Led traffic lights
An unusual implementation of LED traffic lights. This is a programmable unit employing a 2k byte CMOS static RAM chip…
Free energy? – cmos microchip works with no vdd and no gnd
Clickbait title, sorry (but only the 'free-energy' lunatics will fall for it). After connecting a 74HCT138 CMOS decoder chip the…
Testing the reflow-soldered smd integrated circuits
Building a little test circuit for the reflow-soldered 74HCT138 integrated circuits. 7 out of 7 worked. Awesome result :)
Second attempt: smd reflow soldering
Improvements to my mini reflow oven, and I'm learning that too much solder paste is causing the bridges between pins.
First attempt: smd reflow soldering
An ultra-low-cost attempt to reflow solder an SMD onto a PCB. Kinda half works, but it needs refinement.
Julian’s electronics postbag: #114 – solder paste
A video in which I open my post :) Huge thanks to the wonderful people who support my channel via…
First look: isdt c4 battery charger from banggood
Battery charger supports 4 cell sizes and a range of different chemistries. ISDT C4 Battery Charger on banggood.com: http://bit.ly/2EXVSL2
Not flashing led – super simple constant current circuit
How to stop an LED from flashing when the supply voltage is swinging wildly between 5v and 10v.