====== LIGHTNING / ELECTROSTATIC DISCHARGE DETECTION =======

===== ARDUINO BASED LIGHTNING DETECTOR =====
  * https://create.arduino.cc/projecthub/runtimeprojects/a-lightning-detector-for-arduino-9f679c


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===== SCHEMATICS =====
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(Transistors : 2N3904)
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Transistor FET = BF245
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===== PROJECTS =====
  * {{ :projets:meteorology:lightning_detector:lennies_lightning_detector-2.pdf |}}
===== TRANSISTORS CHARACTERISTICS & EQUIVALENCE FOR (OLD) PROJECTS ABOVE (USING OLD OR DISCONTINUED TRANSISTORS) =====

==== 2N4401 ====
{{projets:meteorology:lightning_detector:2n4401-pinout.png?direct|}}

=== FEATURES ===
  * General purpose NPN Transistor
  * High DC Current Gain (hFE), typically 80 when IC=10mA
  * Continuous Collector current (IC) is 500mA
  * Collector-Emitter voltage (VCE) is 40 V
  * Collector-Base voltage (VCB) is 60V
  * Emitter Base Breakdown Voltage (VBE) is 6V
  * Transition Frequency is 100MHz
  * Available in To-92 Package

=== ALTERNATIVES ===
  * BC549
  * BC636
  * BC639
  * BC547
  * 2N2369
  * 2N3055
  * 2N3904
  * 2N3906
  * 2SC5200
  * 2N551

=== EQUIVALENTS ===
  * 2N3904
  * 2N2222A

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==== 2N4403 ====
{{projets:meteorology:lightning_detector:2n4403-pinout.jpg?direct|}}

=== FEATURES ===
  * Type - PNP
  * Collector-Emitter Voltage: -40 V
  * Collector-Base Voltage: -40 V
  * Emitter-Base Voltage: -5 V
  * Collector Current: -0.6 A
  * Collector Dissipation - 0.625 W
  * DC Current Gain (hfe) - 100 to 300
  * Transition Frequency - 200 MHz
  * Operating and Storage Junction Temperature Range -55 to +150 °C
  * Package - TO-92

=== REPLACEMENTS & EQUIVALENTS ===
  * 2SA708
  * BC527
  * BC528
  * KN2907
  * KN2907A
  * KSA708
  * KSP2907A
  * KTN2907
  * KTN2907A
  * MPS2907
  * MPS2907A
  * MPS2907AG
  * MPS2907G
  * MPS4354
  * MPS4355
  * MPS750
  * MPS750G
  * MPS751
  * MPS751G
  * MPSW51A
  * MPSW51AG
  * P2N2907A
  * P2N2907AG
  * PN2905
  * PN2905A
  * PN2907
  * PN2907A
  * ZTX550
  * ZTX951

=== SMD VERSIONS ===
  * 2SA1518 (SOT-23)
  * 2SA1519 (SOT-23)
  * 2SA1520 (SOT-23)
  * 2SA1521 (SOT-23)
  * BC807 (SOT-23)
  * BC807W (SOT-323)
  * BCX17 (SOT-23)
  * KST4403 (SOT-23)
  * MMBT4403 (SOT-23)
  * MMST4403 (SOT-323)
  * PMBT4403 (SOT-23)
  * PMST4403 (SOT-323)

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==== BF245 ====
{{projets:meteorology:lightning_detector:bf245-pinout-equivalent.gif?400|}}

=== FEATURES ===
  * Package Type: TO-92
  * Transistor Type: N Channel JFET
  * Max Voltage Applied From Drain to Source: 30Vdc
  * Max Drain to Gate Voltage: 30V
  * Max Reverse Gate to Source Voltage: –30Vdc
  * Max Continues Drain Current: 25mA
  * Minimum to Maximum Gate to Source Cuttoff Voltage : -0.5 to –0 Vdc
  * Max Power Dissipation: 300mW
  * Max Storage & Operating temperature: -55 to +150 Centigrade
  * Low Noise & High Gain

=== REPLACEMENT & EQUIVALENT ===
  * BF245B, BF245C
  * 2N5457
  * 2SK117
  * MPF102
  * 2N5458
  * BF244A
  * BF256A
  * NTE457
  * J113
  * 2N3819

Other nearest Possible replacements are
  * 2N4416
  * NTE312
  * 2N5638
  * 2N5640
  * 2SK162
  * 2SK518

<WRAP left round important 33%>
(Always check pin configuration of the transistor you are replacing with the BF245.)
</WRAP>
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