In this article I look at a kit called the 30PCS 74LSxx Series NAND Gates Logic IC Kit and discover if its good value and should you buy it
Lets see an image of the kit that I received, you can see I have used a couple of the individual chips
30PCS 74LSxx Series NAND Gates Logic IC Ki
Parts
Here is a list of parts in the kit
The prices are the quoted prices for 1 on the RS components site in pounds, some of these can only be bought in quantities of 5 or more
You may be able to find better deals shopping around
| SN74LS00N 1PCS | Quad 2-Input NAND Logic Gate, 14-Pin PDIP | 0.739 |
| SN74LS02N 1PCS | Quad 2-Input NOR Logic Gate, 14-Pin PDIP | 0.84 |
| SN74LS03N 1PCS | Quad 2-Input NAND Logic Gate, 14-Pin PDIP | 0.748 |
| SN74LS04N 1PCS | Hex Inverter, 14-Pin PDIP | 0.865 |
| SN74LS05N 1PCS | Hex Inverter, 14-Pin PDIP | 1.18 |
| SN74LS06N 1PCS | Hex Inverter, 14-Pin PDIP | 1.381 |
| SN74LS07N 1PCS | Hex-Channel Buffer & Line Driver, Open Collector, 14-Pin PDIP | 1.01 |
| SN74LS08N 1PCS | Quad 2-Input AND Logic Gate, 14-Pin PDIP | 0.794 |
| SN74LS11N 1PCS | Triple 3-Input AND Logic Gate, 14-Pin PDIP | 0.98 |
| SN74LS14N 1PCS | Hex Schmitt Trigger Inverter, 14-Pin PDIP | 0.83 |
| SN74LS32N 1PCS | Quad 2-Input OR Logic Gate, 14-Pin PDIP | 0.725 |
| SN74LS74N 1PCS | Dual D Type Flip Flop IC, 14-Pin PDIP | 0.57 |
| SN74LS86N 1PCS | Quad 2 Input XOR | 0.61 |
| SN74LS112N 1PCS | Dual JK Type Flip Flop IC, 16-Pin PDIP | 0.98 |
| SN74LS123N 1PCS | Dual Monostable Multivibrator 8mA, 16-Pin | 1.02 |
| SN74LS125N 1PCS | Quad-Channel Buffer & Line Driver, 3-State, 14-Pin PDIP | 0.711 |
| SN74LS132N 1PCS | Quad 2-Input NANDSchmitt Trigger Logic Gate, 14-Pin PDIP | 0.31 |
| SN74LS138N 1PCS | Decoder, 16-Pin PDIP | 1.111 |
| SN74LS139N 1PCS | Decoder, 16-Pin PDIP | 1 |
| SN74LS157N 1PCS | Multiplexer Quad | 0.743 |
| SN74LS163N 1PCS | 4-stage Surface Mount Binary Counter HC, 16-Pin | 0.743 |
| SN74LS164N 1PCS | 8-stage Through Hole Shift Register HC, 14-Pin PDIP | 1.04 |
| SN74LS166N 1PCS | Serial-out shift Registers | 1.02 |
| SN74LS221N 1PCS | Dual Monostable Multivibrator 8mA, 16-Pin PDIP | 1.318 |
| SN74LS240N 1PCS | Octal-Channel Buffer & Line Driver, 3-State, Inverting, 20-Pin PDIP | 1.21 |
| SN74LS244N 1PCS | Octal-Channel Buffer & Line Driver, 3-State, 20-Pin PDIP | 1.21 |
| SN74LS245N 1PCS | 1 Bus Transceiver, 8-Bit Non-Inverting CMOS, 20-Pin PDIP | 1.058 |
| SN74LS273N 1PCS | Octal D Type Flip Flop IC, 20-Pin PDIP | 1.22 |
| SN74LS373N 1PCS | 8bit-Bit Latch, Transparent D Type, 3 State, 20-Pin PDIP | 1.03 |
| SN74LS374N 1PCS | Octal D Type Flip Flop IC, 3-State, 20-Pin P | 1.213 |
| 28.209 |
Prices
Originally bough these on Aliexpress but couldn’t find them there but here are 3 sources and the prices when I visited the website
| Amazon COM | $22 |
| Amazon UK | £21 |
Summary
This one turned out to better value than the previous TTL kit that I wrote an article about.
If I was able to find a usage for ALL of the chips then that would be a saving of around £7 than buying the ICs individually, the key word here is ‘if’ I could use them all.
As you can see its a decent selection of ICs but there are 3 hex inverters and 2 decoders – the inverters have slightly different characteristics
SN74LS04 Hex inverters
SN74LS05 Hex inverters with open collector outputs
SN74LS06 Hex inverter buffers / drivers with high-voltage outputs
They should be interchangeable but again you are getting 3 of them.
Again, for a site like this and maybe other educational resources the kit maybe useful for demonstrating logic ICs but once again this kit is not recommended