuous measurement resistance 8. 1-||-3 continuous measurement capacitance 9. Rotary encoder 10. SelfTest 11. Voltage test 12. FrontColor 13. BackColor adjust 14. Show date Package included: 1 x GM328 Transistor Tester with Case Kit (Assembled Kit or DIY Unassembled Kit For your choice.)

Specifications: Voltage supply: 9-12V DC Input Waveforms: Square, Sine & Triangle Impedance: 600 Ohm + 10% Frequency: 1Hz - 1MHz SINE wave: Amplitude: 0 - 3V at 9V DC input Distortion: Less than 1% (at 1kHz) Flatness: +0.05dB 1Hz - 100kHz SQUARE wave: Amplitude: 8V (no load) at 9V DC input Rise Time: Less than 50ns (at 1kHz) Fall Time: Less than 30ns (at 1kHz) Symmetry: Less than 5% (at 1kHz) TRIANGLE wave: Amplitude: 0 - 3V at 9V DC input Linearity: Less than 1% (up to 100kHz) 10mA Package included: 1 x XR2206 Function Signal Generator DIY Kit

Features: The processor uses high performance MCU ATmega328, and uses external 8MHz crystal oscillator as the system clock. Using 1.8 Inch LCD display, resolution of 128X160, support 65536 colors. Single button operation, support automatic shutdown for reducing power consumption. Support battery power supply, shutdown current less than 20nA. Each measurement time is about 2S, and only when measuring capacitance or inductance, the measurement time becomes longer. Automatic detection of NPN, PNP bipolar transistor, N channel, P channel MOSFET and JFET, diode, double diode, P-IGPT, thyristor, double thyristor and so on. For some thyristors and double thyristors, the transistor tester can not be tested when the current and current can not be satisfied. For some IGPT with a driving voltage of more than 5V, the transistor tester can not test it. Support the identification of the pins of test elements. Supports the measurement of current amplification factor and base emitter turn-on voltage of bipolar transistors. The Darlington transistor can be distinguished by the turn-on voltage and the current amplification factor. The gate threshold voltage, gate capacitance and drain to drain source resistance of the RDSon under the 5V gate voltage are tested to test the MOSFET. Supports simultaneous measurement of two resistors, and data is displayed in four bit decimal format. Support potentiometer test, but when the potentiometer is adjusted to one end, at this time can not distinguish between the intermediate pin and the end pin. The minimum resistance resolution is 0.01 ohms, and the maximum resistance is 50M ohm. A capacitor can be measured with a capacitance range of 25pf~100mF and a resolution of 1pF. The capacitance less than 25pF can be measured by parallel with another known capacitance greater than or equal to 25pF, and the measured capacitance value can be obtained by subtracting the known capacitance value. When the capacitance greater than 90nF is tested, the series equivalent resistance is also displayed, with a resolution of 0.01 ohms. When the capacitance greater than 5000pF is tested, the voltage loss after the test pulse can be measured, and the quality factor of the capacitor can be estimated by this parameter. Supports simultaneous measurement of two diodes with additional display diode voltage drop. LEDs are identified as diodes, and the test voltage drop is much larger than that of conventional diodes. The two-color diode is identified as two diodes. The equivalent inductance of the resistor less than 2100 ohms is also measured at the same time, with a range of 0.01mH~20H, but the measurement accuracy is not very good. Program with self-test function, support a variety of parameters calibration. Support frequency generator function, output by TP2, output frequency range from 1Hz to 2MHz. Support a fixed frequency signal output from the TP2, you can adjust the duty cycle by the button. Special attention: The capacitor must be discharged before testing the capacitor, otherwise it may damage the test pin. When testing the components on the circuit board, it is necessary to disconnect the power supply on the circuit board, and the residual voltage is not allowed on the test equipment. Hardware circuit: Each interface is illustrated as follows: J1: 2.54-2PIN white seat is used to input DC 7~12V voltage; S1: red button, reset button; S2: green button, operation button, used for one button operation of the entire circuit board; Instructions: 1. Components placed The transistor tester is very simple, and the test pins TP1, TP2 and TP3 are all in sequence. For only two pins, the components only need to be placed to any two test pins. For three pins of the components, randomly placed three test pins. Two resistors and two diodes can be tested at the same time. 2. Press the S1 reset button to shut down, and then press the S2 boot key to start a new measurement. 3. After the start of the long press S2 (more than 1S), enter the additional function selection interface, after a short press for moving the cursor on the attachment, long into the function interface button corresponding to the cursor interface, the various functions are as follows: Package included: 1 x ATmega328 digital transistor tester kits with shell

Specifications: Voltage supply: 9-12V DC Input Waveforms: Square, Sine & Triangle Impedance: 600 Ohm + 10% Frequency: 1Hz - 1MHz SINE wave: Amplitude: 0 - 3V at 9V DC input Distortion: Less than 1% (at 1kHz) Flatness: +0.05dB 1Hz - 100kHz SQUARE wave: Amplitude: 8V (no load) at 9V DC input Rise Time: Less than 50ns (at 1kHz) Fall Time: Less than 30ns (at 1kHz) Symmetry: Less than 5% (at 1kHz) TRIANGLE wave: Amplitude: 0 - 3V at 9V DC input Linearity: Less than 1% (up to 100kHz) 10mA Instruction: Click to open Package included: 3 x XR2206 Function Signal Generator DIY Kit  

ANENG Q1 9999 Counts True RMS Digital Multimeter AC DC Voltage Current Tester O Package weight: 0.40 kg Features: 1. True RMS 2. NCV 3. Auto and manual ranges selectable 4. Analog bar graph 5. Black EBTN screen Specifications: Capacitance: 9.99nF/99.99nF/999.9nF/9.99uF/99.99uF/999.9uF/9.999MF Voltage: 999.9mV/9.999V/99.99V/999.9V Current: 999.9uA/99.99uA/999.9mA/10A Resistance: 99.99/999.9/9.999k/99.99k/999.9K/9.999M/99.99M Ohm Frequency: 99.99Hz/999.9Hz/9.999KHz/99.99KHz/999.9KHz/5MHz Temperature: -20￢ﾄﾃ~1000￢ﾄﾃ/-4￢ﾄﾉ-1832￢ﾄﾉ Display Type: Digital Display Diode Test: Yes Continuity: Yes Duty Cycle: 1%-99% Sample Rate: 3 times per second Power: 2 x 1.5V AA batteries(Not Included) DIY Supplies: Electrical Operating Mode: Auto/Manual Ranging Operating Temperature: 0 - 40 ￢ﾄﾃ Operating Humidity: ≤75%RH Storage Condition: -20~60￢ﾄﾃ Storage Humidity: ≤80%RH Package Included: 1 x ANENG Q1 9999 Counts True RMS Digital Multimeter 1 x 16 in 1 Multifunctional Test Line 2 x Test Probe 1 x Temperature Sensor 1 x Storage Bag 1 x English User Manual Detail Pictures: Click here for more deals ANENG Q1 9999 Counts True RMS Digital Multimeter AC DC Voltage Current Tester O ANENG Q1 9999 Counts True RMS Digital Multimeter AC DC Voltage Current Tester O