tag:blogger.com,1999:blog-1107814481501412267.post6071807519814863050..comments2023-12-29T00:44:38.398-06:00Comments on Radio Theory and design: LDO low voltage - pinned vs surface mount componentsUnknownnoreply@blogger.comBlogger3125tag:blogger.com,1999:blog-1107814481501412267.post-13658441370698017862021-09-03T16:08:39.589-05:002021-09-03T16:08:39.589-05:00So I have a 3 volt supply and Lambda Diode to feed...So I have a 3 volt supply and Lambda Diode to feed a DBM.<br />The common problem with a direct conversion radio made with the DBM is the Local Oscillator and the RF signal are the same frequency so the oscillator must be shielded to prevent overloading the RF circuit.<br />One simple work around is to use an IF to off set the signals.<br />So the project shifts course.<br />Resethttps://www.blogger.com/profile/05162091506787629772noreply@blogger.comtag:blogger.com,1999:blog-1107814481501412267.post-18710660889896163092021-09-03T15:59:55.248-05:002021-09-03T15:59:55.248-05:00I bought a 6 volt lantern battery which had been d...I bought a 6 volt lantern battery which had been dropped (or otherwise mistreated). It was 4.5 volts. I opened it up and found a shorted cell. The positive terminal bonding strap was pressed against the shell. I had 3 cells looking for a project. My first project was to use 1 cell. I put the K2539 and J175 Lamda on a board and connected it to my bench power supply. The thing sings at a little over 1.5 volts so I am modifying the project to use 3 volts. Resethttps://www.blogger.com/profile/05162091506787629772noreply@blogger.comtag:blogger.com,1999:blog-1107814481501412267.post-16713268807460013092021-09-03T07:09:25.574-05:002021-09-03T07:09:25.574-05:00My designs now are geared towards using Li-Ion, 3....My designs now are geared towards using Li-Ion, 3.7-4.2 volts. They are easy to recharge and are becoming more affordable. Discarded cell phone charger are also plentiful.Eduardohttps://www.blogger.com/profile/16730258027998972975noreply@blogger.com