All Sections: Fairchild

1. Double-duty current loop transmitter
   Stephen Woodward
   Circuits Fairchild LM317
   .. contacts reliably? Woodward, Stephen. Silly simple precision 0/20mA to 4/20mA converter. Materials on the topic Datasheet Fairchild LM317
   Apr 15, 2026

2. Laser scanning microscope from Blu-ray player
   Doctor Volt
   Circuits Microchip MCP6004
   .. on the topic Datasheet Allegro A4988 Datasheet Texas Instruments L293 Datasheet STMicroelectronics L7805 Datasheet Fairchild LM317 Datasheet Microchip MCP6004 Datasheet STMicroelectronics BD677 Downloads OpenCV.js port of the ...
   Apr 1, 2026
3. A fully floating BJT-based LED current driver
   Luca Bruno
   Articles Fairchild BC550C BC557B
   .. with a negative temperature coefficient for R1 can partially compensate for this effect. Materials on the topic Datasheet Fairchild BC550C Datasheet Fairchild BC557B
   Apr 1, 2026
4. An LM317-based 0-20 mA to 4-20 mA 2-wire converter
   Ashutosh Sapre
   Circuits Fairchild LM317
   .. Reference Sapre, Ashutosh. Another silly simple precision 0/20mA to 4/20mA converter. Materials on the topic Datasheet Fairchild LM317 Datasheet STMicroelectronics BD140
   Mar 5, 2026
5. Silly simple supply sequencing
   Stephen Woodward
   Circuits Texas Instruments CD40106B
   .. for sequential operation of multiple power supplies. Materials on the topic Datasheet Texas Instruments CD40106B Datasheet Fairchild MM74C14 Datasheet Texas Instruments LMC555
   Feb 23, 2026
6. Charge coupled MOSFET relay
   David A. Johnson
   Circuits Inchange Semiconductor IRFZ48Z
   .. isolation will drawing only 1.5 mA of current. Materials on the topic Datasheet Inchange Semiconductor IRFZ48Z Datasheet Fairchild MM74C14 discovercircuits.com
   Jan 22, 2026
7. SCR topology transmogrifies into BJT two-wire precision current source
   Stephen Woodward
   Circuits Fairchild LM317
   .. or just weird. Reference Paul, Christopher. A precision, voltage-compliant current source. Materials on the topic Datasheet Fairchild LM317 Datasheet Diodes TLV431 Datasheet ON Semiconductor TIP31
   Jan 15, 2026
8. Two-wire precision current source with wide current range
   Stephen Woodward
   Circuits Analog Devices LM4041
   .. big and fat. Reference Paul, Christopher. A precision, voltage-compliant current source. Materials on the topic Datasheet Fairchild LM317 Datasheet Analog Devices LM4041 Datasheet Texas Instruments OPA2196 Datasheet ON Semiconductor ...
   Dec 18, 2025
9. Solar mason jar light
   David A. Johnson
   Circuits Toshiba TC4S584F
   .. heat sink. Materials on the topic Datasheet onsemi NC7SZ14 Datasheet Toshiba TC4S584F Datasheet Diodes ZXM61N02F Datasheet Fairchild 1N5817 discovercircuits.com
   Dec 10, 2025
10. A digital frequency detector
    Ariel Benvenuto
    Circuits Texas Instruments SN74AC10 SN74HC74
    .. output goes low. Materials on the topic Datasheet Texas Instruments SN74AC10 Datasheet Texas Instruments SN74HC74 Datasheet Fairchild 74AC169
    Oct 14, 2025

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