119 Results for "pnp"

Adventures in Time: Integrated Injection Logic
Details from Adventures in Time: Integrated Injection Logic
An excellent explanation of Integrated-Injection Logic (I2L) is in the classic IEEE paper from R. A. Pedersen of Bell Labs. In the early 1970s, MOSFET logic had not evolved into the high-speed technology that NMOS in the mid-late 1970s and CMOS in the...

PROBADOR DE TRANSISTORES BJT
Details from PROBADOR DE TRANSISTORES BJT
Primeramente diseñaremos en diagrama esquemático y también simularemos el proyecto en el software PROTEUS Vemos dos circuitos ya que para este proyecto hemos desarrollado para los transistores BJT tanto para PNP y NPN. Veremos el...

2SA1943 silicon PNP power transistor, Utsource
Details from 2SA1943 silicon PNP power transistor, Utsource
2SA1943 2SA1943 is a silicon PNP power transistor consist of triple diffuse technology. 2SA1943 comes in robust TO220-IS package with an inbuilt large heat sink as the back plain of the 2SA1943 transistor. It is recommended to use 2SA1943 in power amplifier...

Bipolar Discrete UART
Details from Bipolar Discrete UART
The project description changes with the project itself... New and better ideas have emerged and the original idea is now obsolete but here it is : (obsolete) The principle is very simple and both the receiver and the emitter are based around the same...

EBAY 3020 CNC Replacement CPU Board
Details from EBAY 3020 CNC Replacement CPU Board
This is for the large blue box version of the YOOCNC 3020/6040, since it fits in the existing PCB stand offs and uses the same connectors.I added inputs for limit switches etc, so they just have to be run around the machine and a few micro switches added...

14 digit 7-segment vane display
Details from 14 digit 7-segment vane display
The display unit with 14 individual 7-segment vane displays was purchased from someone selling a whole gas pump but had no information about the control of the display module.The pcb (made 1985) basically contains the 14 vane displays, a lot of diodes,...

YAPR
Details from YAPR
I'm trying to build a production-ready pick and place machine for prototyping and small production runs. The goal is to have the components loaded in the feeders all the time, so populating a new design is just a matter of sticking the boards in and...

Single cell LED flasher
Details from Single cell LED flasher
I tip my hat to the "Pigeon's Nest" webmaster, who designed the circuit. Just two transistors, it makes one wonder why they invented the LM3909. He said that the low VCE saturation voltage of the NPN transistor was essential for best efficiency. The...

GEVINO TFT 7"
Details from GEVINO TFT 7"
Frame in black acrylic panel mounting. Front USB socket for reading writing USB Memory Stick Removable Terminal pitch 3.5mm Power 12V / 24V 4 analogue inputs 0 = 10V or 4-20mA 1 Analog output 0-10V or 4-20mA (Loses an analog input) 8 optocoupled outputs,...

Bill of Materials CSV Tool in Python for Eagle
Details from Bill of Materials CSV Tool in Python for Eagle
What the script does: 1. It strips empty lines and useless header stuff ("Exported from example.sch at 01-03-2021 15:34", "EAGLE Version 9.6.2 Copyright (c) 1988-2020 Autodesk, Inc.", etc) from the BOM file. 2. It saves this stripped information to a...

Power Crackle Music using Unusual Op-amp
Details from Power Crackle Music using Unusual Op-amp
Here is the original crackle box schematic: All the U* devices can be replaced with a K157ya1: My first experiments connect it up this way: To make it even louder I have set this up with a dual supply (2x 9v batteries). This does exhibit much of...

Vespa 50 Special electronic turn signal relay
Details from Vespa 50 Special electronic turn signal relay
0a. Electronic stuff is made of magic (smoke):0b. Ok, let's draw it a bit more professional:1. a bridge rectifier ensures the right polarity.2. a resistor charges a capacitor, a voltage divider triggers a triac after some time:3. the triac shortens the...

Discrete Component Logic Family
Details from Discrete Component Logic Family
The purpose of this project is to design a set of logic circuit families using discrete transistors. I started with the idea of building a CPU or computer out of discrete components and searched the Internet for classic logic designs using Diode Transistor...

Transistor Tester
Details from Transistor Tester
Operating Instructions Precautions It should be noted that the test inputs do not have a protective circuit. A protective circuit would probably also falsify the measurement results. Always discharge the capacitors before connecting them to...

CHANGER - a toolchanger new interpreted
Details from CHANGER - a toolchanger new interpreted
Important Note: This Project is still work in progress and will be officially released with a proper YT-trailer. Current To Do's: Testing the directdrive toolheadDecision for top-lid/enclosureTesting custom tFreeN.g, tPre.Ng and tPostN.g macrosCalibration...

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