{"title":"Kits","description":"\u003cp\u003eElectronics Kits With Fully Detailed Online Instructions\u003c\/p\u003e","products":[{"product_id":"crystal-set-radio-kit-with-full-online-instructions-and-transistor-option","title":"Crystal Set Radio Kit With Full Online Instructions And Transistor Option CBCSRK-1","description":"\u003cp\u003eCrystal Set Kit Portable Solderless With High Loudness Single Transistor Option\u003c\/p\u003e\n\u003cp\u003eThis is a kit of electronic parts which will allow you to build a good crystal set radio using modern parts as detailed in the full instructions provided online:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.usefulcomponents.com\/main_contents\/projects\/choccy_block_crystal_radio\/choccy_block_crystal_radio.html\"\u003ehttps:\/\/www.usefulcomponents.com\/main_contents\/projects\/choccy_block_crystal_radio\/choccy_block_crystal_radio.html\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eI have found it to be much better than the commercial plastic kits available thanks to the use of the output transformer and the use of an aerial input coupling coil. All the earphones are tested, something which you won't find elsewhere.\u003c\/p\u003e\n\u003cp\u003eThis is the Bill Of Materials:\u003c\/p\u003e\n\u003cp\u003e* 3 Amp terminal strip\u003cbr\u003e* LT44 transformer L2\u003cbr\u003e* variable capacitor VC1\u003cbr\u003e* 2 M2.5 4mm screws\u003cbr\u003e* 3 M2.5 20mm screws\u003cbr\u003e* 3 M2.5 nuts\u003cbr\u003e* 5 M2.5 washers\u003cbr\u003e* BAT48 Schottky diode D1\u003cbr\u003e* 470pF ceramic disc capacitor C1\u003cbr\u003e* ceramic \/ crystal earpiece Y1\u003cbr\u003e* 30SWG \/ 0.315mm enameled copper wire 4m\u003cbr\u003e* 1m yellow aerial connection wire\u003cbr\u003e* 1m green earth connection wire\u003cbr\u003e* 1 yellow insulated crocodile clip\u003cbr\u003e* 1 green insulated crocodile clip\u003cbr\u003e* control knob for short shaft\u003cbr\u003e* 50mm long, 9.5mm diameter ferrite rod\u003cbr\u003e* 300mm single core red hookup wire\u003cbr\u003e* 300mm single core black hookup wire\u003cbr\u003e* 1 2.2M carbon film resistor\u003cbr\u003e* 2 100nF ceramic disc capacitors\u003cbr\u003e* NPN BC549C high gain small signal transistor\u003cbr\u003e* Single AA battery holder\u003c\/p\u003e\n\u003cp\u003eAll the build information is provided online so that easy updates can be added. There is no paper documentation supplied.\u003c\/p\u003e\n\u003cp\u003eThe particular thing that I like about my kit versus so many others, is that if you live in a flat and can't put up a decent long-wire aerial, you can always go on a walk and attach this portable version to two wires on a long farm fence to get a signal.\u003c\/p\u003e\n\u003cp\u003eThe kit now comes with all the parts required to add a single transistor for much added loudness and sensitivity. This modification has minimal aerial requirements, so if you can't make the purist crystal set work at your house, the single transistor radio version should get you going. The level of additional complexity is minimal, and you only need one old AA battery to make it work. \u003cbr\u003e\u003cbr\u003eYou should be able to make this without further assistance if you're aged 14 or above.\u003c\/p\u003e","brand":"HJW Electronics","offers":[{"title":"Default Title","offer_id":58484525662592,"sku":"CBCSRK-1","price":21.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/files\/cbcsrk_1t_parts_s_218b2cd1-b190-4820-a2b1-5083417d23db.jpg?v=1784372585"},{"product_id":"flashing-light-flip-flop-kit-with-full-online-instructions-cbff-1","title":"Flashing Light Flip-Flop Kit With Full Online Instructions CBFF-1","description":"\u003cp\u003eTerminal Strip Alternate Flashing LED Light Flip-Flop Kit of Electronic Parts.\u003c\/p\u003e\n\u003cp\u003eThis is a kit of electronic parts for a transistor light flashing circuit which alternately flashes two sets of LEDs or lamps. It is built entirely without soldering using a 12-way 3A terminal strip. This is somewhat better than the simpler versions available elsewhere, in that it has two additional output driver transistors. This allows you to flash more than two little LEDs, or use proper bulbs as shown. All the build information is provided online so that easy updates can be added. The build information is full and detailed, and there's a full electronic explanation provided with oscilloscope screen-shots. Three different resistor values are provided for different flashing rates. If you're looking for a school science project which you can make in a hurry, then look no further. In addition you will need four AA batteries, a small screwdriver, some wire cutters, small pliers, and some means of stripping the insulation from the wire in addition to the above.\u003c\/p\u003e\n\u003cp\u003eHere is the link to the instruction pages:\u003cbr\u003e\u003cbr\u003ehttps:\/\/www.usefulcomponents.com\/main_contents\/projects\/flip_flop_1\/flip_flop_1.html\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003e Tried and tested design \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003e Requires no soldering \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003e All electronic parts included excepting batteries \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003e Instant school science project suitable for ages 14 and above \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003e Fully detailed instructions and technical documentation provided online \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HJW Electronics","offers":[{"title":"Default Title","offer_id":58499175285120,"sku":"CBFF-1","price":12.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/files\/cbff_1_pack_w.jpg?v=1784558589"},{"product_id":"hjw-electronics-choccy-block-terminal-strip-am-mw-radio-kit","title":"HJW Electronics Choccy Block Terminal Strip AM MW Radio Kit CBRK-1","description":"\u003cp\u003eThis is a kit of electronic parts which will allow you to build a MW AM transistor radio using modern parts as detailed on the Useful Components website:\u003cbr\u003e\u003cbr\u003ehttps:\/\/www.usefulcomponents.com\/main_contents\/projects\/choccy_block_trf_radio\/choccy_block_trf_radio.html\u003cbr\u003e\u003cbr\u003eElectronic Parts Included in the Kit\u003cbr\u003e\u003cbr\u003eQty Refs Type Value\u003cbr\u003e\u003cbr\u003e1 VC1 variable capacitor 200PF approx\u003cbr\u003e1 L1 ferrite rod d=9.5mm l=100mm see text\u003cbr\u003e\u003cbr\u003e2 R1,R3 resistor 1K\u003cbr\u003e1 R11 resistor 470R\u003cbr\u003e1 R12 resistor 1.8K\u003cbr\u003e3 R2,R4,R8 resistor 6.8K\u003cbr\u003e1 R7 resistor 12K\u003cbr\u003e1 R9 resistor 27K\u003cbr\u003e3 R5,R14,R15 resistor 47K\u003cbr\u003e1 R10 resistor 100K\u003cbr\u003e1 R6 resistor 330K\u003cbr\u003e2 R13, R16 resistor 220R\u003cbr\u003e\u003cbr\u003e1 VR1, SW1 switched log pot A10K\u003cbr\u003e1 C9 ceramic capacitor 68pF\u003cbr\u003e5 C1,C2,C3,C4,C5 ceramic capacitor 10NF\u003cbr\u003e1 C6 ceramic capacitor 100NF\u003cbr\u003e1 C7 electrolytic capacitor 10UF\u003cbr\u003e1 C8 NP elec capacitor 4.7UF\u003cbr\u003e3 C10,C11,C12 electrolytic capacitor 100UF\u003cbr\u003e\u003cbr\u003e2 D1,D2 diode 1N4148\u003cbr\u003e\u003cbr\u003e1 Q4 NPN audio transistor BC549C\u003cbr\u003e1 Q3 PNP audio transistor BC560C\u003cbr\u003e1 Q5 NPN driver transistor BD139\u003cbr\u003e1 Q6 PNP driver transistor BD140\u003cbr\u003e2 Q1,Q2 NPN RF transistor BF199\u003cbr\u003e\u003cbr\u003eMiscellaneous\u003cbr\u003e\u003cbr\u003e1 SP1 65mm 8R loudspeaker\u003cbr\u003e1 J1 PP3 battery clip\u003cbr\u003e3 3A 12-way terminal strip\u003cbr\u003e2 3A 1-way terminal strip\u003cbr\u003e6 M2.5 bolts 20mm\u003cbr\u003e2 M2.5 bolts 4mm\u003cbr\u003e8 M2.5 washers\u003cbr\u003e6 M2.5 nuts\u003cbr\u003e2 short shaft control knobs\u003cbr\u003e1 orange single core wire 3m\u003cbr\u003e1 yellow single core wire 0.1m\u003cbr\u003e1 red single core wire 0.2m\u003cbr\u003e1 black single core wire 0.2m\u003cbr\u003e1 cardboard box enclosure\u003cbr\u003e\u003cbr\u003eExtras Not Supplied\u003cbr\u003e\u003cbr\u003ePaper glue\u003cbr\u003ePaper\u003cbr\u003eSmall screwdriver\u003cbr\u003eScissors\u003cbr\u003eSticky tape\u003cbr\u003eSmall wire cutters\u003cbr\u003eCraft Knife\u003cbr\u003ePP3 9V Battery\u003cbr\u003e\u003cbr\u003eAll the build information is provided online so that easy updates can be added. Please refresh the page using the F5 key before starting out, just in case an update has been made. There is no paper documentation supplied.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eAll the build information is provided online so that easy updates can be added. Please refresh the page using the F5 key before starting out, just in case an update has been made. There is no paper documentation supplied.\u003cbr\u003e\u003cbr\u003ePeople have had plenty of success with this tried and tested design. If you put the parts in the right places and build as described, you'll have an instant school science project. There are some additional experiments described on the web-page for that bit of extra credit.\u003cbr\u003e\u003cbr\u003eA quicker to build and somewhat more economical plug-in breadboard version that uses the same circuit is available on another listing.\u003c\/p\u003e","brand":"HJW Electronics","offers":[{"title":"Default Title","offer_id":58501255430528,"sku":null,"price":38.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/files\/cbrk_1_kit_of_parts_s.jpg?v=1784584125"},{"product_id":"radio-kit-six-transistor-using-solderless-breadboard-am-mw-receiver","title":"Six Transistor AM Radio Kit Using Solderless Breadboard With Full Online Instructions BBRK-1","description":"\u003cp\u003e\u003cbr\u003eSix Transistor AM Radio Kit Of Parts Using Solderless Breadboard To Make MW Receiver with Fully Detailed Online Instructions.\u003cbr\u003e\u003cbr\u003eThis is a kit of electronic parts which will allow you to build a MW AM transistor radio using modern parts as seen on the Useful Components web page \"The Breadboard Six Transistor Radio Kit.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.usefulcomponents.com\/main_contents\/projects\/breadboard_trf_radio\/breadboard_trf_radio.html\" title=\"BBRK-1 Breadboard Radio Kit Instructions\"\u003ehttps:\/\/www.usefulcomponents.com\/main_contents\/projects\/breadboard_trf_radio\/breadboard_trf_radio.html\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003eThis is the Bill Of Materials:\u003cbr\u003e\u003cbr\u003eBill Of Materials:\u003cbr\u003e\u003cbr\u003eElectronics Parts Included in the Kit\u003cbr\u003e\u003cbr\u003eQty Refs Type Value\u003cbr\u003e\u003cbr\u003e1 VC1 variable capacitor 200PF approx\u003cbr\u003e1 L1 ferrite rod d=9.5mm, l=100mm see text\u003cbr\u003e2 R1,R3 resistor 1K\u003cbr\u003e1 R11 resistor 470R\u003cbr\u003e1 R12 resistor 1.8K\u003cbr\u003e3 R2,R4,R8 resistor 6.8K\u003cbr\u003e1 R7 resistor 12K\u003cbr\u003e1 R9 resistor 27K\u003cbr\u003e3 R5,R14,R15 resistor 47K\u003cbr\u003e1 R10 resistor 100K\u003cbr\u003e1 R6 resistor 330K\u003cbr\u003e2 R13, R16 resistor 220R\u003cbr\u003e1 VR1 volume pot pcb 10K\u003cbr\u003e1 C9 ceramic capacitor 68pF\u003cbr\u003e5 C1,C2,C3,C4,C5 ceramic capacitor 10NF\u003cbr\u003e1 C6 ceramic capacitor 100NF\u003cbr\u003e1 C7 electrolytic capacitor 10UF\u003cbr\u003e1 C8 NP elec capacitor 4.7UF\u003cbr\u003e4 C10,C11,C12,C13 electrolytic capacitor 100UF\u003cbr\u003e2 D1,D2 diode 1N4148\u003cbr\u003e1 Q4 NPN audio transistor BC549C\u003cbr\u003e1 Q3 PNP audio transistor BC560C\u003cbr\u003e1 Q5 NPN driver transistor BD139\u003cbr\u003e1 Q6 PNP driver transistor BD140\u003cbr\u003e2 Q1,Q2 NPN RF transistor BF199\u003cbr\u003e\u003cbr\u003eMiscellaneous\u003cbr\u003e\u003cbr\u003e1 LS1 65mm 8R loudspeaker\u003cbr\u003e1 J1 PP3 battery clip\u003cbr\u003e1 S1 slide switch pcb\u003cbr\u003e1 plug-in breadboard\u003cbr\u003e1 3A 3-way terminal strip\u003cbr\u003e2 M2.5 bolts 4mm\u003cbr\u003e4 M2.5 washers\u003cbr\u003e1 short shaft control knob\u003cbr\u003e1 single core wire 4m\u003cbr\u003e\u003cbr\u003eExtras Not Supplied\u003cbr\u003e\u003cbr\u003ePaper glue\u003cbr\u003ePaper\u003cbr\u003eSmall screwdriver\u003cbr\u003eScissors\u003cbr\u003eSticky tape\u003cbr\u003eSmall wire cutters\u003cbr\u003eCraft Knife\u003cbr\u003ePP3 9V Battery\u003cbr\u003e\u003cbr\u003eAll the build information is provided online so that easy updates can be added. There is no paper documentation supplied. People have had plenty of success with this tried and tested design. If you put the parts in the right places and build as described, you'll have an instant school science project. There are some additional experiments described on the web-page for that bit of extra credit.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/www.usefulcomponents.com\/main_contents\/projects\/breadboard_trf_radio\/breadboard_trf_radio_modifications.html\" title=\"BBRK-1 Breadboard Radio Modifications And Extras\"\u003eBreadboard Radio Modifications And Extras\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003eFor the electronics engineers there's also a fully detailed university level circuit description. You don't need to understand all this to make the kit work.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/www.usefulcomponents.com\/main_contents\/projects\/breadboard_trf_radio\/breadboard_trf_radio_circuit_description.html\" title=\"BBRK-1 HJW Electronics University Level Detailed Circuit Description\"\u003eBreadboard Transistor Radio Detailed Circuit Description\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HJW Electronics","offers":[{"title":"Default Title","offer_id":58501263491456,"sku":"BBRK-1","price":24.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/files\/bbrk_1_pack_w.jpg?v=1784580076"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2136\/1280\/collections\/kits_11.jpg?v=1784559321","url":"https:\/\/shop.usefulcomponents.com\/collections\/kits.oembed","provider":"HJW Electronics","version":"1.0","type":"link"}