Ian's Blog - Electronics-DiscreteOh god... how did this get here? I am not good with computer.tag:joshianlindsay.com,2005:63187d1266ad21283196e7e2f3ed692f/Electronics-DiscreteTextpattern2023-12-09T10:30:40ZIanhttp://joshianlindsay.com/Ian2022-02-23T04:35:53Z2022-02-23T04:37:48Z2022.02.22: H-bridge deadband sequencertag:joshianlindsay.com,2022-02-22:63187d1266ad21283196e7e2f3ed692f/2cd5710ac96a647c71a1a3dfd1dad44b
This is a logic-level front-end to an H-bridge that provides deadband enforcement. This particular circuit supports 4-channels; sufficient for two H-bridges.]]>
Ian2014-05-27T15:35:03Z2018-11-28T03:31:55ZCrosspoint Audio Router with Volume Controltag:joshianlindsay.com,2014-05-09:63187d1266ad21283196e7e2f3ed692f/a5f81ea95c5f2e8f9a2966b2d3713e6c
I've been needing this part for a long time now. So I've finally gotten around to doing the design work and making a production-worthy module.]]>
Ian2009-07-05T19:12:55Z2013-09-13T05:50:07ZHand Replacement of large non-BGA surface-mount IC'stag:joshianlindsay.com,2009-07-05:63187d1266ad21283196e7e2f3ed692f/907dc6a28de4e22fd79c2ec190a2214b
This is another procedure I wrote while doing camera repair. Occasionally, there was an identifiable chip that would go bad, but which replacement was considered impossible at our small shop. The alternative was replacing the entire PCB that it was mounted on, which would be an order of magnitude more expensive.]]>
Ian2009-05-16T07:14:26Z2018-11-28T03:01:07ZThe Laser Microphonetag:joshianlindsay.com,2009-05-16:63187d1266ad21283196e7e2f3ed692f/d15c32ecda3e0deeed78e7fce98e103b
Here is yet another un-intentionally wonderful product of the Cold War. This device is designed to detect slight disturbances in the reflection of a laser beam and convert them into sound. Very nifty to use!]]>
Ian2009-05-16T06:58:32Z2018-11-28T02:59:41ZA capacitance meter built from discrete ICstag:joshianlindsay.com,2009-05-16:63187d1266ad21283196e7e2f3ed692f/2e1c3fb7aaf1909b062995f7e0e2cfd1
Not much to say about this one. It was a project that I saw in an issue of Popular Electronics before it became Poptronics. It is a capacitance meter built from discrete ICs. It creates an RC oscillator and counts the number of wave-fronts over a given period of time to arrive at a value for the unknown capacitance.]]>