Content of the section "Others":

|— circuits and articles ——————————————— [are not included in other sections of the website]

|— radiohlamer's tehnology and methods — [how to measure, to drill, to glue, to tear off...]

|— reference books ————————————————————— [any reference information]

Circuits and articles:

Scheme, description and calculation of single-channel relay module with galvanic isolation + how to make USB relay with this module... Read more
Опубликовано в разделе: others ✎ Author: rhf-admin
An article on how to connect temperature sensor DS18B20 to the gateway RH-0004 and get a USB thermometer with the ability to transfer data via network... Read more
published in: others ✎ Author: rhf-admin
Circuit and description of the powerful, handmade half-bridge cascade, which allowing you independent control of the upper and lower transistor shoulders of the half-bridge.... Read more
published in: others ✎ Author: rhf-admin
Circuit and description of the simple homemade MOSFET driver. This driver is assembled on details which were removed from old motherboards, and it allows you to control both types of MOSFET (N- and P-channel) in any low-voltage circuits (up to 20V)... Read more
published in: others ✎ Author: rhf-admin
Low-power, stable current sourse for measuring working voltage of Zener diodes and LEDs... Read more
published in: others ✎ Author: rhf-admin
Universal USB to COM converter on the cp2102 chip. We divide the classical scheme into two parts and get three converters in one as result: USB to COM, USB to UART and COM to UART. This device emulates all com-port lines... Read more
published in: others ✎ Author: rhf-admin
Making an acoustic repeater for scooter's signal lamps from old beeper and 555 timer... Read more
published in: others ✎ Authors: Rus_lan, rhf-admin
Why does an incandescent lamp burn out? How to increase an incandescent lamp life with soft start + scheme and decription of a simple soft start device... Read more
published in: others ✎ Authors: Rus_lan, rhf-admin
How to make some money by collecting non-ferrous metal scrap from old electronic equipment... Read more
published in: others ✎ Author: Bars
Chips MAX7219 and MAX7221: pinout, control, connection scheme... Read more
published in: others ✎ Author: rhf-admin
Circuit and description of the simple device for the IR remotes scanning and testing via PC... Read more
published in: others ✎ Author: rhf-admin
A circuit and description of an electret microphone amplifier for connect to the PC (based on inverting amplifier) + simple highly directional microphone making... Read more
published in: others ✎ Author: rhf-admin
Theory and scheme of load current regulation using an operational amplifier, but also example calculations and improvised driver for cell phone backlight led... Read more
published in: others ✎ Author: rhf-admin
How to make improvised electronic load: scheme, description and calculations. With a powerful MOSFET as equivalent load resistance... Read more
published in: others ✎ Author: rhf-admin
Scheme of the level converter RS232-TTL on the chip MAX232 + PCB and little research on the issue of of capacitors strapping valid values... Read more
published in: others ✎ Author: rhf-admin

Radiohlamer's technology and methods:

How to make a simple and handy adapters to connect the SOIC chips from the old motherboard PCI sockets... Read more
published in: others ✎ Author: rhf-admin
Handmade microdrill for PCB
22 January 2015
Small manual for making microdrill for printed-circuit boards from the old printer's electric motor + small secret of drilling the equal rows of holes... Read more
published in: others ✎ Author: krikuchin
Detailed description of the process of making a PCB with laser-ironing technology (LIT) (with pictures)... Read more
published in: others ✎ Author: rhf-admin
A circuit and description of measuring capacitors and inductors parameters using generator of sinus and oscilloscope. + online-calculator... Read more
published in: others ✎ Author: rhf-admin
Basic method of reeling the pulse transformers for power supplies... Read more
published in: others ✎ Author: rhf-admin

Reference books:

This PDF-document contains the reference data on the power inductors CDRH series by Sumida, which designed specially for power supplies...Read more
posted in: others ✎ uploaded by rhf-admin
This PDF-document contains reference data on ferrite N87 from Epcos, which is the base material in the Epcos ferrite line for switching converters... download (eng)
posted in: others ✎ uploaded by rhf-admin
Algorithms for switching in program mode, valid ranges of programming voltage, pins for download a program... Read more
published in: others ✎ Author: rhf-admin
Format of *.hex files
1 August 2012
Format description of Intel-hex files: purpose, structure, types of strings, CRC calculation... Read more
published in: others ✎ Author: rhf-admin
Plastic card with magnetic stripe: size, number and location of data tracks, formats of card data... Read more
published in: others ✎ Author: rhf-admin
Ways of various capacitors marking, including SMD-capacitors... Read more
published in: others ✎ Author: rhf-admin
Ways of various resistors marking, including SMD-resistors... Read more
published in: others ✎ Author: rhf-admin
Ways of various inductors marking, including SMD-inductors... Read more
published in: others ✎ Author: rhf-admin
Relevance between measured in AWG and SI wires... Read more
published in: others ✎ Author: rhf-admin
Base sizes and the maximum power of pulse transformer cores when they using without protective clearance ( EF12.6 , EE13 , EF16 , EE16 , EE19 , EI22 , EE22 , EF20 , EI25 , EE25 , EF25 , EI28 , EE28 , EI30 , EE30 , EER28 , EI35 , EE35 , EE40 , EI40 , EER35 , EER40 )... Read more
published in: others ✎ Author: rhf-admin
 
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