In this video I show you how to make a UV Exposure Unit which can be used to produce printed circuit boards. We will use a cheap UV insect killer unit and modify it to do the job. For this project I used a 20W High Powered Insect Killer from Maplin (Product Code N98GR) cost […]
Category: Projects
Build a Function Generator Part 2
This is part 2 of the building a function generator. We cover the output stage and discuss some changes to the original design. Finally, we build the project in to a case and test. Below are the links to the latest main schematic diagram and a second file for the Display and Arduino schematic. Also […]
Build a Function Generator – Part 1
This is the first part of a project in which we will design an build a function generator capable of providing a sine, triangle, square, pulse and ramp wave-forms. We will be using the XR2206 function generator I.C. A 8 digit 7 segment display will be used to display the frequency. The software for the […]
Upgrade to 5 Volt Precision Reference Standard – Part 2
This is Part 2 of the upgrade project to allow the 5 volt Precision Reference standard covered in my previous video to be switched to give 100mV, 1V, 5V and 10V outputs. In this final part I will cover the final build on a custom PCB, calibrate and box the unit. The link to Part […]
5 Volt Precision Reference Standard Upgrade – Part 1
This project will be in two parts. This first part here covers the circuit upgrade to allow the 5 volt Precision Reference standard covered in my previous video to be switched to give 100mV, 1V, 5V and 10V outputs. We will test the upgrade circuit on a breadboard and show how it can be simply […]
Design & Build 5 Volt Reference Standard
This project is for the hobbyist to design and build a 5 volt precision voltage reference standard that requires no adjustment but still has an accuracy of ±0.01% or better and a temperature coefficient of ±3 ppm/ºC. Also incorporating an auto switch-off and battery monitor feature. PARTS LIST: 1 x Intersil ISL21009BFB850Z, Precision 5V Voltage […]
Building a Constant Current Source Box
This project is to build a small Precision Constant Current Source Box which will give a 1mA and 10mA switched output which could be used to check the calibration of a digital multimeter. This project uses the LT3092 programmable two terminal constant current I.C.
GPS System with Arduino Mini & OLED Display
Building a simple small portable GPS system which will gave date and time plus Altitude, Number of Satellites detected, Longitude and Latitude. Software Code for this project can be downloaded from the link below: Project source code Parts List: GPS Module (GY-NEO6MV2 ublox) with antenna Arduino Pro Mini Module (Atmega 328 5volt 16mHz) 128×64 OLED […]
Convert 240v AC PIR Floodlight to 12v DC LED
In this project I show you how to convert a 220-240v A.C. PIR Floodlight to a 12v D.C. 10 watt LED for use on a 12v battery supply. Both construction and circuit board changes are covered in detail. Circuit description and information on using the PT4115 integrated circuit to control LED current. The 10 watt […]
Design & Building a Precision Voltage Reference Box
In this project I take you through designing, testing and building a precision voltage reference standard box giving both 10 and 5 volts to an accuracy of ±0.025% or better with out any adjustment. With the addition of a trim circuit the accuracy can be increased to ±0.0005% or better. Using standard available components it […]