Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
To help support Julian's Postbag videos via Patreon: https://www.patreon.com/julian256
ETI Vocoder constructional project reproduced with kind permission: Wimborne Publishing Ltd. http://www.epemag.com
https://en.wikipedia.org/wiki/74181
eBay Listings:
10pcs ORIGINAL LM348N LM348 QUADRUPLE OPERATIONAL AMPLIFIERS https://www.ebay.com/itm/-/282550056828
100x Red Fork Connector Electrical Crimp Terminals for Cable 4.3mm https://www.ebay.com/itm/-/131914284638
10PCS HT7550-1 0.1A 5V Low Dropout Voltage Regulator IC LDO SOT-89 https://www.ebay.com/itm/-/401504607457
SN74LS381N SemiConductor https://www.ebay.com/itm/-/172883284288
To help support Julian's Postbag videos via Patreon: https://www.patreon.com/julian256
ETI Vocoder constructional project reproduced with kind permission: Wimborne Publishing Ltd. http://www.epemag.com
https://en.wikipedia.org/wiki/74181
eBay Listings:
10pcs ORIGINAL LM348N LM348 QUADRUPLE OPERATIONAL AMPLIFIERS https://www.ebay.com/itm/-/282550056828
100x Red Fork Connector Electrical Crimp Terminals for Cable 4.3mm https://www.ebay.com/itm/-/131914284638
10PCS HT7550-1 0.1A 5V Low Dropout Voltage Regulator IC LDO SOT-89 https://www.ebay.com/itm/-/401504607457
SN74LS381N SemiConductor https://www.ebay.com/itm/-/172883284288
What a waste of money for 74381. You could program an eeprom to do the same thing. Use data bus for A and address bus for B. Use the rest of address bus lines for your function. I believe you can do 4 bit AxB also with an 8 bit eeprom.
Hey Julian, I took a test last week of a subject regarding pretty much an overview of both sequential and combinational systems. I'm quite interested in the ALU design you mentioned. Would you further explore it in a video? It is actually one of the problems that were on the test and I was completely clueless on where to start.
Thank you in advance.
I see the word postbag in the title, I click on it, it's simple.
One caveat with the HT75xx regulators: they apparently require a nominal ESR from tantalums etc, and will become unstable with purely ceramic caps. Learnt it the hard way when I tried to power ESP8266 with these and spent countless hours troubleshooting.
Thanks for the shout out Julian. Great to meet you 🙂
I'm trying to cope up with high school this afternoon. Believe me, things are bad here.
What am I doing this afternoon? Well, evening for me. I'm pulling a dud 3-cell Ni-mh battery out of a wind-to-charge torch and replacing it with a small, protected Li-ion cell. The lithium cell has a far lower mAh rating but it'll be enough for an emergency.
Thank you for asking, Julian. 😉
Now I'm in something of a quandary as to what to do with the old battery pack. Do I try to find a replacement cell and repair the original battery pack, or do I scrap the lot? Or is there something else I could use the two good cells in, since only one of the cells is dead? We shall see.
Greets Reece and other fans
What am I doing? I should be working, therefore I watch you open your post.
It would be interesting to implement the whole VOCODER using a Texas Instruments Blackfin DSP processor chip and using the source code for a 30 channel VOCODER and compile it for the Blackfin DSP processor chip and would save a lot of hassle and space.
Take ya a silver marker, any light color. Put a dot on your pcb to represent direction of chip install. I admit it, I have fried a few by wrong direction. Dot on the board and the chip helps. Keep up the video's, desperate to see that vocoder.
Just wondering could that "for Cable 4.3mm" mean that it's for cable that is 4.3mm and has nothing to do with how wide the fork is?